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• Scrapy Could not find spider Error

  - by Nacari

  I have been trying to get a simple spider to run with scrapy, but keep getting the error: Could not find spider for domain:stackexchange.com when I run the code with the expression scrapy-ctl.py crawl stackexchange.com. The spider is as follow: from scrapy.spider import BaseSpider from __future__ import absolute_import class StackExchangeSpider(BaseSpider): domain_name = "stackexchange.com" start_urls = [ "http://www.stackexchange.com/", ] def parse(self, response): filename = response.url.split("/")[-2] open(filename, 'wb').write(response.body) SPIDER = StackExchangeSpider()` Another person posted almost the exact same problem months ago but did not say how they fixed it, http://stackoverflow.com/questions/1806990/scrapy-spider-is-not-working I have been following the turtorial exactly at http://doc.scrapy.org/intro/tutorial.html, and cannot figure out why it is not working.

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• Related objects in reportingviewer 10.0.0.0 give #error

  - by Bart-Jan Poirot

  In my VB.net apps i make use of Linq2SQL and Reportviewer with RDLC reports. With Visual Studio 2010 they upgraded this reportviewer component so you can use the newer RDL specification from 2008. Now I've a problem to show related objects. For example assume you provide an order to the datasource of the report and then you can show something like Fields!Customer.Value.Name where Customer is a related entity. I also got the error in my immediate window: *Warning: The Value expression for the textrun ‘Name_1.Paragraphs[0].TextRuns[0]’ contains an error: The specified operation is not valid. (rsRuntimeErrorInExpression)*

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• Using PIG with Hadoop, how do I regex match parts of text with an unknown number of groups?

  - by lmonson

  I'm using Amazon's elastic map reduce. I have log files that look something like this random text foo="1" more random text foo="2" more text noise foo="1" blah blah blah foo="1" blah blah foo="3" blah blah foo="4" ... How can I write a pig expression to pick out all the numbers in the 'foo' expressions? I prefer tuples that look something like this: (1,2) (1) (1,3,4) I've tried the following: TUPLES = foreach LINES generate FLATTEN(EXTRACT(line,'foo="([0-9]+)"')); But this yields only the first match in each line: (1) (1) (1)

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• Run time error '3075' in Access 2007

  - by Thys

  I am getting the following error when I try to open a report in Access 2007. The code works fine in Access 2003. run time error '3075' Syntax error (missing operator) in query expression '[COUNTRY_ID]=' here is the code giving the error... How could I fix this? Private Sub List25_Click() Combo20.SetFocus 'DoCmd.FindRecord List25.ItemData(List25.ListIndex) Forms![Country Rate Administration].Filter = "[COUNTRY_ID]=" & List25.ItemData(List25.ListIndex) Forms![Country Rate Administration].FilterOn = True End Sub Thansk in advance for your help!

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• Problem with nested lambda expressions.

  - by Lehto

  Hey I'm trying to do a nested lambda expression like to following: textLocalizationTable.Where( z => z.SpokenLanguage.Any( x => x.FromCulture == "en-GB") ).ToList(); but i get the error: Member access 'System.String FromCulture' of 'DomainModel.Entities.SpokenLanguage' not legal on type 'System.Data.Linq.EntitySet`1[DomainModel.Entities.SpokenLanguage]. TextLocalization has this relation to spokenlanguage: [Association(OtherKey = "LocalizationID", ThisKey = "LocalizationID", Storage = "_SpokenLanguage")] private EntitySet<SpokenLanguage> _SpokenLanguage = new EntitySet<SpokenLanguage>(); public EntitySet<SpokenLanguage> SpokenLanguage { set { _SpokenLanguage = value; } get { return _SpokenLanguage; } } Any idea what is wrong?

