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  • any equivalent to VB.net function name as return value in C#?

    - by user1179861
    In vb.net there is a weird approach that you can use the function name as the result variable.. example: Function Foo(ByVal bar As Integer) As List(Of Integer) Foo = New List(Of Integer) Foo.Add(bar + 1) End Function As far as i know, in C# you have to: List<int> foo(int bar) { var result = new List<int>(); result.Add(bar + 1); return result; } I'm not sure if it's by design or i just don't know the right way to do this.. Please enlight me! Thanks in advance, Eitan.

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  • Function pointers to member functions

    - by Jacob
    There are several duplicates of this but nobody explains why I can use a member variable to store the pointer (in FOO) but when I try it with a local variable (in the commented portion of BAR), it's illegal. Could anybody explain this? #include <iostream> using namespace std; class FOO { public: int (FOO::*fptr)(int a, int b); int add_stuff(int a, int b) { return a+b; } void call_adder(int a, int b) { fptr = &FOO::add_stuff; cout<<(this->*fptr)(a,b)<<endl; } }; class BAR { public: int add_stuff(int a, int b) { return a+b; } void call_adder(int a, int b) { //int (BAR::*fptr)(int a, int b); //fptr = &BAR::add_stuff; //cout<<(*fptr)(a,b)<<endl; } }; int main() { FOO test; test.call_adder(10,20); return 0; }

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  • Python interpreter invocation with "-c" and indentation issues

    - by alexander
    I'm trying to invoke Python using the "-c" argument to allow me to run some arbitrary python code easily, like this: python.exe -c "for idx in range(10): print idx" Now this code works fine, from within my batch file, however, I'm running into problems when I want to do anything more than this. Consider the following Python code: foo = 'bar' for idx in range(10): print idx this would then give you 0-9 on the stdout. However, if I collapse this into a single line, using semicolons as delimiters, to get the following: foo = 'bar';for idx in range(10): print idx and try to run it using python.exe -c it get a SyntaxError raised: C:\Python>python.exe -c "foo = 'bar';for idx in range(10): print idx" File "<string>", line 1 foo = 'bar';for idx in range(10): print idx ^ SyntaxError: invalid syntax Anyone know how I can actually use this without switching to a separate .py file?

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  • Why is 'using' improving C# performances

    - by Wernight
    It seems that in most cases the C# compiler could call Dispose() automatically. Like most cases of the using pattern look like: public void SomeMethod() { ... using (var foo = new Foo()) { ... } // Foo isn't use after here (obviously). ... } Since foo isn't used (that's a very simple detection) and since its not provided as argument to another method (that's a supposition that applies to many use cases and can be extended), the compiler could automatically call Dispose() without the developper requiring to do it. This means that in most cases the using is pretty useless if the compiler does some smart job. IDisposable seem low level enough to me to be taken in account by a compiler. Now why isn't this done? Wouldn't that improve the performances (if the developpers are... dirty).

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  • mod_rewrite: remove trailing slash (only one!)

    - by tshabalala
    Hello. I use mod_rewrite/.htaccess for pretty URLs. I'm using this condition/rule to eliminate trailing slashes (or rather: rewrite to the non-trailing-slash-URL, by a 301 redirect; I'm doing this to avoid duplicate content and because I like URLs with no trailing slashes better): RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{HTTP_HOST} !^\.localhost$ [NC] RewriteRule ^(.+)/$ http://%{HTTP_HOST}/$1 [R=301,L] Working well so far. Only drawback: it also forwards "multiple-trailing-slash"-URLs to non-trailing-slash-URLs. Example: http://example.tld/foo/bar////// forwards to http://example.tld/foo/bar while I only want http://example.tld/foo/bar/ to forward to http://example.tld/foo/bar. So, is it possible to only eliminate trailing slashes if it's actually just one trailing slash? Sorry if this is a somewhat annoying or weird question! Thanks.

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  • Template meta-programming with member function pointers?

    - by wheaties
    Is it possible to use member function pointers with template meta-programming? Such as: class Connection{ public: string getName() const; string getAlias() const; //more stuff }; typedef string (Connection::*Con_Func)() const; template<Con_Func _Name> class Foo{ Connection m_Connect; public: void Foo(){ cout << m_Connect.(*_Name); } }; typedef Foo<&Connection::getName> NamedFoo; typedef Foo<&Connection::getAlias> AliasFoo; Granted, this is rather contrived but is it possible? (yes, there are probably much better ways but humor me.)

