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• Return Empty String as NULL

  - by Daniel

  I have a listbox select and I want when the user selects null for the empty string it produces to pull the nulls from the SQL table. Here's what I have now. Blank strings return nothing because there are no empty fields in the table. SELECT * FROM dbo.Table WHERE ID = " & TextBox2.Text & " and And Field1 IN (" & Msg1 & ") How do I code that?

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• MySQL Unions/Subselects not utilizing keys from associated tables

  - by Brett

  I've noticed by doing EXPLAINs that when a MySQL union between two tables is used, mysql creates a temporary table, but the temp table does not use keys, so queries are slowed considerably. Here is an example: SELECT * FROM ( SELECT `part_number`, `part_manufacturer_clean`, `part_number_clean`, `part_heci`, `part_manufacturer`, `part_description` FROM `new_products` AS `a` UNION SELECT `part` as `part_number`, `manulower` as `part_manufacturer_clean`, `partdeluxe` as `part_number_clean`, `heci` as `part_heci`, `manu` as `part_manufacturer`, `description` as `part_description` FROM `warehouse` AS `b` ) AS `c` WHERE `part_manufacturer_clean` = 'adc' EXPLAIN yields this: id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> ALL (NULL) (NULL) (NULL) (NULL) 17206 Using where 2 DERIVED a ALL (NULL) (NULL) (NULL) (NULL) 17743 3 UNION b ALL (NULL) (NULL) (NULL) (NULL) 5757 (NULL) UNION RESULT <union2,3> ALL (NULL) (NULL) (NULL) (NULL) (NULL) In this case, part_manufacturer_clean and manulower are keys in both tables. When I don't use the subselects and union, and just use one table, everything works fine. I'm not sure if the issue is with the union or with the subselects. Is there any way to union two tables and still use keys/indexes for performance?

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• zend tool is not working

  - by user362155

  Hi, I've installed ZendStudio 7.2 it creates project normally with no error but when i try to add action(s) in it, it says project profile does not exist. and the error log is as follow: executing zf create action showLatest index-action-included An Error Has Occurred A project profile was not found. Zend Framework Command Line Console Tool v1.10.2 Details for action "Create" and provider "Action" Action zf create action name controller-name[=Index] view-included[=1] module Failed loading ./ZendDebugger.so: (null) PHP Warning: PHP Startup: Unable to load dynamic library './ext/bcmath.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/bz2.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/calendar.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/ctype.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/curl.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/exif.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/fileinfo.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/ftp.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/gd.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/imagick.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/json.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/ldap.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/mbstring.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/mcrypt.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/memcache.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/mhash.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/mime_magic.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/mssql.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/mysql.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/mysqli.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/pcntl.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/pgsql.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/posix.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/shmop.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/soap.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/sockets.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/sqlite.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/sysvmsg.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/sysvsem.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/sysvshm.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/tidy.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/tokenizer.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/wddx.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/xmlreader.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/xmlrpc.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/xsl.so' - (null) in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './ext/zip.so' - (null) in Unknown on line 0 please help me to configure latest ZendTool with ZendStudio 7.2 or how can i get rid of this. i am runin ZS 7.2 on my mac os x 10.5.8 thanks.

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• Comparing two date ranges within the same table

  - by Danny Herran

  I have a table with sales per store as follows: SQL> select * from sales; ID ID_STORE DATE TOTAL ---------- -------- ---------- -------------------------------------------------- 1 1 2010-01-01 500.00 2 1 2010-01-02 185.00 3 1 2010-01-03 135.00 4 1 2009-01-01 165.00 5 1 2009-01-02 175.00 6 5 2010-01-01 130.00 7 5 2010-01-02 135.00 8 5 2010-01-03 130.00 9 6 2010-01-01 100.00 10 6 2010-01-02 12.00 11 6 2010-01-03 85.00 12 6 2009-01-01 135.00 13 6 2009-01-02 400.00 14 6 2009-01-07 21.00 15 6 2009-01-08 45.00 16 8 2009-01-09 123.00 17 8 2009-01-10 581.00 17 rows selected. What I need to do is to compare two date ranges within that table. Lets say I need to know the differences in sales between 01 Jan 2009 to 10 Jan 2009 AGAINST 01 Jan 2010 to 10 Jan 2010. I'd like to build a query that returns something like this: ID_STORE_A DATE_A TOTAL_A ID_STORE_B DATE_B TOTAL_B ---------- ---------- --------- ---------- ---------- ------------------- 1 2010-01-01 500.00 1 2009-01-01 165.00 1 2010-01-02 185.00 1 2009-01-02 175.00 1 2010-01-03 135.00 1 NULL NULL 5 2010-01-01 130.00 5 NULL NULL 5 2010-01-02 135.00 5 NULL NULL 5 2010-01-03 130.00 5 NULL NULL 6 2010-01-01 100.00 6 2009-01-01 135.00 6 2010-01-02 12.00 6 2009-01-02 400.00 6 2010-01-03 85.00 6 NULL NULL 6 NULL NULL 6 2009-01-07 21.00 6 NULL NULL 6 2009-01-08 45.00 6 NULL NULL 8 2009-01-09 123.00 6 NULL NULL 8 2009-01-10 581.00 So, even if there are no sales in one range or another, it should just fill the empty space with NULL. So far, I've come up with this quick query, but I the "dates" from sales to sales2 sometimes are different in each row: SELECT sales.*, sales2.* FROM sales LEFT JOIN sales AS sales2 ON (sales.id_store=sales2.id_store) WHERE sales.date >= '2010-01-01' AND sales.date <= '2010-01-10' AND sales2.date >= '2009-01-01' AND sales2.date <= '2009-01-10' ORDER BY sales.id_store ASC, sales.date ASC, sales2.date ASC What am I missing?

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• Calling a method on an unitialized object (null pointer)

  - by Florin

  What is the normal behavior in Objective-C if you call a method on an object (pointer) that is nil (maybe because someone forgot to initialize it)? Shouldn't it generate some kind of an error (segmentation fault, null pointer exception...)? If this is normal behavior, is there a way of changing this behavior (by configuring the compiler) so that the program raises some kind of error / exception at runtime? To make it more clear what I am talking about, here's an example. Having this class: @interface Person : NSObject { NSString *name; } @property (nonatomic, retain) NSString *name; - (void)sayHi; @end with this implementation: @implementation Person @synthesize name; - (void)dealloc { [name release]; [super dealloc]; } - (void)sayHi { NSLog(@"Hello"); NSLog(@"My name is %@.", name); } @end Somewhere in the program I do this: Person *person = nil; //person = [[Person alloc] init]; // let's say I comment this line person.name = @"Mike"; // shouldn't I get an error here? [person sayHi]; // and here [person release]; // and here

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• Passing NULL value

  - by FFXIII

  Hi. I use an instance of NSXMLParser. I store found chars in NSMutableStrings that are stored in an NSMutableDictionary and these Dicts are then added to an NSMutableArray. When I test this everything seems normal: I count 1 array, x dictionnaries and x strings. In a detailview controller file I want to show my parsed results. I call the class where everthing is stored but I get (null) returned. This is what I do (wrong): XMLParser.h @interface XMLParser : NSObject { NSMutableArray *array; NSMUtableDictionary *dictionary; NSSMutabletring *element; } @property (nonatomic, retain) NSMutableArray *array; @property (nonatomic, retain) NSMutableDictionary *dictionary; @property (nonatomic, retain) NSMutableString *element; XMLParser.m @synthesize array, dictionary, element; //parsing goes on here & works fine //so 'element' is filled with content and stored in a dict in an array //and released at the end of the file In my controller file I do this: controller.h @class XMLParser; @interface controller : UIViewController { XMLParser *aXMLParser; } @property (nonatomic, retain) XMLParser *aXMLParser; controller.m #import "XMLParser.h" @synthesize aXMLParser; - (void)viewDidLoad { NSLog(@"test array: %@", aXMLParser.array); NSLog(@"test dict: %@", aXMLParser.dictionary); NSLog(@"test element: %@", aXMLParser.element); } When I test the value of my array, a dict or an element in the XMLParser.h file I get my result. What am I doing wrong so I can't call my results in my controller file? Any help is welcome, because I'm pretty stuck right now :/

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• Get the parent class of a null object (C# Reflection)

  - by Nick

  How would I get the parent class of an object that has a value of null? For example... 'Class A' contains 'int? i' which is not set to any value when the class is created. Then in some other place in the code I want to pass in 'i' as a parameter to some function. Using 'i' as the only info, I want to be able to figure out that 'Class A' "owns" 'i'. The reason for this is because 'Class A' also contains some other object, and I want to call this other object's value from that same function mentioned in the above paragraph. Could also be: public class A { public class B { public int? i; public int? j; } B classBInstance = new B(); public string s; } { ... A someClassAInstance = new A(); ... doSomething(someClassAInstance.classBInstance.i); ... } public static bool doSomething(object theObject) { string s = /* SOMETHING on theObject to get to "s" from Class A */; int someValue = (int)theObject; }

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• What are the disadvantages of self-encapsulation?

