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  • Better alternative to autonumber primary keys

    - by Comrad_Durandal
    I am looking for a better primary key than the autonumber data type, namely for the reason that it's limited to a long integer, when I really just need the field to reflect a number or text string that will never ever repeat, no matter HOW many records are added or deleted from the table. The problem is I am not sure how to implement something like turning the current date and time into a hexadecimal string and using that as a unique field I can use as a primary key. Am I just being too paranoid about running out of space?

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  • RSA PKCS1 implementation in Python

    - by user307016
    I'm working on the RSA PKCS1 implementation in Python,here's the message block i got: m = [0,2,random paddings,0,message integers] I read the RFC2313,and get a equation seems for transforming the message block object into an big-edian integer. I just get confused about how to transform it in Python. Any help would be appreciated.

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  • Cross platform millisecond timer lasting more than 49 days?

    - by Cetra
    Hey guys, I'm going to be developing a small dedicated server in C/C++ that will require uptime of forever. I've been looking into some time functions as millisecond timing is required for calculations. I have 2 problems that I'm facing: Using a 32bit integer to store the number of milliseconds since the operation began will wrap around at about the 49 days mark resetting to zero. There doesn't seem to be any standard system calls for getting elapsed milliseconds that are platform independant What should I do to resolve both these issues?

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  • Cast value from NSNotification's object

    - by E-Madd
    How can I cast the object in a NSNotification to an integer and to a string? When I log the notification to the console I get... NSConcreteNotification 0x20af70 {name = kMessageCountNotification; object = 1} But when I set the text value of a UILabel to that value, I get 72855952

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  • How can I store large amount of data from a database to XML (speed problem, part three)?

    - by Andrija
    After getting some responses, the current situation is that I'm using this tip: http://www.ibm.com/developerworks/xml/library/x-tipbigdoc5.html (Listing 1. Turning ResultSets into XML), and XMLWriter for Java from http://www.megginson.com/downloads/ . Basically, it reads date from the database and writes them to a file as characters, using column names to create opening and closing tags. While doing so, I need to make two changes to the input stream, namely to the dates and numbers. // Iterate over the set while (rs.next()) { w.startElement("row"); for (int i = 0; i < count; i++) { Object ob = rs.getObject(i + 1); if (rs.wasNull()) { ob = null; } String colName = meta.getColumnLabel(i + 1); if (ob != null ) { if (ob instanceof Timestamp) { w.dataElement(colName, Util.formatDate((Timestamp)ob, dateFormat)); } else if (ob instanceof BigDecimal){ w.dataElement(colName, Util.transformToHTML(new Integer(((BigDecimal)ob).intValue()))); } else { w.dataElement(colName, ob.toString()); } } else { w.emptyElement(colName); } } w.endElement("row"); } The SQL that gets the results has the to_number command (e.g. to_number(sif.ID) ID ) and the to_date command (e.g. TO_DATE (sif.datum_do, 'DD.MM.RRRR') datum_do). The problems are that the returning date is a timestamp, meaning I don't get 14.02.2010 but rather 14.02.2010 00:00:000 so I have to format it to the dd.mm.yyyy format. The second problem are the numbers; for some reason, they are in database as varchar2 and can have leading zeroes that need to be stripped; I'm guessing I could do that in my SQL with the trim function so the Util.transformToHTML is unnecessary (for clarification, here's the method): public static String transformToHTML(Integer number) { String result = ""; try { result = number.toString(); } catch (Exception e) {} return result; } What I'd like to know is a) Can I get the date in the format I want and skip additional processing thus shortening the processing time? b) Is there a better way to do this? We're talking about XML files that are in the 50 MB - 250 MB filesize category.

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  • Should I worry about running out of HierarchyIDs?

    - by Bruno Martinez
    When you ask for a new HierarchyID between two others, the result gets progressively longer. For example, between 2/5.6 and 2/5.7 there's only 2/5.6.1 and other 4 component paths. The HierarchyID data type is limited to 800 some bytes, so you can't repeat this forever. Then again, integer types are also limited, but it isn't a problem in practice. Should I periodically defragment my table so that height doesn't grow unbounded?