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• Getting an odd error, MSSQL Query using `WITH` clause

  - by Aren B

  The following query: WITH CteProductLookup(ProductId, oid) AS ( SELECT p.ProductID, p.oid FROM [dbo].[ME_CatalogProducts] p ) SELECT rel.Name as RelationshipName, pl.ProductId as FromProductId, pl2.ProductId as ToProductId FROM ( [dbo].[ME_CatalogRelationships] rel INNER JOIN CteProductLookup pl ON pl.oid = rel.from_oid ) INNER JOIN CteProductLookup pl2 ON pl2.oid = rel.to_oid WHERE rel.Name = 'BundleItem' AND pl.ProductId = 'MX12345'; Is generating this error: Msg 319, Level 15, State 1, Line 5 Incorrect syntax near the keyword 'with'. If this statement is a common table expression, an xmlnamespaces clause or a change tracking context clause, the previous statement must be terminated with a semicolon. On execution only. There are no errors/warnings in the sql statement in the managment studio. Any ideas?

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• jQuery 1.4.x and the @ symbol

  - by David

  I used to use this script for jquery email obfuscation: $(".replaceAt").replaceWith("@"); $(".obfuscate").each(function () { $(this).attr("href", "mailto:"+$(this).text()); }); <a class="obfuscate">name<span class="replaceAt">-AT-</span>server.com</a> But with jQuery 1.4.x, I now get this error: uncaught exception: Syntax error, unrecognized expression: @ Looking this up on the net, it looks like jQuery thinks that the @ is a special character. I tried to "\@" it and a few other things with not luck. I'm not enough of a jQuery ninja to know how to fix this. Any ideas?

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• Scala 2.8: use Java annotation with an array parameter

  - by yournamehere

  I'm trying to implement an JavaEE Session Bean with Scala 2.8. Because it's a Remote Session Bean, i have to annotate it with the following Java Annotation: @Target({ElementType.TYPE}) @Retention(RetentionPolicy.RUNTIME) public @interface Remote { Class[] value() default {}; } I only found this example for scala 2.7. In Scala 2.7, its possible to define the session bean like this: @Remote {val value = Array(classOf[ITest])} class MyEJB ... How can i use this annotation the same way with Scala 2.8? I already tried many different versions, all resulting in "annotation argument needs to be a constant", "illegal start of simple expression". All of these definitions don't work: @Remote{val value = Array(classOf[PersonScalaEJB])} @Remote(val value = Array(classOf[PersonScalaEJB])) @Remote(Array(classOf[PersonScalaEJB]))

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• How to perform a literal match with regex using wildcard

  - by kashif4u

  I am trying to perform literal match with regular expression using wildcard. string utterance = "Show me customer id 19"; string pattern 1 = "*tom*"; string patter 2 = "*customer id [0-9]*"; Desired results: if (Regex.IsMatch(utterance, pattern 1 )) { MATCH NOT FOUND } if (Regex.IsMatch(utterance, pattern 2 )) { MATCH FOUND } I have tried looking for literal match solution/syntax in wildcard but having difficulty. Could you also enlighten me with with an example on possible Pattern Matching Strength algorithm i.e. if code match 90 select? Note: I have table with 100000 records to perform literal matches from user utterances. Thanks in advance.

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• How to calculate unbound column value based on value of bound colum in DatagGridView?

  - by Wodzu

  Hi. I have few columns in my DataGridView, one of them is an unbound column and the DataGridVIew is in VirtualMode. When CellValueNeeded event is called, I want to calculate value of Cells[0] basing on the value of Cells[2] which is in bounded column to the underlaying DataSource. This is how I try to do this: private void dgvItems_CellValueNeeded(object sender, DataGridViewCellValueEventArgs e) { e.Value = dgvItems.CurrentRow.Cells[2].Value * 5; //simplified example } However, I am getting System.StackOverflowException because it seams that call to dgvItems.CurrentRow.Cells[2].Value results in call to another CellValueNeeded event. And so on and so on... However Cells[2] is not an unbound column, so on common sense it should not result in recursive call unless getting value of any column(bound or unbound) firest that event... I can not use here SQL Expression and I can not precalculate e.Value in any SQL call. In real example Cells[2].Value is a key used in HashTable which will return a correct value for the Cells[0] (e.Value). What can I do?