  - by Dave Jarvis

  Background Tony Hoare's billion dollar mistake was the invention of null. Subsequently, a lot of code has become riddled with null pointer exceptions (segfaults) when software developers try to use (dereference) uninitialized variables. In 1989, Wirfs-Brock and Wikerson wrote: Direct references to variables severely limit the ability of programmers to re?ne existing classes. The programming conventions described here structure the use of variables to promote reusable designs. We encourage users of all object-oriented languages to follow these conventions. Additionally, we strongly urge designers of object-oriented languages to consider the effects of unrestricted variable references on reusability. Problem A lot of software, especially in Java, but likely in C# and C++, often uses the following pattern: public class SomeClass { private String someAttribute; public SomeClass() { this.someAttribute = "Some Value"; } public void someMethod() { if( this.someAttribute.equals( "Some Value" ) ) { // do something... } } public void setAttribute( String s ) { this.someAttribute = s; } public String getAttribute() { return this.someAttribute; } } Sometimes a band-aid solution is used by checking for null throughout the code base: public void someMethod() { assert this.someAttribute != null; if( this.someAttribute.equals( "Some Value" ) ) { // do something... } } public void anotherMethod() { assert this.someAttribute != null; if( this.someAttribute.equals( "Some Default Value" ) ) { // do something... } } The band-aid does not always avoid the null pointer problem: a race condition exists. The race condition is mitigated using: public void anotherMethod() { String someAttribute = this.someAttribute; assert someAttribute != null; if( someAttribute.equals( "Some Default Value" ) ) { // do something... } } Yet that requires two statements (assignment to local copy and check for null) every time a class-scoped variable is used to ensure it is valid. Self-Encapsulation Ken Auer's Reusability Through Self-Encapsulation (Pattern Languages of Program Design, Addison Wesley, New York, pp. 505-516, 1994) advocated self-encapsulation combined with lazy initialization. The result, in Java, would resemble: public class SomeClass { private String someAttribute; public SomeClass() { setAttribute( "Some Value" ); } public void someMethod() { if( getAttribute().equals( "Some Value" ) ) { // do something... } } public void setAttribute( String s ) { this.someAttribute = s; } public String getAttribute() { String someAttribute = this.someAttribute; if( someAttribute == null ) { setAttribute( createDefaultValue() ); } return someAttribute; } protected String createDefaultValue() { return "Some Default Value"; } } All duplicate checks for null are superfluous: getAttribute() ensures the value is never null at a single location within the containing class. Efficiency arguments should be fairly moot -- modern compilers and virtual machines can inline the code when possible. As long as variables are never referenced directly, this also allows for proper application of the Open-Closed Principle. Question What are the disadvantages of self-encapsulation, if any? (Ideally, I would like to see references to studies that contrast the robustness of similarly complex systems that use and don't use self-encapsulation, as this strikes me as a fairly straightforward testable hypothesis.)

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• ASP.Net repeater item.DataItem is null

  - by mattgcon

  Within a webpage, upon loading, I fill a dataset with two table with a relation between those tables and then load the data into a repeater with a nested repeater. This can also occur after the user clicks on a button. The data gets loaded from a SQL database and the repeater datasource is set to the dataset after a postback. However, when ItemDataBound occurs the Item.Dataitem is always null. Why would this occur? below is my HTML repeater code <asp:Repeater ID="rptCustomSpaList" runat="server" onitemdatabound="rptCustomSpaList_ItemDataBound"> <HeaderTemplate> </HeaderTemplate> <ItemTemplate> <table> <tr> <td> <asp:Label ID="Label3" runat="server" Text="Spa Series:"></asp:Label> </td> <td> <asp:Label ID="Label4" runat="server" Text='<%#DataBinder.Eval(Container.DataItem, "SPASERIESVALUE") %>'></asp:Label> </td> </tr> <tr> <td> <asp:Label ID="Label5" runat="server" Text="Spa Model:"></asp:Label> </td> <td> <asp:Label ID="Label6" runat="server" Text='<%#DataBinder.Eval(Container.DataItem, "SPAMODELVALUE") %>'></asp:Label> </td> </tr> <tr> <td> <asp:Label ID="Label9" runat="server" Text="Acrylic Color:"></asp:Label> </td> <td> <asp:Label ID="Label10" runat="server" Text='<%#DataBinder.Eval(Container.DataItem, "ACRYLICCOLORVALUE") %>'></asp:Label> </td> </tr> <tr> <td> <asp:Label ID="Label11" runat="server" Text="Cabinet Color:"></asp:Label> </td> <td> <asp:Label ID="Label12" runat="server" Text='<%#DataBinder.Eval(Container.DataItem, "CABPANCOLORVALUE") %>'></asp:Label> </td> </tr> <tr> <td> <asp:Label ID="Label17" runat="server" Text="Cabinet Type:"></asp:Label> </td> <td> <asp:Label ID="Label18" runat="server" Text='<%#DataBinder.Eval(Container.DataItem, "CABINETVALUE") %>'></asp:Label> </td> </tr> <tr> <td> <asp:Label ID="Label13" runat="server" Text="Cover Color:"></asp:Label> </td> <td> <asp:Label ID="Label14" runat="server" Text='<%#DataBinder.Eval(Container.DataItem, "COVERCOLORVALUE") %>'></asp:Label> </td> </tr> </table> <asp:Label ID="Label15" runat="server" Text="Options:"></asp:Label> <asp:Repeater ID="rptCustomSpaItem" runat="server"> <HeaderTemplate> <table> </HeaderTemplate> <ItemTemplate> <tr> <td> <asp:Label ID="Label1" runat="server" Text='<%#DataBinder.Eval(Container.DataItem, "PROPERTY") %>'></asp:Label> </td> <td> <asp:Label ID="Label2" runat="server" Text='<%#DataBinder.Eval(Container.DataItem, "VALUE") %>'></asp:Label> </td> </tr> </ItemTemplate> <FooterTemplate> </table> </FooterTemplate> </asp:Repeater> <table> <tr> <td style="padding-top:15px;padding-bottom:30px;"> <asp:Label ID="Label7" runat="server" Text="Configured Price:"></asp:Label> </td> <td style="padding-top:15px;padding-bottom:30px;"> <asp:Label ID="Label8" runat="server" Text='<%#DataBinder.Eval(Container.DataItem, "SPAVALUEVALUE") %>'></asp:Label> </td> </tr> </table> <asp:Label ID="Label16" runat="server" Text="------"></asp:Label> </ItemTemplate> <FooterTemplate></FooterTemplate> </asp:Repeater>

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• dereferencing the null pointer

  - by FredOverflow

  int* p = 0; int* q = &*p; Is this undefined behavior or not? I browsed some related questions, but this specific aspect didn't show up.

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• What is wrong with this null check for data reader

  - by Phil

  c.Open() r = x.ExecuteReader If Not r("filename").IsDbnull Then imagepath = "<img src='images/'" & getimage(r("filename")) & " border='0' align='absmiddle'" End If c.Close() r.Close() I have also tried; If r("filename") Is DBNull.Value Then imagepath = String.Empty Else imagepath = "<img src='images/'" & getimage(r("filename")) & " border='0' align='absmiddle'" End If c.Close() r.Close() The error is: Invalid attempt to read when no data is present. The idea of my code is to build an img src string only when data is available. Help greatly appreciated. Thanks

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• C# ?? null coalescing operator

  - by anirudha

  the null coalescing operator is used for set the value when object is null. if object have some value that nothing change and still have their default value they have.  string str = "i am string";            string message = str ?? "it is null";   the message have same value as str variable because str not null. if str is null that message have value “it is null”; as declared in statement. coalescing operator does not work on nullable operator such as int?