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  • Optimizing simple search script in PowerShell

    - by cc0
    I need to create a script to search through just below a million files of text, code, etc. to find matches and then output all hits on a particular string pattern to a CSV file. So far I made this; $location = 'C:\Work*' $arr = "foo", "bar" #Where "foo" and "bar" are string patterns I want to search for (separately) for($i=0;$i -lt $arr.length; $i++) { Get-ChildItem $location -recurse | select-string -pattern $($arr[$i]) | select-object Path | Export-Csv "C:\Work\Results\$($arr[$i]).txt" } This returns to me a CSV file named "foo.txt" with a list of all files with the word "foo" in it, and a file named "bar.txt" with a list of all files containing the word "bar". Is there any way anyone can think of to optimize this script to make it work faster? Or ideas on how to make an entirely different, but equivalent script that just works faster? All input appreciated!

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  • Python - what's your conventions to declare your attributes in a class ?

    - by SeyZ
    Hello, In Python, I can declare attributes all over the class. For example : class Foo: def __init__(self): self.a = 0 def foo(self): self.b = 0 It's difficult to retrieve all attributes in my class when I have a big class with a lot of attributes. Is it better to have the following code (a) or the next following code (b) : a) Here, it's difficult to locate all attributes : class Foo: def __init__(self): foo_1() foo_2() def foo_1(self): self.a = 0 self.b = 0 def foo_2(self): self.c = 0 b) Here, it's easy to locate all attributes but is it beautiful ? class Foo: def __init__(self): (self.a, self.b) = foo_1() self.c = foo_2() def foo_1(self): a = 0 b = 0 return (a, b) def foo_2(self): c = 0 return c In a nutshell, what is your conventions to declare your attributes in a class ?

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  • Question about JSON?

    - by Alex
    Hi all, I have a fairly simple question: In Javascript how can I return the boolean (if its found in the JSON) rather than the actual value? Example: var myJSON = { "foo" : "bar", "bar" : "foo" }; var keyToLookFor = "foo"; var found = myJSON[keyToLookFor]; if (found) { // I know I can test if the string exists in the if } // but is there a way I could just return something like: return found; // instead of testing found in the if statement and then returning true?

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  • LINQ to Entites: How should I handle System.InvalidOperationException when checking for existance of

    - by chris
    I have a many-to-one relationship that users can edit via checkboxes. PK of Foo is ID, and fid contains the id from the checkbox. I'm checking to see if an element exists with: Foo ent; try { ent = ctx.Foo.First(f => f.ID == fid); } catch (System.InvalidOperationException ioe) { ent = new Foo(); } It seems to me that I should be able to do this without throwing an exception. What would be the best way to do this?

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  • Pushing elements into array as copy

    - by koko
    In prototypejs, why does the following code remove the matching divs from the #test div? What confuses me is that this happens when they are being inserted in the #droparea, and not when they are being pushed in the array. <div id="test"> <div class="foo" id="22.1234"> 1 </div> <div class="foo" id="22.1235"> 2 </div> <div class="foo" id="53.2345"> 3 </div> <div class="foo" id="53.2346"> 4 </div> </div> <div id="droparea"> </div> js var elArray = []; var els = $('test').select('.foo'); els.each(function(x){ if(x.id.split('.')[0] == 22){ elArray.push(x); } }); elArray.each(function(y){ $('droparea').insert({ bottom: y }); });

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  • How can I use Linq to create an array of dictionaries from XML?