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  • wchar to char in c++

    - by Chris
    I have a Windows CE console application that's entry point looks like this int _tmain(int argc, _TCHAR* argv[]) I want to check the contents of argv[1] for "-s" convert argv[2] into an integer. I am having trouble narrowing the arguments or accessing them to test. I initially tried the following with little success if (argv[1] == L"-s") I also tried using the narrow function of wostringstream on each character but this crashed the application. Can anyone shed some light? Thanks

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  • How get datetime column in sqlite objecite-c

    - by Undolog
    Hi, How do you get a datetime column in sqlite objective-c ? I have a table with 4 fields: pk, datetime, value1 and value 2. pk (primary key), value1 and value2 are integer so I am using: int value1 = sqlite3_column_int(statement, 2); int value1 = sqlite3_column_int(statement, 3); But what should I used for datetime? Thx

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  • Sqlite3 and PDO problem with ORDER BY

    - by Maenny
    Hi, I try to use the SQL statement SELECT * FROM table ORDER BY column via an PDO-Object in PHP. Problem is, that I always get an error (Call to a member function fetchall() on a non-object - that means, the query did not return a PDO-object) when using the names of all columnname EXCEPT for ID. When I query SELECT * FROM table ORDER BY ID it works. ID is the PRIMARY INTEGER KEY, all other columns are TEXT or NUMERIC, neither of them would works with the ORDER BY clause. Any ideas?

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  • Assigning int to byte in java?

    - by user303218
    int val =233; byte b = (byte)val; System.out.println(b); I have a simple case, like one integer with some value & i want to convert that value & place in the byte type for output. But in this case negative value is coming? How to successfully place the int value to byte type.

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  • Importing data from file to array

    - by stamp
    I have 2 dimensional table in file, which look like this: 11, 12, 13, 14, 15 21, 22, 23, 24, 25 I want it to be imported in 2 dimensional array. I wrote this code: INTEGER :: SMALL(10) DO I = 1, 3 READ(UNIT=10, FMT='(5I4)') SMALL WRITE(UNIT=*, FMT='(6X,5I4)') SMALL ENDDO But it imports everything in one dimensional array.

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  • Ordering sql query results

    - by user343409
    My sql query gives the columns: product_id (which is an integer) pnl (which is float - can be negative) I get more than 100 rows. I want to filter out the top 40 rows based on abs(pnl). But the results should be ordered by pnl column only and not by abs(pnl). I want to do this for MSSQL 2005. Is there a way to do this?

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  • Why are there differing definitions of INT64_MIN? And why do they behave differently?

    - by abelenky
    The stdint.h header at my company reads: #define INT64_MIN -9223372036854775808LL But in some code in my project, a programmer wrote: #undef INT64_MIN #define INT64_MIN (-9223372036854775807LL -1) He then uses this definition in the code. The project compiles with no warnings/errors. When I attempted to remove his definition and use the default one, I got: error: integer constant is so large that it is unsigned The two definitions appear to be equivalent. Why does one compile fine and the other fails?

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  • Retrieve Value from NSString

    - by Taimur Hamza
    Hi, i have a NSString instance ,i want to retrieve value from it and store it into an integer. This is wat i am doing but its not working. NSString *totalcnt; char *str = totalcnt; int a = atoi(str); Help me out. Thanks Taimur