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• How to simulate inner join on very large files in java (without running out of memory)

  - by Constantin

  I am trying to simulate SQL joins using java and very large text files (INNER, RIGHT OUTER and LEFT OUTER). The files have already been sorted using an external sort routine. The issue I have is I am trying to find the most efficient way to deal with the INNER join part of the algorithm. Right now I am using two Lists to store the lines that have the same key and iterate through the set of lines in the right file once for every line in the left file (provided the keys still match). In other words, the join key is not unique in each file so would need to account for the Cartesian product situations ... left_01, 1 left_02, 1 right_01, 1 right_02, 1 right_03, 1 left_01 joins to right_01 using key 1 left_01 joins to right_02 using key 1 left_01 joins to right_03 using key 1 left_02 joins to right_01 using key 1 left_02 joins to right_02 using key 1 left_02 joins to right_03 using key 1 My concern is one of memory. I will run out of memory if i use the approach below but still want the inner join part to work fairly quickly. What is the best approach to deal with the INNER join part keeping in mind that these files may potentially be huge public class Joiner { private void join(BufferedReader left, BufferedReader right, BufferedWriter output) throws Throwable { BufferedReader _left = left; BufferedReader _right = right; BufferedWriter _output = output; Record _leftRecord; Record _rightRecord; _leftRecord = read(_left); _rightRecord = read(_right); while( _leftRecord != null && _rightRecord != null ) { if( _leftRecord.getKey() < _rightRecord.getKey() ) { write(_output, _leftRecord, null); _leftRecord = read(_left); } else if( _leftRecord.getKey() > _rightRecord.getKey() ) { write(_output, null, _rightRecord); _rightRecord = read(_right); } else { List<Record> leftList = new ArrayList<Record>(); List<Record> rightList = new ArrayList<Record>(); _leftRecord = readRecords(leftList, _leftRecord, _left); _rightRecord = readRecords(rightList, _rightRecord, _right); for( Record equalKeyLeftRecord : leftList ){ for( Record equalKeyRightRecord : rightList ){ write(_output, equalKeyLeftRecord, equalKeyRightRecord); } } } } if( _leftRecord != null ) { write(_output, _leftRecord, null); _leftRecord = read(_left); while(_leftRecord != null) { write(_output, _leftRecord, null); _leftRecord = read(_left); } } else { if( _rightRecord != null ) { write(_output, null, _rightRecord); _rightRecord = read(_right); while(_rightRecord != null) { write(_output, null, _rightRecord); _rightRecord = read(_right); } } } _left.close(); _right.close(); _output.flush(); _output.close(); } private Record read(BufferedReader reader) throws Throwable { Record record = null; String data = reader.readLine(); if( data != null ) { record = new Record(data.split("\t")); } return record; } private Record readRecords(List<Record> list, Record record, BufferedReader reader) throws Throwable { int key = record.getKey(); list.add(record); record = read(reader); while( record != null && record.getKey() == key) { list.add(record); record = read(reader); } return record; } private void write(BufferedWriter writer, Record left, Record right) throws Throwable { String leftKey = (left == null ? "null" : Integer.toString(left.getKey())); String leftData = (left == null ? "null" : left.getData()); String rightKey = (right == null ? "null" : Integer.toString(right.getKey())); String rightData = (right == null ? "null" : right.getData()); writer.write("[" + leftKey + "][" + leftData + "][" + rightKey + "][" + rightData + "]\n"); } public static void main(String[] args) { try { BufferedReader leftReader = new BufferedReader(new FileReader("LEFT.DAT")); BufferedReader rightReader = new BufferedReader(new FileReader("RIGHT.DAT")); BufferedWriter output = new BufferedWriter(new FileWriter("OUTPUT.DAT")); Joiner joiner = new Joiner(); joiner.join(leftReader, rightReader, output); } catch (Throwable e) { e.printStackTrace(); } } } After applying the ideas from the proposed answer, I changed the loop to this private void join(RandomAccessFile left, RandomAccessFile right, BufferedWriter output) throws Throwable { long _pointer = 0; RandomAccessFile _left = left; RandomAccessFile _right = right; BufferedWriter _output = output; Record _leftRecord; Record _rightRecord; _leftRecord = read(_left); _rightRecord = read(_right); while( _leftRecord != null && _rightRecord != null ) { if( _leftRecord.getKey() < _rightRecord.getKey() ) { write(_output, _leftRecord, null); _leftRecord = read(_left); } else if( _leftRecord.getKey() > _rightRecord.getKey() ) { write(_output, null, _rightRecord); _pointer = _right.getFilePointer(); _rightRecord = read(_right); } else { long _tempPointer = 0; int key = _leftRecord.getKey(); while( _leftRecord != null && _leftRecord.getKey() == key ) { _right.seek(_pointer); _rightRecord = read(_right); while( _rightRecord != null && _rightRecord.getKey() == key ) { write(_output, _leftRecord, _rightRecord ); _tempPointer = _right.getFilePointer(); _rightRecord = read(_right); } _leftRecord = read(_left); } _pointer = _tempPointer; } } if( _leftRecord != null ) { write(_output, _leftRecord, null); _leftRecord = read(_left); while(_leftRecord != null) { write(_output, _leftRecord, null); _leftRecord = read(_left); } } else { if( _rightRecord != null ) { write(_output, null, _rightRecord); _rightRecord = read(_right); while(_rightRecord != null) { write(_output, null, _rightRecord); _rightRecord = read(_right); } } } _left.close(); _right.close(); _output.flush(); _output.close(); } UPDATE While this approach worked, it was terribly slow and so I have modified this to create files as buffers and this works very well. Here is the update ... private long getMaxBufferedLines(File file) throws Throwable { long freeBytes = Runtime.getRuntime().freeMemory() / 2; return (freeBytes / (file.length() / getLineCount(file))); } private void join(File left, File right, File output, JoinType joinType) throws Throwable { BufferedReader leftFile = new BufferedReader(new FileReader(left)); BufferedReader rightFile = new BufferedReader(new FileReader(right)); BufferedWriter outputFile = new BufferedWriter(new FileWriter(output)); long maxBufferedLines = getMaxBufferedLines(right); Record leftRecord; Record rightRecord; leftRecord = read(leftFile); rightRecord = read(rightFile); while( leftRecord != null && rightRecord != null ) { if( leftRecord.getKey().compareTo(rightRecord.getKey()) < 0) { if( joinType == JoinType.LeftOuterJoin || joinType == JoinType.LeftExclusiveJoin || joinType == JoinType.FullExclusiveJoin || joinType == JoinType.FullOuterJoin ) { write(outputFile, leftRecord, null); } leftRecord = read(leftFile); } else if( leftRecord.getKey().compareTo(rightRecord.getKey()) > 0 ) { if( joinType == JoinType.RightOuterJoin || joinType == JoinType.RightExclusiveJoin || joinType == JoinType.FullExclusiveJoin || joinType == JoinType.FullOuterJoin ) { write(outputFile, null, rightRecord); } rightRecord = read(rightFile); } else if( leftRecord.getKey().compareTo(rightRecord.getKey()) == 0 ) { String key = leftRecord.getKey(); List<File> rightRecordFileList = new ArrayList<File>(); List<Record> rightRecordList = new ArrayList<Record>(); rightRecordList.add(rightRecord); rightRecord = consume(key, rightFile, rightRecordList, rightRecordFileList, maxBufferedLines); while( leftRecord != null && leftRecord.getKey().compareTo(key) == 0 ) { processRightRecords(outputFile, leftRecord, rightRecordFileList, rightRecordList, joinType); leftRecord = read(leftFile); } // need a dispose for deleting files in list } else { throw new Exception("DATA IS NOT SORTED"); } } if( leftRecord != null ) { if( joinType == JoinType.LeftOuterJoin || joinType == JoinType.LeftExclusiveJoin || joinType == JoinType.FullExclusiveJoin || joinType == JoinType.FullOuterJoin ) { write(outputFile, leftRecord, null); } leftRecord = read(leftFile); while(leftRecord != null) { if( joinType == JoinType.LeftOuterJoin || joinType == JoinType.LeftExclusiveJoin || joinType == JoinType.FullExclusiveJoin || joinType == JoinType.FullOuterJoin ) { write(outputFile, leftRecord, null); } leftRecord = read(leftFile); } } else { if( rightRecord != null ) { if( joinType == JoinType.RightOuterJoin || joinType == JoinType.RightExclusiveJoin || joinType == JoinType.FullExclusiveJoin || joinType == JoinType.FullOuterJoin ) { write(outputFile, null, rightRecord); } rightRecord = read(rightFile); while(rightRecord != null) { if( joinType == JoinType.RightOuterJoin || joinType == JoinType.RightExclusiveJoin || joinType == JoinType.FullExclusiveJoin || joinType == JoinType.FullOuterJoin ) { write(outputFile, null, rightRecord); } rightRecord = read(rightFile); } } } leftFile.close(); rightFile.close(); outputFile.flush(); outputFile.close(); } public void processRightRecords(BufferedWriter outputFile, Record leftRecord, List<File> rightFiles, List<Record> rightRecords, JoinType joinType) throws Throwable { for(File rightFile : rightFiles) { BufferedReader rightReader = new BufferedReader(new FileReader(rightFile)); Record rightRecord = read(rightReader); while(rightRecord != null){ if( joinType == JoinType.LeftOuterJoin || joinType == JoinType.RightOuterJoin || joinType == JoinType.FullOuterJoin || joinType == JoinType.InnerJoin ) { write(outputFile, leftRecord, rightRecord); } rightRecord = read(rightReader); } rightReader.close(); } for(Record rightRecord : rightRecords) { if( joinType == JoinType.LeftOuterJoin || joinType == JoinType.RightOuterJoin || joinType == JoinType.FullOuterJoin || joinType == JoinType.InnerJoin ) { write(outputFile, leftRecord, rightRecord); } } } /** * consume all records having key (either to a single list or multiple files) each file will * store a buffer full of data. The right record returned represents the outside flow (key is * already positioned to next one or null) so we can't use this record in below while loop or * within this block in general when comparing current key. The trick is to keep consuming * from a List. When it becomes empty, re-fill it from the next file until all files have * been consumed (and the last node in the list is read). The next outside iteration will be * ready to be processed (either it will be null or it points to the next biggest key * @throws Throwable * */ private Record consume(String key, BufferedReader reader, List<Record> records, List<File> files, long bufferMaxRecordLines ) throws Throwable { boolean processComplete = false; Record record = records.get(records.size() - 1); while(!processComplete){ long recordCount = records.size(); if( record.getKey().compareTo(key) == 0 ){ record = read(reader); while( record != null && record.getKey().compareTo(key) == 0 && recordCount < bufferMaxRecordLines ) { records.add(record); recordCount++; record = read(reader); } } processComplete = true; // if record is null, we are done if( record != null ) { // if the key has changed, we are done if( record.getKey().compareTo(key) == 0 ) { // Same key means we have exhausted the buffer. // Dump entire buffer into a file. The list of file // pointers will keep track of the files ... processComplete = false; dumpBufferToFile(records, files); records.clear(); records.add(record); } } } return record; } /** * Dump all records in List of Record objects to a file. Then, add that * file to List of File objects * * NEED TO PLACE A LIMIT ON NUMBER OF FILE POINTERS (check size of file list) * * @param records * @param files * @throws Throwable */ private void dumpBufferToFile(List<Record> records, List<File> files) throws Throwable { String prefix = "joiner_" + files.size() + 1; String suffix = ".dat"; File file = File.createTempFile(prefix, suffix, new File("cache")); BufferedWriter writer = new BufferedWriter(new FileWriter(file)); for( Record record : records ) { writer.write( record.dump() ); } files.add(file); writer.flush(); writer.close(); }