    - by Duke
    Given the following XML structure: <courses> <course> <title>foo</title> <description>bar</description> </course> ... </courses> How could I create an array of dictionaries such that each dictionary contains all the element/value pairs within a course? What I have right now generates an array whose elements contain a single key/value dictionary for each element/value pair in a course: XElement x = XElement.Parse("...xml string..."); var foo = (from n in x.Elements() select n) .Elements().ToDictionary(y => y.Name, y => y.Value); Produces: [0] => {[course, foo]} [1] => {[description, bar]} What I'd like is this: [0] => {[course, foo], [description, bar]}

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  • Drupal Multisite - Subdirectory, Shared Hosting

    - by derekerdmann
    I'm trying to set up Drupal multisite in a shared hosting environment. The main site's location looks like http://www.mysite.com/foo/bar/ and my goal is to create another site using the same database at http://www.mysite.com/foo/bar/drupal2. I've created a new folder in the sites directory called www.mysite.com.foo.bar.drupal2 and added the default.settings.php and settings.php files, configured correctly for the environment, and I've set up a symlink from the main site's root to the subdirectory, with this command: ln -s . drupal2 The problem is that when I go to http://www.mysite.com/foo/bar/drupal2, I just get the main site at http://www.mysite.com without triggering the installer. What do I need to change to get the multisite working?

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  • pre_replace multi-dimensional array problem

    - by Martin
    I want to replace word groups by links. I use a multi-dimensional array to define these (in the real world there will be thousands of them). Here's the code: $text = "<html><body><pre> Here is Foo in text. Now come Baz? and Bar-X. Replace nothing here: Foo (followed by brackets). </pre></body></html>"; $s = array( array("t" => "Foo", "u" => "http://www.foo.com", "c" => "foo"), array("t" => "Baz?", "u" => "http://www.baz.net", "c" => "test"), array("t" => "Bar-X", "u" => "http://www.baz.org", "c" => "test") ); foreach ($s as $i => $row) { $replaced = preg_replace('/(?=\Q'.$row["t"].'\E[^(]+$)\b\Q'.$row["t"].'\E\b/m', '<a href="'.$row["u"].'" class="'.$row["c"].'">'.$row["t"].'</a>', $text); } echo $replaced; ?> The problem is that only one array element is replaced and not all. It's something about $text in peg_replace(). Anyone got a hint for me? Thanks!

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  • Editing/Modifying a .java file programmatically? (not the .class file)

    - by Jay
    So, here is a piece of code using CodeModel that generates java code: JCodeModel cm = new JCodeModel(); JDefinedClass dc = cm._class("foo.Bar"); JMethod m = dc.method(0, int.class, "foo"); m.body()._return(JExpr.lit(5)); File f = new File("C:/target/classes"); f.mkdirs(); cm.build(f); This code generates a .java file: package foo; public class Bar { int foo() { return 5; } } However, I DO NOT want CodeModel to create a new java file for me. I do have a .java file already and would like to add a few lines of code to a method inside it. So, I would like the API to modify the java file directly/ create a modified copy of it. Is there a way to doing this?

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  • Why is IE8 on XP not properly reading from XML using JQuery?

    - by dking
    Given this XML in data.xml <?xml version="1.0" encoding="utf-8"?> <data> <bar>100</bar> </data> I want to display the content from the "bar" element using the following code in test.html <html> <head> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script> </head> <body> <script type="text/javascript"> $.get('data.xml', function(xml) { var foo = $(xml).find('bar').text(); document.write("<span>foo: [" + foo + "]</span>"); }); </script> </body> </html> The output in webkit based browsers: foo: [100] The output in IE8 on XP: foo: [] Why do webkit browsers read the element's content correctly while IE8 interprets it as an empty string?

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  • How do you calculate div and mod of floating point numbers?

    - by boost
    In Perl, the % operator seems to assume integers. For instance: sub foo { my $n1 = shift; my $n2 = shift; print "perl's mod=" . $n1 % $n2, "\n"; my $res = $n1 / $n2; my $t = int($res); print "my div=$t", "\n"; $res = $res - $t; $res = $res * $n2; print "my mod=" . $res . "\n\n"; } foo( 3044.952963, 7.1 ); foo( 3044.952963, -7.1 ); foo( -3044.952963, 7.1 ); foo( -3044.952963, -7.1 ); gives perl's mod=6 my div=428 my mod=6.15296300000033 perl's mod=-1 my div=-428 my mod=6.15296300000033 perl's mod=1 my div=-428 my mod=-6.15296300000033 perl's mod=-6 my div=428 my mod=-6.15296300000033 Now as you can see, I've come up with a "solution" already for calculating div and mod. However, what I don't understand is what effect the sign of each argument should have on the result. Wouldn't the div always be positive, being the number of times n2 fits into n1? How's the arithmetic supposed to work in this situation?