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• Function Pointer from base class

  - by camelord

  Hi there, i need a Function Pointer from a base class. Here is the code: class CActionObjectBase { ... void AddResultStateErrorMessage( const char* pcMessage , ULONG iResultStateCode); ... } CActionObjectCalibration( ): CActionObjectBase() { ... m_Calibration = new CCalibration(&CActionObjectBase::AddResultStateErrorMessage); } class CCalibration { ... CCalibration(void (CActionObjectBase::* AddErrorMessage)(const char*, ULONG )); ... void (CActionObjectBase::* m_AddErrorMessage)(const char*, ULONG ); } Inside CCalibration in a Function occurs the Error. I try to call the Function Pointer like this: if(m_AddErrorMessage) { ... m_AddErrorMessage("bla bla", RSC_FILE_ERROR); } The Problem is, that I cannot compile. The Error Message says something like: error C2064: Expression is no Function, that takes two Arguments. What is wrong? regards camelord

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• Regex to validate SMTP Responses?

  - by Alix Axel

  I'm writing a regular expression that can interactively validate SMTP responses codes, once the SMTP dialog is completed it should pass the following regex (some parentheses added for better readability): ^(220)(250){3,}(354)(250)(221)$ Or with(out) authentication: ^(220)(250)((334){2}(235))?(250){2,}(354)(250)(221)$ I'm trying to do rewrite the above regexes so that I can interactively check if the dialog is going as expected, otherwise politely send a QUIT command and close the connection saving bandwidth and time, but I'm having a hard time writing an optimal regex. So far I've managed to come up with: ^(220(250(334(235(250(354(250(221)?)?)?){0,})?){0,2})?)?$ Which, besides only matching authenticated connections, has some bugs... For instance, it matches: 220250334235250354250221 220250334334235250354250221 I've also tried the following modification: ^(220(250)?)?((334(235)?){2})?(250(354(250(221)?)?)?){0,}$ This one accepts non-authenticated responses but it fails to match 220250334 and wrongly matches 220250334334235250354250221 (at least 2 250 are needed before the 354 response code). Can someone help me out with this? Thanks in advance.

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• (type theoretical) How is ([] ==) [] typed in haskell?

  - by Ingo

  It sounds silly, but I can't get it. Why can the expression [] == [] be typed at all? More specifically, which type (in class Eq) is inferred to the type of list elements? In a ghci session, I see the following: Prelude> :t (==[]) (==[]) :: (Eq [a]) => [a] -> Bool But the constraint Eq [a] implies Eq a also, as is shown here: Prelude> (==[]) ([]::[IO ()]) <interactive>:1:1: No instance for (Eq (IO ())) arising from use of `==' at <interactive>:1:1-2 Probable fix: add an instance declaration for (Eq (IO ())) In the definition of `it': it = (== []) ([] :: [IO ()]) Thus, in []==[], the type checker must assume that the list element is some type a that is in class Eq. But which one? The type of [] is just [a], and this is certainly more general than Eq a = [a].

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• How to use Visual Studio debugger visualizers built against a different framework version?

  - by michielvoo

  I compiled the ExpressionTreeVisualizer project found in the Visual Studio 2010 samples but when I try to use it in a .NET 3.5 project I get the exception below: Could not load file or assembly 'file:///C:\Program Files (x86)\Microsoft\Visual Studio 2010\Common7\Packages\Debugger\Visualizers\ExpressionTreeVisualizer.dll' or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded. The sample project had the TargetFrameworkVersion set to v4.0 and after changing it to v3.5 and building it now works in my project. I changed the source code and project file and rebuilt it so that I now have two expression tree visualizers, one for v3.5 projects and one for v4.0 projects. Is there a better way? Thanks!