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• LINQ + Find count of non-null values

  - by Ashutosh

  I have a table with the below structure. ID VALUE 1 3.2 2 NULL 4 NULL 5 NULL 7 NULL 10 1.8 11 NULL 12 3.2 15 4.7 17 NULL 22 NULL 24 NULL 25 NULL 27 NULL 28 7 I would like to get the max count of consecutive null values in the table. Any help would be greatly appreciated. THanks Ashutosh

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• LINQ query null reference exception

  - by user289082

  Hi! I have the next query: var bPermisos = from b in ruc.Permisos where b.IdUsuario == cu.Id select new Permisos(){ Id=b.Id, IdUsuario=b.Id, IdPerfil=b.Id, Estatus=b.Estatus }; var qSisPer = from perm in bPermisos select new { perm.IdPerfil,perm.Cat_Perfil.Nivel,perm.Cat_Perfil.Nombre,Nombre_Sistem=perm.Cat_Perfil.Cat_Sistema.Nombre}; And is throwing me an exception, plz help!

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• Varchar columns: Nullable or not.

  - by NYSystemsAnalyst

  The database development standards in our organization state the varchar fields should not allow null values. They should have a default value of an empty string (""). I know this makes querying and concatenation easier, but today, one of my coworkers questioned me about why that standard only existed for varchar types an not other datatypes (int, datetime, etc). I would like to know if others consider this to be a valid, defensible standard, or if varchar should be treated the same as fields of other data types? I believe this standard is valid for the following reason: I believe that an empty string and null values, though technically different, are conceptually the same. An empty, zero length string is a string that does not exist. It has no value. However, a numeric value of 0 is not the same as NULL. For example, if a field called OutstandingBalance has a value of 0, it means there are $0.00 remaining. However, if the same field is NULL, that means the value is unknown. On the other hand, a field called CustomerName with a value of "" is basically the same as a value of NULL because both represent the non-existence of the name. I read somewhere that an analogy for an empty string vs. NULL is that of a blank CD vs. no CD. However, I believe this to be a false analogy because a blank CD still phyically exists and still has physical data space that does not have any meaningful data written to it. Basically, I believe a blank CD is the equivalent of a string of blank spaces (" "), not an empty string. Therefore, I believe a string of blank spaces to be an actual value separate from NULL, but an empty string to be the absense of value conceptually equivalent to NULL. Please let me know if my beliefs regarding variable length strings are valid, or please enlighten me if they are not. I have read several blogs / arguments regarding this subject, but still do not see a true conceptual difference between NULLs and empty strings.

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• Groovy conpiler give the output as null null

  - by Bunny Rabbit

  while compiling a groovy class the conpiler gives me an output nullnull? what does that mean ?i am left puzzled.

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• What is null exactly in java?

  - by Brodie

  is it a special value? or is it a special memory address? what is it exactly?

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• IPsec tunnel to Android device not created even though there is an IKE SA