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  • rewrite image URLs

    - by Don
    Hi, I'm writing a Maven plugin that merges CSS files together. So all the CSS files that match /foo/bar/*.css might get merged to /foo/merged.css. A concern is that in a file such as /foo/bar/baz.css there might be a property such as: background: url("images/pic.jpg") So when the file is merged into /foo/merged.css this will need to be changed to background: url("bar/images/pic.jpg") The recalculated URL obviously depends on 3 factors: original URL original CSS file location merged CSS file location Assuming that the original and merged CSS files are both on the same filesystem, is there a general formula (or Java library) that can be used to calculate the new url given these 3 inputs? Thanks, Don

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  • Where do you put your dependencies?

    - by The All Foo
    If I use the dependency injection pattern to remove dependencies they end up some where else. For example, Snippet 1, or what I call Object Maker. I mean you have to instantiate your objects somewhere...so when you move dependency out of one object, you end up putting it another one. I see that this consolidates all my dependencies into one object. Is that the point, to reduce your dependencies so that they all reside in a single ( as close to as possible ) location? Snippet 1 - Object Maker <?php class ObjectMaker { public function makeSignUp() { $DatabaseObject = new Database(); $TextObject = new Text(); $MessageObject = new Message(); $SignUpObject = new ControlSignUp(); $SignUpObject->setObjects($DatabaseObject, $TextObject, $MessageObject); return $SignUpObject; } public function makeSignIn() { $DatabaseObject = new Database(); $TextObject = new Text(); $MessageObject = new Message(); $SignInObject = new ControlSignIn(); $SignInObject->setObjects($DatabaseObject, $TextObject, $MessageObject); return $SignInObject; } public function makeTweet( $DatabaseObject = NULL, $TextObject = NULL, $MessageObject = NULL ) { if( $DatabaseObject == 'small' ) { $DatabaseObject = new Database(); } else if( $DatabaseObject == NULL ) { $DatabaseObject = new Database(); $TextObject = new Text(); $MessageObject = new Message(); } $TweetObject = new ControlTweet(); $TweetObject->setObjects($DatabaseObject, $TextObject, $MessageObject); return $TweetObject; } public function makeBookmark( $DatabaseObject = NULL, $TextObject = NULL, $MessageObject = NULL ) { if( $DatabaseObject == 'small' ) { $DatabaseObject = new Database(); } else if( $DatabaseObject == NULL ) { $DatabaseObject = new Database(); $TextObject = new Text(); $MessageObject = new Message(); } $BookmarkObject = new ControlBookmark(); $BookmarkObject->setObjects($DatabaseObject,$TextObject,$MessageObject); return $BookmarkObject; } }

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  • Is it getting to be time for C# to support compile-time macros?

    - by Robert Rossney
    Thus far, Microsoft's C# team has resisted adding formal compile-time macro capabilities to the language. There are aspects of programming with WPF that seem (to me, at least) to be creating some compelling use cases for macros. Dependency properties, for instance. It would be so nice to just be able to do something like this: [DependencyProperty] public string Foo { get; set; } and have the body of the Foo property and the static FooProperty property be generated automatically at compile time. Or, for another example an attribute like this: [NotifyPropertyChanged] public string Foo { get; set; } that would make the currently-nonexistent preprocessor produce this: private string _Foo; public string Foo { get { return _Foo; } set { _Foo = value; OnPropertyChanged("Foo"); } } You can implement change notification with PostSharp, and really, maybe PostSharp is a better answer to the question. I really don't know. Assuming that you've thought about this more than I have, which if you've thought about it at all you probably have, what do you think? (This is clearly a community wiki question and I've marked it accordingly.)

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  • Perl standard input with argument inside Bash

    - by neversaint
    I want to have such pipe in bash #! /usr/bin/bash cut -f1,2 file1.txt | myperl.pl foo | sort -u Now in myperl.pl it has content like this my $argv = $ARG[0] || "foo"; while (<>) { chomp; if ($argv eq "foo") { # do something with $_ } else { # do another } } But why the Perl script can't recognize the parameter passed through bash? Namely the code break with this message: Can't open foo: No such file or directory at myperl.pl line 15. What the right way to do it so that my Perl script can receive standard input and parameter at the same time?

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