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• Copy constructor demo (crashing... case 2)

  - by AKN

  Please have a glance at this program: class CopyCon { public: char *name; CopyCon() { name = new char[20]; name = "Hai";//_tcscpy(name,"Hai"); } CopyCon(const CopyCon &objCopyCon) { name = new char[_tcslen(objCopyCon.name)+1]; _tcscpy(name,objCopyCon.name); } ~CopyCon() { if( name != NULL ) { delete[] name; name = NULL; } } }; int main() { CopyCon obj1; CopyCon obj2(obj1); cout<<obj1.name<<endl; cout<<obj2.name<<endl; } This program crashes on execution. Error: "Expression: _BLOCK_TYPE_IS_VALID(pHead-nBlockUse)" If I assign "Hai" to name using aasignment operator, its crashing. Where as when I use string func _tcscpy to assign "Hai" to name, its working perfectly. Can some one explain why so?

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• Some unclear PHP syntax

  - by serhio

  I am a PHP beginner and saw on the forum this PHP expression: $regex = <<<'END' / ( [\x00-\x7F] # single-byte sequences 0xxxxxxx | [\xC0-\xDF][\x80-\xBF] # double-byte sequences 110xxxxx 10xxxxxx | [\xE0-\xEF][\x80-\xBF]{2} # triple-byte sequences 1110xxxx 10xxxxxx * 2 | [\xF0-\xF7][\x80-\xBF]{3} # quadruple-byte sequence 11110xxx 10xxxxxx * 3 ) | ( [\x80-\xBF] ) # invalid byte in range 10000000 - 10111111 | ( [\xC0-\xFF] ) # invalid byte in range 11000000 - 11111111 /x END; Is this code correct? What do these strange (for me) constructions like <<<, 'END', /, /x, and END; mean? I recieve: Parse error: syntax error, unexpected T_SL in /home/vhosts/mysite.com/public_html/mypage.php on line X Thanks

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• Check for default value of attribute in XPath

  - by iref

  Hi, i have XML schema: <xsd:complexType name="contactsType"> <xsd:sequence> <xsd:element name="contact" type="contactType" minOccurs="0" maxOccurs="unbounded"/> </xsd:sequence> <xsd:attribute name="visible" type="xsd:boolean" default="true"/> </xsd:complexType> and i want to find all contacts which have @visible=true, //contacts[@visible='true'] but this expression doesn' t return nodes without set @visible like this: <contacts /> so i want to know if there is any function in XPath which returns also default values of attributes Thanks Jan

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• Perl Regex Multiple Items in Single String

  - by Sho Minamimoto

  I'm trying to parse a single string and get multiple chunks of data out from the same string with the same regex conditions. I'm parsing a single HTML doc that is static (For an undisclosed reason, I can't use an HTML parser to do the job.) I have an expression that looks like $string =~ /\<img\ssrc\="(.*)"/; and I want to get the value of $1. However, in the one string, there are many img tags like this, so I need something like an array returned (@1?) is this possible?

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• Double-Escaped Unicode Javascript Issue

  - by Jeffrey Winter

  I am having a problem displaying a Javascript string with embedded Unicode character escape sequences (\uXXXX) where the initial "\" character is itself escaped as "&#92;" What do I need to do to transform the string so that it properly evaluates the escape sequences and produces output with the correct Unicode character? For example, I am dealing with input such as: "this is a &#92;u201ctest&#92;u201d"; attempting to decode the "&#92;" using a regex expression, e.g.: var out = text.replace('/&#92;/g','\'); results in the output text: "this is a \u201ctest\u201d"; that is, the Unicode escape sequences are displayed as actual escape sequences, not the double quote characters I would like.

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• C++ Templates: implicit conversion, no matching function for call to ctor

  - by noname

  template<class T> class test { public: test() { } test(T& e) { } }; int main() { test<double> d(4.3); return 0; } Compiled using g++ 4.4.1 with the following errors: g++ test.cpp -Wall -o test.exe test.cpp: In function 'int main()': test.cpp:18: error: no matching function for call to 'test<double>::test(double) ' test.cpp:9: note: candidates are: test<T>::test(T&) [with T = double] test.cpp:5: note: test<T>::test() [with T = double] test.cpp:3: note: test<double>::test(const test<double>&) make: *** [test.exe] Error 1 However, this works: double a=1.1; test<double> d(a); Why is this happing? Is it possible that g++ cannot implicitly convert literal expression 1.1 to double? Thanks.