  - by Quentin Swain

  I'm trying to configure a VPN tunnel between an Android device running 4.1 and a Fedora 17 Linux box running strongSwan 5.0. The device reports that it is connected and strongSwan statusall returns that there is an IKE SA, but doesn't display a tunnel. I used the instructions for iOS in the wiki to generate certificates and configure strongSwan. Since Android uses a modified version of racoon this should work and since the connection is partly established I think I am on the right track. I don't see any errors about not being able to create the tunnel. This is the configuration for the strongSwan connection conn android2 keyexchange=ikev1 authby=xauthrsasig xauth=server left=96.244.142.28 leftsubnet=0.0.0.0/0 leftfirewall=yes leftcert=serverCert.pem right=%any rightsubnet=10.0.0.0/24 rightsourceip=10.0.0.2 rightcert=clientCert.pem ike=aes256-sha1-modp1024 auto=add This is the output of strongswan statusall Status of IKE charon daemon (strongSwan 5.0.0, Linux 3.3.4-5.fc17.x86_64, x86_64): uptime: 20 minutes, since Oct 31 10:27:31 2012 malloc: sbrk 270336, mmap 0, used 198144, free 72192 worker threads: 8 of 16 idle, 7/1/0/0 working, job queue: 0/0/0/0, scheduled: 7 loaded plugins: charon aes des sha1 sha2 md5 random nonce x509 revocation constraints pubkey pkcs1 pkcs8 pgp dnskey pem openssl fips-prf gmp xcbc cmac hmac attr kernel-netlink resolve socket-default stroke updown xauth-generic Virtual IP pools (size/online/offline): android-hybrid: 1/0/0 android2: 1/1/0 Listening IP addresses: 96.244.142.28 Connections: android-hybrid: %any...%any IKEv1 android-hybrid: local: [C=CH, O=strongSwan, CN=vpn.strongswan.org] uses public key authentication android-hybrid: cert: "C=CH, O=strongSwan, CN=vpn.strongswan.org" android-hybrid: remote: [%any] uses XAuth authentication: any android-hybrid: child: dynamic === dynamic TUNNEL android2: 96.244.142.28...%any IKEv1 android2: local: [C=CH, O=strongSwan, CN=vpn.strongswan.org] uses public key authentication android2: cert: "C=CH, O=strongSwan, CN=vpn.strongswan.org" android2: remote: [C=CH, O=strongSwan, CN=client] uses public key authentication android2: cert: "C=CH, O=strongSwan, CN=client" android2: remote: [%any] uses XAuth authentication: any android2: child: 0.0.0.0/0 === 10.0.0.0/24 TUNNEL Security Associations (1 up, 0 connecting): android2[3]: ESTABLISHED 10 seconds ago, 96.244.142.28[C=CH, O=strongSwan, CN=vpn.strongswan.org]...208.54.35.241[C=CH, O=strongSwan, CN=client] android2[3]: Remote XAuth identity: android android2[3]: IKEv1 SPIs: 4151e371ad46b20d_i 59a56390d74792d2_r*, public key reauthentication in 56 minutes android2[3]: IKE proposal: AES_CBC_256/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_1024 The output of ip -s xfrm policy src ::/0 dst ::/0 uid 0 socket in action allow index 3851 priority 0 ptype main share any flag (0x00000000) lifetime config: limit: soft 0(bytes), hard 0(bytes) limit: soft 0(packets), hard 0(packets) expire add: soft 0(sec), hard 0(sec) expire use: soft 0(sec), hard 0(sec) lifetime current: 0(bytes), 0(packets) add 2012-10-31 13:29:08 use - src ::/0 dst ::/0 uid 0 socket out action allow index 3844 priority 0 ptype main share any flag (0x00000000) lifetime config: limit: soft 0(bytes), hard 0(bytes) limit: soft 0(packets), hard 0(packets) expire add: soft 0(sec), hard 0(sec) expire use: soft 0(sec), hard 0(sec) lifetime current: 0(bytes), 0(packets) add 2012-10-31 13:29:08 use - src ::/0 dst ::/0 uid 0 socket in action allow index 3835 priority 0 ptype main share any flag (0x00000000) lifetime config: limit: soft 0(bytes), hard 0(bytes) limit: soft 0(packets), hard 0(packets) expire add: soft 0(sec), hard 0(sec) expire use: soft 0(sec), hard 0(sec) lifetime current: 0(bytes), 0(packets) add 2012-10-31 13:29:08 use - src ::/0 dst ::/0 uid 0 socket out action allow index 3828 priority 0 ptype main share any flag (0x00000000) lifetime config: limit: soft 0(bytes), hard 0(bytes) limit: soft 0(packets), hard 0(packets) expire add: soft 0(sec), hard 0(sec) expire use: soft 0(sec), hard 0(sec) lifetime current: 0(bytes), 0(packets) add 2012-10-31 13:29:08 use - src 0.0.0.0/0 dst 0.0.0.0/0 uid 0 socket in action allow index 3819 priority 0 ptype main share any flag (0x00000000) lifetime config: limit: soft 0(bytes), hard 0(bytes) limit: soft 0(packets), hard 0(packets) expire add: soft 0(sec), hard 0(sec) expire use: soft 0(sec), hard 0(sec) lifetime current: 0(bytes), 0(packets) add 2012-10-31 13:29:08 use 2012-10-31 13:29:39 src 0.0.0.0/0 dst 0.0.0.0/0 uid 0 socket out action allow index 3812 priority 0 ptype main share any flag (0x00000000) lifetime config: limit: soft 0(bytes), hard 0(bytes) limit: soft 0(packets), hard 0(packets) expire add: soft 0(sec), hard 0(sec) expire use: soft 0(sec), hard 0(sec) lifetime current: 0(bytes), 0(packets) add 2012-10-31 13:29:08 use 2012-10-31 13:29:22 src 0.0.0.0/0 dst 0.0.0.0/0 uid 0 socket in action allow index 3803 priority 0 ptype main share any flag (0x00000000) lifetime config: limit: soft 0(bytes), hard 0(bytes) limit: soft 0(packets), hard 0(packets) expire add: soft 0(sec), hard 0(sec) expire use: soft 0(sec), hard 0(sec) lifetime current: 0(bytes), 0(packets) add 2012-10-31 13:29:08 use 2012-10-31 13:29:20 src 0.0.0.0/0 dst 0.0.0.0/0 uid 0 socket out action allow index 3796 priority 0 ptype main share any flag (0x00000000) lifetime config: limit: soft 0(bytes), hard 0(bytes) limit: soft 0(packets), hard 0(packets) expire add: soft 0(sec), hard 0(sec) expire use: soft 0(sec), hard 0(sec) lifetime current: 0(bytes), 0(packets) add 2012-10-31 13:29:08 use 2012-10-31 13:29:20 So a xfrm policy isn't being created for the connection, even though there is an SA between device and strongswan. Executing ip -s xfrm policy on the android device results in the following output: src 0.0.0.0/0 dst 10.0.0.2/32 uid 0 dir in action allow index 40 priority 2147483648 share any flag (0x00000000) lifetime config: limit: soft (INF)(bytes), hard (INF)(bytes) limit: soft (INF)(packets), hard (INF)(packets) expire add: soft 0(sec), hard 0(sec) expire use: soft 0(sec), hard 0(sec) lifetime current: 0(bytes), 0(packets) add 2012-10-31 13:42:08 use - tmpl src 96.244.142.28 dst 25.239.33.30 proto esp spi 0x00000000(0) reqid 0(0x00000000) mode tunnel level required share any enc-mask 00000000 auth-mask 00000000 comp-mask 00000000 src 10.0.0.2/32 dst 0.0.0.0/0 uid 0 dir out action allow index 33 priority 2147483648 share any flag (0x00000000) lifetime config: limit: soft (INF)(bytes), hard (INF)(bytes) limit: soft (INF)(packets), hard (INF)(packets) expire add: soft 0(sec), hard 0(sec) expire use: soft 0(sec), hard 0(sec) lifetime current: 0(bytes), 0(packets) add 2012-10-31 13:42:08 use - tmpl src 25.239.33.30 dst 96.244.142.28 proto esp spi 0x00000000(0) reqid 0(0x00000000) mode tunnel level required share any enc-mask 00000000 auth-mask 00000000 comp-mask 00000000 src 0.0.0.0/0 dst 0.0.0.0/0 uid 0 dir 4 action allow index 28 priority 0 share any flag (0x00000000) lifetime config: limit: soft (INF)(bytes), hard (INF)(bytes) limit: soft (INF)(packets), hard (INF)(packets) expire add: soft 0(sec), hard 0(sec) expire use: soft 0(sec), hard 0(sec) lifetime current: 0(bytes), 0(packets) add 2012-10-31 13:42:04 use 2012-10-31 13:42:08 src 0.0.0.0/0 dst 0.0.0.0/0 uid 0 dir 3 action allow index 19 priority 0 share any flag (0x00000000) lifetime config: limit: soft (INF)(bytes), hard (INF)(bytes) limit: soft (INF)(packets), hard (INF)(packets) expire add: soft 0(sec), hard 0(sec) expire use: soft 0(sec), hard 0(sec) lifetime current: 0(bytes), 0(packets) add 2012-10-31 13:42:04 use 2012-10-31 13:42:08 src 0.0.0.0/0 dst 0.0.0.0/0 uid 0 dir 4 action allow index 12 priority 0 share any flag (0x00000000) lifetime config: limit: soft (INF)(bytes), hard (INF)(bytes) limit: soft (INF)(packets), hard (INF)(packets) expire add: soft 0(sec), hard 0(sec) expire use: soft 0(sec), hard 0(sec) lifetime current: 0(bytes), 0(packets) add 2012-10-31 13:42:04 use 2012-10-31 13:42:06 src 0.0.0.0/0 dst 0.0.0.0/0 uid 0 dir 3 action allow index 3 priority 0 share any flag (0x00000000) lifetime config: limit: soft (INF)(bytes), hard (INF)(bytes) limit: soft (INF)(packets), hard (INF)(packets) expire add: soft 0(sec), hard 0(sec) expire use: soft 0(sec), hard 0(sec) lifetime current: 0(bytes), 0(packets) add 2012-10-31 13:42:04 use 2012-10-31 13:42:07 Logs from charon: 00[DMN] Starting IKE charon daemon (strongSwan 5.0.0, Linux 3.3.4-5.fc17.x86_64, x86_64) 00[KNL] listening on interfaces: 00[KNL] em1 00[KNL] 96.244.142.28 00[KNL] fe80::224:e8ff:fed2:18b2 00[CFG] loading ca certificates from '/etc/strongswan/ipsec.d/cacerts' 00[CFG] loaded ca certificate "C=CH, O=strongSwan, CN=strongSwan CA" from '/etc/strongswan/ipsec.d/cacerts/caCert.pem' 00[CFG] loading aa certificates from '/etc/strongswan/ipsec.d/aacerts' 00[CFG] loading ocsp signer certificates from '/etc/strongswan/ipsec.d/ocspcerts' 00[CFG] loading attribute certificates from '/etc/strongswan/ipsec.d/acerts' 00[CFG] loading crls from '/etc/strongswan/ipsec.d/crls' 00[CFG] loading secrets from '/etc/strongswan/ipsec.secrets' 00[CFG] loaded RSA private key from '/etc/strongswan/ipsec.d/private/clientKey.pem' 00[CFG] loaded IKE secret for %any 00[CFG] loaded EAP secret for android 00[CFG] loaded EAP secret for android 00[DMN] loaded plugins: charon aes des sha1 sha2 md5 random nonce x509 revocation constraints pubkey pkcs1 pkcs8 pgp dnskey pem openssl fips-prf gmp xcbc cmac hmac attr kernel-netlink resolve socket-default stroke updown xauth-generic 08[NET] waiting for data on sockets 16[LIB] created thread 16 [15338] 16[JOB] started worker thread 16 11[CFG] received stroke: add connection 'android-hybrid' 11[CFG] conn android-hybrid 11[CFG] left=%any 11[CFG] leftsubnet=(null) 11[CFG] leftsourceip=(null) 11[CFG] leftauth=pubkey 11[CFG] leftauth2=(null) 11[CFG] leftid=(null) 11[CFG] leftid2=(null) 11[CFG] leftrsakey=(null) 11[CFG] leftcert=serverCert.pem 11[CFG] leftcert2=(null) 11[CFG] leftca=(null) 11[CFG] leftca2=(null) 11[CFG] leftgroups=(null) 11[CFG] leftupdown=ipsec _updown iptables 11[CFG] right=%any 11[CFG] rightsubnet=(null) 11[CFG] rightsourceip=96.244.142.3 11[CFG] rightauth=xauth 11[CFG] rightauth2=(null) 11[CFG] rightid=%any 11[CFG] rightid2=(null) 11[CFG] rightrsakey=(null) 11[CFG] rightcert=(null) 11[CFG] rightcert2=(null) 11[CFG] rightca=(null) 11[CFG] rightca2=(null) 11[CFG] rightgroups=(null) 11[CFG] rightupdown=(null) 11[CFG] eap_identity=(null) 11[CFG] aaa_identity=(null) 11[CFG] xauth_identity=(null) 11[CFG] ike=aes256-sha1-modp1024 11[CFG] esp=aes128-sha1-modp2048,3des-sha1-modp1536 11[CFG] dpddelay=30 11[CFG] dpdtimeout=150 11[CFG] dpdaction=0 11[CFG] closeaction=0 11[CFG] mediation=no 11[CFG] mediated_by=(null) 11[CFG] me_peerid=(null) 11[CFG] keyexchange=ikev1 11[KNL] getting interface name for %any 11[KNL] %any is not a local address 11[KNL] getting interface name for %any 11[KNL] %any is not a local address 11[CFG] left nor right host is our side, assuming left=local 11[CFG] loaded certificate "C=CH, O=strongSwan, CN=vpn.strongswan.org" from 'serverCert.pem' 11[CFG] id '%any' not confirmed by certificate, defaulting to 'C=CH, O=strongSwan, CN=vpn.strongswan.org' 11[CFG] added configuration 'android-hybrid' 11[CFG] adding virtual IP address pool 'android-hybrid': 96.244.142.3/32 13[CFG] received stroke: add connection 'android2' 13[CFG] conn android2 13[CFG] left=96.244.142.28 13[CFG] leftsubnet=0.0.0.0/0 13[CFG] leftsourceip=(null) 13[CFG] leftauth=pubkey 13[CFG] leftauth2=(null) 13[CFG] leftid=(null) 13[CFG] leftid2=(null) 13[CFG] leftrsakey=(null) 13[CFG] leftcert=serverCert.pem 13[CFG] leftcert2=(null) 13[CFG] leftca=(null) 13[CFG] leftca2=(null) 13[CFG] leftgroups=(null) 13[CFG] leftupdown=ipsec _updown iptables 13[CFG] right=%any 13[CFG] rightsubnet=10.0.0.0/24 13[CFG] rightsourceip=10.0.0.2 13[CFG] rightauth=pubkey 13[CFG] rightauth2=xauth 13[CFG] rightid=(null) 13[CFG] rightid2=(null) 13[CFG] rightrsakey=(null) 13[CFG] rightcert=clientCert.pem 13[CFG] rightcert2=(null) 13[CFG] rightca=(null) 13[CFG] rightca2=(null) 13[CFG] rightgroups=(null) 13[CFG] rightupdown=(null) 13[CFG] eap_identity=(null) 13[CFG] aaa_identity=(null) 13[CFG] xauth_identity=(null) 13[CFG] ike=aes256-sha1-modp1024 13[CFG] esp=aes128-sha1-modp2048,3des-sha1-modp1536 13[CFG] dpddelay=30 13[CFG] dpdtimeout=150 13[CFG] dpdaction=0 13[CFG] closeaction=0 13[CFG] mediation=no 13[CFG] mediated_by=(null) 13[CFG] me_peerid=(null) 13[CFG] keyexchange=ikev0 13[KNL] getting interface name for %any 13[KNL] %any is not a local address 13[KNL] getting interface name for 96.244.142.28 13[KNL] 96.244.142.28 is on interface em1 13[CFG] loaded certificate "C=CH, O=strongSwan, CN=vpn.strongswan.org" from 'serverCert.pem' 13[CFG] id '96.244.142.28' not confirmed by certificate, defaulting to 'C=CH, O=strongSwan, CN=vpn.strongswan.org' 13[CFG] loaded certificate "C=CH, O=strongSwan, CN=client" from 'clientCert.pem' 13[CFG] id '%any' not confirmed by certificate, defaulting to 'C=CH, O=strongSwan, CN=client' 13[CFG] added configuration 'android2' 13[CFG] adding virtual IP address pool 'android2': 10.0.0.2/32 08[NET] received packet: from 208.54.35.241[32235] to 96.244.142.28[500] 15[CFG] looking for an ike config for 96.244.142.28...208.54.35.241 15[CFG] candidate: %any...%any, prio 2 15[CFG] candidate: 96.244.142.28...%any, prio 5 15[CFG] found matching ike config: 96.244.142.28...