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  • HTML Aligning Text

    - by nevillejones
    I want to display text on a page like in the following way: My Text: Text Here My Text: More Text Here......................................................... Text from line above continued here. I have the following markup just to test: <html> <head> <style type="text/css"> body { font-family: arial; } form div { padding: 3px; } form .label { float: left; text-align: right; width: 150px; margin-right: 8px; } </style> </head> <body> <form> <div class="label">My Text:</div> <div>Aenean tellus diam, pharetra sed posuere sed, ullamcorper eget enim. Suspendisse quis posuere nisi. Integer sodales neque id erat luctus suscipit. Curabitur in nisi arcu. Curabitur suscipit tellus non lectus blandit non mollis risus aliquet. Proin et felis nulla. Integer ut felis nibh, eu condimentum elit. Sed tincidunt fermentum lorem, convallis ornare ipsum mattis sed. Vestibulum vel quam sed velit condimentum volutpat eu sed enim. Duis tincidunt, turpis id suscipit molestie, erat tortor tincidunt augue, eu venenatis erat neque nec nisi. Nunc malesuada bibendum elit eu bibendum.</div> <div class="label">My Text 2:</div> <div>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nulla suscipit arcu ut risus dapibus tincidunt et ut orci. Vestibulum vitae urna in ligula fringilla facilisis aliquet vel nisl. Quisque placerat risus eget arcu fermentum at consectetur arcu lobortis. In hac habitasse platea dictumst. In in libero non justo pellentesque cursus quis non nisi. Donec sit amet pharetra ipsum. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Nulla enim enim, fringilla vitae sodales id, ultrices non lacus. Etiam id augue ut dui convallis hendrerit. Vivamus urna justo, dignissim in suscipit eu, facilisis a libero. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. .</div> </form> </body> When this is rendered about half the text is displayed underneath the corresponding "label" class div. I would like all the text to be appear to the right of the "label" div.

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  • implicit declaration of function 'objc_lookUpClass'

    - by idober
    I am getting this warning for the line code: Class myClass = objc_lookUpClass([_className UTF8String]); I am adding #import <Foundation/NSObjCRuntime.h> #import <objc/objc.h> And it still don't resolve the problem Another warning i get on this line is: "Initialization makes pointer from integer without a cast"

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  • what's wrong with this code?

    - by user329820
    Hi this is my code which will not work correctly ! what is wrong with its data type :( thanks CREATE TABLE T1 (A INTEGER NOT NULL); CREATE TABLE T3 (A SMALLINT NOT NULL); INSERT T1 VALUES (32768.5); SELECT * FROM T1; INSERT T3 SELECT * FROM T1; SELECT * FROM T3;

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  • Copy List of Structures to Excel Range

    - by KDP
    Does anyone know how to copy a VB.Net list of structures to an Excel range? It's not hard to do with an array, but I can't get a list of structures to work. Example: Structure MyStruct Dim MyField1 as String Dim MyField2 as Integer End Structure Dim MyList As New List(Of MyStruct) ...populate list of structures... Dim rng as Excel.Range = MySheet.Range("A1","B9") rng.??? = MyList '*** This is where I get stuck. ***

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  • postgresql insert value in table in serial value

    - by Jesse Siu
    my database using postgresql. the table pk is uing serial value.if i want to insert a record in table, do i need type pk or it will automatic contain id. Can you give me a example about how to insert a record in dataset CREATE TABLE dataset ( id serial NOT NULL, age integer NOT NULL, name character varying(32) NOT NULL, description text NOT NULL DEFAULT ''::text CONSTRAINT dataset_pkey PRIMARY KEY (id ) )

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  • Delphi To Java code conversion: image.canvas.pixels

    - by Mattl
    I'm trying to convert an old Delphi program I wrote into Java to compile and run on my Android phone. I'm running the Android 2.1 operating system but am using version 1.6 of the SDK. I have a routine in Delphi where I set the colour of pixels on a canvas individually along the lines of: image1.canvas.pixels[x, y] := GetMyTColor(x, y); Is there a Java equivalent to the property on the Canvas: property Pixels[X, Y: Integer]: TColor

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  • Ruby complex validation

    - by pcasa
    Have a product that belongs to a category. Want to create a promotion for a short period of time (lets say a week or two), but their can be only one promotion per category during that time. How can I create a custom validation for this? product class belongs_to :categories name:string desc:text reg_price:decimal category_id:integer promo_active:boolean promo_price:decimal promo_start:datetime promo_end:datetime end category class has_many :products name:string end

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