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• Why does gcc think that I am trying to make a function call in my template function signature?

  - by nieldw

  GCC seem to think that I am trying to make a function call in my template function signature. Can anyone please tell me what is wrong with the following? 227 template<class edgeDecor, class vertexDecor, bool dir> 228 vector<Vertex<edgeDecor,vertexDecor,dir>> Graph<edgeDecor,vertexDecor,dir>::vertices() 229 { 230 return V; 231 }; GCC is giving the following: graph.h:228: error: a function call cannot appear in a constant-expression graph.h:228: error: template argument 3 is invalid graph.h:228: error: template argument 1 is invalid graph.h:228: error: template argument 2 is invalid graph.h:229: error: expected unqualified-id before ‘{’ token Thanks a lot.

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• What logic operator to use, as3?

  - by VideoDnd

  What operator or expression can I use that will fire on every number, including zero? I want a logic operator that will fire with ever number it receives. My animations pause at zero. This skips on zero if (numberThing> 0); This skips on 9 if (numberThing>> 0); This jitters 'fires quickly and goes back on count' if (numberThing== 0); EXPLANATION I'm catching split string values in a logic function, and feeding them to a series of IF, ELSE IF statements. I'm using this with a timer, so I can measure the discrepency. CODE • I GET VALUES FROM TIMER • STRING GOES TO TEXTFIELD 'substr' • NUMBER TRIGGERS TWEENS 'parseInt' • Goes to series of IF and ELSE IF statements

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• Boolean data type size and want to print its value?

  - by Vineet

  I want to know data data type of boolean , i used VSIZE() function but it is not working for boolean and Want to print and store boolean value into table. Please let me know how oracle store boolean value ,is there any other way to see data type and value for boolean variable. ERROR " expression is of wrong type" DECLARE a boolean; b number(7):=7; c number(2):=2; BEGIN a:=bc; select vsize(a) into b from dual; dbms_output.put_line(b); END;

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• Using DateDiff in Entity Framwork on a SQL CE database

  - by deverop

  I have a method which should return a list of anonymous objects with a calculated column like this: var tomorrow = DateTime.Today.AddDays(1); return from t in this.Events where (t.StartTime >= DateTime.Today && t.StartTime < tomorrow && t.EndTime.HasValue) select new { Client = t.Activity.Project.Customer.Name, Project = t.Activity.Project.Name, Task = t.Activity.Task.Name, Rate = t.Activity.Rate.Name, StartTime = t.StartTime, EndTime = t.EndTime.Value, Hours = (System.Data.Objects.SqlClient.SqlFunctions.DateDiff("m", t.StartTime, t.EndTime.Value) / 60), Description = t.Activity.Description }; Unfortunately I get the following error from the DateDiff function: The specified method 'System.Nullable1[System.Int32] DateDiff(System.String, System.Nullable1[System.DateTime], System.Nullable`1[System.DateTime])' on the type 'System.Data.Objects.SqlClient.SqlFunctions' cannot be translated into a LINQ to Entities store expression. Any ideas what I could have done wrong here? EDIT: I also tried the EntityFunctions class mentioned here, but that did not work as well. Minutes = EntityFunctions.DiffMinutes(t.EndTime, t.StartTime),

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• preg_match problem

  - by Biroka

  I'm trying to get some stuff from a string in php. In RegexBuddy and Regular expression tester (firefox addon) it works good, but php gives me the following: Warning: preg_match() [function.preg-match]: Compilation failed: unmatched parentheses at offset 34 in D:\path\example.php on line 62 my pattern is "/.{4}_tmp\\([A-Za-z0-9.\\]*)\(([0-9]*)\) : (.*)/i" an example string: C:\Temp\browseide\projects\32\821C_tmp\SourceFiles\main.c(8) : error C2143: syntax error : missing ';' before 'for' what RegexBuddy gets: 821C_tmp\SourceFiles\main.c(8) : error C2143: syntax error : missing ';' before 'for' Group 1: SourceFiles\main.c Group 2: 8 Group 3: error C2143: syntax error : missing ';' before 'for'

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