%any with prio 5 01[JOB] next event in 29s 999ms, waiting 15[IKE] received NAT-T (RFC 3947) vendor ID 15[IKE] received draft-ietf-ipsec-nat-t-ike-02 vendor ID 15[IKE] received draft-ietf-ipsec-nat-t-ike-02\n vendor ID 15[IKE] received draft-ietf-ipsec-nat-t-ike-00 vendor ID 15[IKE] received XAuth vendor ID 15[IKE] received Cisco Unity vendor ID 15[IKE] received DPD vendor ID 15[IKE] 208.54.35.241 is initiating a Main Mode IKE_SA 15[IKE] IKE_SA (unnamed)[1] state change: CREATED => CONNECTING 15[CFG] selecting proposal: 15[CFG] proposal matches 15[CFG] received proposals: IKE:AES_CBC_256/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_1024, IKE:AES_CBC_256/HMAC_MD5_96/PRF_HMAC_MD5/MODP_1024, IKE:AES_CBC_128/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_1024, IKE:AES_CBC_128/HMAC_MD5_96/PRF_HMAC_MD5/MODP_1024, IKE:3DES_CBC/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_1024, IKE:3DES_CBC/HMAC_MD5_96/PRF_HMAC_MD5/MODP_1024, IKE:DES_CBC/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_1024, IKE:DES_CBC/HMAC_MD5_96/PRF_HMAC_MD5/MODP_1024 15[CFG] configured proposals: IKE:AES_CBC_256/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_1024, IKE:AES_CBC_128/AES_CBC_192/AES_CBC_256/3DES_CBC/CAMELLIA_CBC_128/CAMELLIA_CBC_192/CAMELLIA_CBC_256/HMAC_MD5_96/HMAC_SHA1_96/HMAC_SHA2_256_128/HMAC_SHA2_384_192/HMAC_SHA2_512_256/AES_XCBC_96/AES_CMAC_96/PRF_HMAC_MD5/PRF_HMAC_SHA1/PRF_HMAC_SHA2_256/PRF_HMAC_SHA2_384/PRF_HMAC_SHA2_512/PRF_AES128_XCBC/PRF_AES128_CMAC/MODP_2048/MODP_2048_224/MODP_2048_256/MODP_1536/MODP_4096/MODP_8192/MODP_1024/MODP_1024_160 15[CFG] selected proposal: IKE:AES_CBC_256/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_1024 15[NET] sending packet: from 96.244.142.28[500] to 208.54.35.241[32235] 04[NET] sending packet: from 96.244.142.28[500] to 208.54.35.241[32235] 15[MGR] checkin IKE_SA (unnamed)[1] 15[MGR] check-in of IKE_SA successful. 08[NET] received packet: from 208.54.35.241[32235] to 96.244.142.28[500] 08[NET] waiting for data on sockets 07[MGR] checkout IKE_SA by message 07[MGR] IKE_SA (unnamed)[1] successfully checked out 07[NET] received packet: from 208.54.35.241[32235] to 96.244.142.28[500] 07[LIB] size of DH secret exponent: 1023 bits 07[IKE] remote host is behind NAT 07[IKE] sending cert request for "C=CH, O=strongSwan, CN=strongSwan CA" 07[ENC] generating NAT_D_V1 payload finished 07[NET] sending packet: from 96.244.142.28[500] to 208.54.35.241[32235] 07[MGR] checkin IKE_SA (unnamed)[1] 07[MGR] check-in of IKE_SA successful. 04[NET] sending packet: from 96.244.142.28[500] to 208.54.35.241[32235] 08[NET] received packet: from 208.54.35.241[35595] to 96.244.142.28[4500] 10[IKE] ignoring certificate request without data 10[IKE] received end entity cert "C=CH, O=strongSwan, CN=client" 10[CFG] looking for XAuthInitRSA peer configs matching 96.244.142.28...208.54.35.241[C=CH, O=strongSwan, CN=client] 10[CFG] candidate "android-hybrid", match: 1/1/2/2 (me/other/ike/version) 10[CFG] candidate "android2", match: 1/20/5/1 (me/other/ike/version) 10[CFG] selected peer config "android2" 10[CFG] certificate "C=CH, O=strongSwan, CN=client" key: 2048 bit RSA 10[CFG] using trusted ca certificate "C=CH, O=strongSwan, CN=strongSwan CA" 10[CFG] checking certificate status of "C=CH, O=strongSwan, CN=client" 10[CFG] ocsp check skipped, no ocsp found 10[CFG] certificate status is not available 10[CFG] certificate "C=CH, O=strongSwan, CN=strongSwan CA" key: 2048 bit RSA 10[CFG] reached self-signed root ca with a path length of 0 10[CFG] using trusted certificate "C=CH, O=strongSwan, CN=client" 10[IKE] authentication of 'C=CH, O=strongSwan, CN=client' with RSA successful 10[ENC] added payload of type ID_V1 to message 10[ENC] added payload of type SIGNATURE_V1 to message 10[IKE] authentication of 'C=CH, O=strongSwan, CN=vpn.strongswan.org' (myself) successful 10[IKE] queueing XAUTH task 10[IKE] sending end entity cert "C=CH, O=strongSwan, CN=vpn.strongswan.org" 10[NET] sending packet: from 96.244.142.28[4500] to 208.54.35.241[35595] 04[NET] sending packet: from 96.244.142.28[4500] to 208.54.35.241[35595] 10[IKE] activating new tasks 10[IKE] activating XAUTH task 10[NET] sending packet: from 96.244.142.28[4500] to 208.54.35.241[35595] 04[NET] sending packet: from 96.244.142.28[4500] to 208.54.35.241[35595] 01[JOB] next event in 3s 999ms, waiting 10[MGR] checkin IKE_SA android2[1] 10[MGR] check-in of IKE_SA successful. 08[NET] received packet: from 208.54.35.241[35595] to 96.244.142.28[4500] 08[NET] waiting for data on sockets 12[MGR] checkout IKE_SA by message 12[MGR] IKE_SA android2[1] successfully checked out 12[NET] received packet: from 208.54.35.241[35595] to 96.244.142.28[4500] 12[MGR] checkin IKE_SA android2[1] 12[MGR] check-in of IKE_SA successful. 08[NET] received packet: from 208.54.35.241[35595] to 96.244.142.28[4500] 16[MGR] checkout IKE_SA by message 16[MGR] IKE_SA android2[1] successfully checked out 16[NET] received packet: from 208.54.35.241[35595] to 96.244.142.28[4500] 08[NET] waiting for data on sockets 16[IKE] XAuth authentication of 'android' successful 16[IKE] reinitiating already active tasks 16[IKE] XAUTH task 16[NET] sending packet: from 96.244.142.28[4500] to 208.54.35.241[35595] 04[NET] sending packet: from 96.244.142.28[4500] to 208.54.35.241[35595] 16[MGR] checkin IKE_SA android2[1] 01[JOB] next event in 3s 907ms, waiting 16[MGR] check-in of IKE_SA successful. 08[NET] received packet: from 208.54.35.241[35595] to 96.244.142.28[4500] 09[MGR] checkout IKE_SA by message 09[MGR] IKE_SA android2[1] successfully checked out 09[NET] received packet: from 208.54.35.241[35595] to 96.244.142.28[4500] .8rS 09[IKE] IKE_SA android2[1] established between 96.244.142.28[C=CH, O=strongSwan, CN=vpn.strongswan.org]...208.54.35.241[C=CH, O=strongSwan, CN=client] 09[IKE] IKE_SA android2[1] state change: CONNECTING => ESTABLISHED 09[IKE] scheduling reauthentication in 3409s 09[IKE] maximum IKE_SA lifetime 3589s 09[IKE] activating new tasks 09[IKE] nothing to initiate 09[MGR] checkin IKE_SA android2[1] 09[MGR] check-in of IKE_SA successful. 09[MGR] checkout IKE_SA 09[MGR] IKE_SA android2[1] successfully checked out 09[MGR] checkin IKE_SA android2[1] 09[MGR] check-in of IKE_SA successful. 01[JOB] next event in 3s 854ms, waiting 08[NET] waiting for data on sockets 08[NET] received packet: from 208.54.35.241[35595] to 96.244.142.28[4500] 14[MGR] checkout IKE_SA by message 14[MGR] IKE_SA android2[1] successfully checked out 14[NET] received packet: from 208.54.35.241[35595] to 96.244.142.28[4500] 14[IKE] processing INTERNAL_IP4_ADDRESS attribute 14[IKE] processing INTERNAL_IP4_NETMASK attribute 14[IKE] processing INTERNAL_IP4_DNS attribute 14[IKE] processing INTERNAL_IP4_NBNS attribute 14[IKE] processing UNITY_BANNER attribute 14[IKE] processing UNITY_DEF_DOMAIN attribute 14[IKE] processing UNITY_SPLITDNS_NAME attribute 14[IKE] processing UNITY_SPLIT_INCLUDE attribute 14[IKE] processing UNITY_LOCAL_LAN attribute 14[IKE] processing APPLICATION_VERSION attribute 14[IKE] peer requested virtual IP %any 14[CFG] assigning new lease to 'android' 14[IKE] assigning virtual IP 10.0.0.2 to peer 'android' 14[NET] sending packet: from 96.244.142.28[4500] to 208.54.35.241[35595] 14[MGR] checkin IKE_SA android2[1] 14[MGR] check-in of IKE_SA successful. 04[NET] sending packet: from 96.244.142.28[4500] to 208.54.35.241[35595] 08[NET] waiting for data on sockets 01[JOB] got event, queuing job for execution 01[JOB] next event in 91ms, waiting 13[MGR] checkout IKE_SA 13[MGR] IKE_SA android2[1] successfully checked out 13[MGR] checkin IKE_SA android2[1] 13[MGR] check-in of IKE_SA successful. 01[JOB] got event, queuing job for execution 01[JOB] next event in 24s 136ms, waiting 15[MGR] checkout IKE_SA 15[MGR] IKE_SA android2[1] successfully checked out 15[MGR] checkin IKE_SA android2[1] 15[MGR] check-in of IKE_SA successful.

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• How to mix textures in DirectX?

  - by tobsen

  I am new to DirectX development and I am wondering if I am taking the wrong route to achieve the following: I would like to mix three textures which contain transparent areas and some solid areas (Red, Blue, Green). The three textures should blend like shown in this example: How can I achieve that in DirectX (preferably in directx9)? A link or example code would be nice. Update: My rendering method looks like this and I still think I am doing it wrong, because the sprite only shows the last texture (nothing is rendered transparent or blended): void D3DTester::render() { d3ddevice->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0,0,0), 1.0f, 0); d3ddevice->BeginScene(); d3ddevice->SetRenderState(D3DRS_ALPHABLENDENABLE, TRUE); d3ddevice->SetRenderState(D3DRS_SRCBLEND, D3DBLEND_ONE); d3ddevice->SetRenderState(D3DRS_DESTBLEND, D3DBLEND_ONE); LPD3DXSPRITE sprite=NULL; HRESULT hres = D3DXCreateSprite(d3ddevice, &sprite); if(hres != S_OK) { throw std::exception(); } sprite->Begin(D3DXSPRITE_ALPHABLEND); std::vector<LPDIRECT3DTEXTURE9>::iterator it; for ( it=textures.begin() ; it < textures.end(); it++ ) { sprite->Draw(*it, NULL, NULL, NULL, 0xFFFFFFFF); } sprite->End(); d3ddevice->EndScene(); d3ddevice->Present(NULL, NULL, NULL, NULL); } The resulting image looks like this: But I need it to look like this instead: Update2: I figured out that I have to SetRenderState after I use sprite->Begin(D3DXSPRITE_ALPHABLEND); thanks to the hint by Josh Petrie. However, by using this: sprite->Begin(D3DXSPRITE_ALPHABLEND); d3ddevice->SetRenderState(D3DRS_ALPHABLENDENABLE, TRUE); d3ddevice->SetRenderState(D3DRS_SRCBLEND, D3DBLEND_ONE); d3ddevice->SetRenderState(D3DRS_DESTBLEND, D3DBLEND_ONE); std::vector<LPDIRECT3DTEXTURE9>::iterator it; for ( it=textures.begin() ; it < textures.end(); it++ ) { sprite->Draw(*it, NULL, NULL, NULL, 0xFFFFFFFF); } sprite->End(); The sprites colors are becoming transparent towards the background scene e.g.: if I use d3ddevice->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0,100,21), 1.0f, 0); the result looks like: Is there any way to avoid that? I would like the sprites be transparent to each other but to be still solid to the background. Update3: After having sombody explained to me, how to do what @LaurentCouvidou and @JoshPetrie suggested, I have a working solution and therfore accept the answer: d3ddevice->BeginScene(); D3DCOLOR white = D3DCOLOR_RGBA((UINT)255, (UINT)255, (UINT)255, 255); D3DCOLOR black = D3DCOLOR_RGBA((UINT)0, (UINT)0, (UINT)0, 255); sprite->Begin(D3DXSPRITE_ALPHABLEND); sprite->Draw(pTextureRed, NULL, NULL, NULL, black); sprite->Draw(pTextureGreen, NULL, NULL, NULL, black); sprite->Draw(pTextureBlue, NULL, NULL, NULL, black); sprite->End(); sprite->Begin(D3DXSPRITE_ALPHABLEND); d3ddevice->SetRenderState(D3DRS_ALPHATESTENABLE, TRUE); d3ddevice->SetRenderState(D3DRS_BLENDOP, D3DBLENDOP_ADD); d3ddevice->SetRenderState(D3DRS_SRCBLEND, D3DBLEND_ONE); d3ddevice->SetRenderState(D3DRS_DESTBLEND, D3DBLEND_ONE); sprite->Draw(pTextureRed, NULL, NULL, NULL, white); sprite->Draw(pTextureGreen, NULL, NULL, NULL, white); sprite->Draw(pTextureBlue, NULL, NULL, NULL, white); sprite->End(); d3ddevice->EndScene(); d3ddevice->Present(NULL, NULL, NULL, NULL);

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• Reportviewer stored procedure [closed]

  - by Liesl

  I want to write a stored procedure for my invoice reportviewer. After invoice is generated in reportviewer it must also add the data to my Invoice table. This is all my tables in my database: CREATE TABLE [dbo].[Waybills]( [WaybillID] [int] IDENTITY(1,1) NOT NULL, [SenderName] [varchar](50) NULL, [SenderAddress] [varchar](50) NULL, [SenderContact] [int] NULL, [ReceiverName] [varchar](50) NULL, [ReceiverAddress] [varchar](50) NULL, [ReceiverContact] [int] NULL, [UnitDescription] [varchar](50) NULL, [UnitWeight] [int] NULL, [DateReceived] [date] NULL, [Payee] [varchar](50) NULL, [CustomerID] [int] NULL, PRIMARY KEY CLUSTERED CREATE TABLE [dbo].[Customer]( [CustomerID] [int] IDENTITY(1,1) NOT NULL, [customerName] [varchar](30) NULL, [CustomerAddress] [varchar](30) NULL, [CustomerContact] [varchar](30) NULL, [VatNo] [int] NULL, CONSTRAINT [PK_Customer] PRIMARY KEY CLUSTERED ) CREATE TABLE [dbo].[Cycle]( [CycleID] [int] IDENTITY(1,1) NOT NULL, [CycleNumber] [int] NULL, [StartDate] [date] NULL, [EndDate] [date] NULL ) ON [PRIMARY] CREATE TABLE [dbo].[Payments]( [PaymentID] [int] IDENTITY(1,1) NOT NULL, [Amount] [money] NULL, [PaymentDate] [date] NULL, [CustomerID] [int] NULL, PRIMARY KEY CLUSTERED Create table Invoices ( InvoiceID int IDENTITY(1,1), InvoiceNumber int, InvoiceDate date, BalanceBroughtForward money, OutstandingAmount money, CustomerID int, WaybillID int, PaymentID int, CycleID int PRIMARY KEY (InvoiceID), FOREIGN KEY (CustomerID) REFERENCES Customer(CustomerID), FOREIGN KEY (WaybillID) REFERENCES Waybills(WaybillID), FOREIGN KEY (PaymentID) REFERENCES Payments(PaymentID), FOREIGN KEY (CycleID) REFERENCES Cycle(CycleID) ) I want my sp to find all waybills for specific customer in a specific cycle with payments made from this client. All this data must then be added into the INVOICE table. Can someone please help me or show me on the right direction? create proc GenerateInvoice @StartDate date, @EndDate date, @Payee varchar(30) AS SELECT Waybills.WaybillNumber Waybills.SenderName, Waybills.SenderAddress, Waybills.SenderContact, Waybills.ReceiverName, Waybills.ReceiverAddress, Waybills.ReceiverContact, Waybills.UnitDescription, Waybills.UnitWeight, Waybills.DateReceived, Waybills.Payee, Payments.Amount, Payments.PaymentDate, Cycle.CycleNumber, Cycle.StartDate, Cycle.EndDate FROM Waybills CROSS JOIN Payments CROSS JOIN Cycle WHERE Waybills.ReceiverName = @Payee AND (Waybills.DateReceived BETWEEN (@StartDate) AND (@EndDate)) Insert Into Invoices (InvoiceNumber, InvoiceDate, BalanceBroughtForward, OutstandingAmount) Values (@InvoiceNumber, @InvoiceDate, @BalanceBroughtForward, @ OutstandingAmount) go

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• In C#, what happens when you call an extension method on a null object?

  - by tpower

  Does the method get called with a null value or does it give a null reference exception? MyObject myObject = null; myObject.MyExtensionMethod(); // <-- is this a null reference exception? If this is the case I will never need to check my 'this' parameter for null?

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• AND is better or using Internal "IF"

  - by BDotA

  In a situation like this:" if ((metadata != null) && (metadata.TypeEnum != VariantInfoMetadata.CellTypeEnum.Status)) do you recommend to keep the code as it is above or do you think it is better to make an internal "if" statement and brake that AND into two sections where "outer if" makes sure metadata is not null and inner if does the rest of the checking. I think this way will take care of possible null refrence exception if value of metadata gets null?

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• Using macro to check null values [migrated]

  - by poliron

  My C code contains many functions with pointers to different structs as parameteres which shouldn't be NULL pointers. To make my code more readable, I decided to replace this code: if(arg1==NULL || arg2==NULL || arg3==NULL...) { return SOME_ERROR; } With that macro: NULL_CHECK(arg1,arg2,...) How should I write it, if the number of args is unknown and they can point to different structs?(I work in C99)

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• DIR $file "File Not Found" vs DIR $filedir shows it....not permissions, not USB

  - by Kev

  I was having this problem before on a USB drive, but now it's happening on my main RAID5-backed hard disk: 2013-10-17 9:37 C:\>dir "C:\Shares\Shared\Reference\Safety Management System\Vid eo CD\AutoPlay\Docs\Manuel*" Volume in drive C has no label. Volume Serial Number is 3C18-E114 Directory of C:\Shares\Shared\Reference\Safety Management System\Video CD\AutoP lay\Docs 2003-09-09 11:29 PM 1,056,768 Manuel d'intervention d'urgence MFC.doc 2004-06-20 10:36 PM 139,849 Manuel d'intervention d'urgence MFC.pdf 2 File(s) 1,196,617 bytes 0 Dir(s) 196,068,691,968 bytes free 2013-10-17 9:38 C:\>dir "C:\Shares\Shared\Reference\Safety Management System\Vid eo CD\AutoPlay\Docs\Manuel d'intervention d'urgence MFC.doc" Volume in drive C has no label. Volume Serial Number is 3C18-E114 Directory of C:\Shares\Shared\Reference\Safety Management System\Video CD\AutoP lay\Docs File Not Found 2013-10-17 9:38 C:\> This is from a Command Prompt window where I went to Properties and told it I wanted to modify who it ran as. I opened it, had it run as me with the "restricted access" unchecked, then ran the above. The file in question has the following ACLs: Administrators, SYSTEM, and OurCompanyUsers. All three have full control of everything. Nobody has any Deny bits set. I am a member of Administrators. So I don't believe it's a permissions issue. It's not a USB drive, so this time there is no question of USB hardware. Windows Server 2003 Standard Edition SP2. What does this mean? Is this more likely a hardware or software problem?

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