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• What CLR do when compare T with null, and T is a struct?

  - by Fujiy

  private static void SaveOrRemove<T>(string key, T value) { if (value == null) { Console.WriteLine("Remove: " +key); } .... } If I call passing 0 to value: SaveOrRemove("MyKey", 0), the condition (value == null) is false, then CLR dont make a (value == default(T)). What really happens?

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• Preg_match if a string beginns with "00"{number} or "+"{number}

  - by streetparade

  Hy i have to test if a string begins with 00 or with + Say i have the string 0090 or +41 if the string begins with 0090 return true, elseif string begins with +90 replace the + with 00 else return false The last two digits can be from 0-9 How do i do that in php? I hope i could explain my question clear?

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• Java: equivalent to C's strnicmp? (both startsWith and ignoreCase)

  - by Jason S

  String string1 = "abCdefGhijklMnopQrstuvwYz"; String string2 = "ABC"; I had been using string1.startsWith(string2), which would return false in the above example, but now I need to ignore case sensitivity, and there is not a String.startsWithIgnoreCase(). Besides doing string1.toLowerCase.startsWith(string2.toLowerCase()); is there an efficient way to see if string1 starts with string2 in a case-insensitive way?

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• Help me with LINQ to entities query, please

  - by plotnick

  I need to build a query to the entities to get records including: AssetWeapon, PersonOut number of records with IsIn = True, number of records with IsIn = False, name of the month of StartTime, Records should be grouped by AssetWeapon thank you guys!

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• I just learned about C++ functions; can I use if statements on function return values?

  - by Sagistic

  What I am confused on is about the isNumPalindrome() function. It returns a boolean value of either true or false. How am I suppose to use that so I can display if it's a palindrome or not. For ex. if (isNumPalindrome == true) cout << "Your number is a palindrome"; else cout << "your number is not a palindrome."; #include "stdafx.h" int _tmain(int argc, _TCHAR* argv[]) { return 0; } #include <iostream> #include <cmath> using namespace std; int askNumber(); bool isNumPalindrome(); int num, pwr; int main() { askNumber(); return 0; } bool isNumPalindrome() { int pwr = 0; if (num < 10) return true; else { while (num / static_cast<int>(pow(10.0, pwr)) >=10) pwr++; while (num >=10) { int tenTopwr = static_cast<int>(pow(10.0, pwr)); if ((num / tenTopwr) != (num% 10)) return false; else { num = num % tenTopwr; num = num / 10; pwr = pwr-2; } } return true; } } int askNumber() { cout << "Enter an integer in order to determine if it is a palindrome: " ; cin >> num; cout << endl; if(isNumPalindrome(num)) { cout << "It is a palindrome." ; cout << endl; } else { cout << "It is not a palindrome." ; cout << endl; } return num; }

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• Use jQuery to Enable/Disable a Button based on vars

  - by Rylea S.

  Ok so, Im using jQuery to do username and email checks before a signup... this sets a variable true or false depending on the response from php. $(document).ready(function() { if (usr_checked == true) { if (em_checked == true) { $("#registerbttn").removeAttr("disabled"); } } else { $("#registerbttn").attr("disabled", "disabled"); } }); How exactly do i get it to watch those variables live? Thanks :D

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• Is it a good practice to have trim in setter?

  - by zibi

  I'm doing a code review and I noticed such a code: @Entity @Table(name = "SOME_TABLE") public class SomeReportClass { @Column(name = "REPORT_NUMBER", length = 6, nullable = false) private String reportNumber; ..... public String getReportNumber() { return reportNumber; } public void setReportNumber(String reportNumber) { this.reportNumber = StringUtils.trimToNull(reportNumber); } } Every time I see trimming inside of a setter I feel that its not the clearest solution - what is the general practice with that issue?

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• Adding a link using JQuery html() is not click-able on IE6

  - by Abs

  Hello all, I add html to a page using JQuery's html() function. This works great on most browsers except IE6. I can work round this by adding a click event etc but I want to fix the issue without extra tape! Any ideas why this doesn't work on IE6? $('#button_holder').html('<a href="#" onclick="run_activity_upload(); return false;" id="save_button">Upload</a>'); Thanks, Abs

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• Validating alphabetic only string in javascript

  - by Click Upvote

  How can I quickly validate if a string is alphabetic only, e.g var str = "!"; alert(isLetter(str)); // false var str = "a"; alert(isLetter(str)); // true Edit : I would like to add parenthesis i.e () to an exception, so var str = "("; or var str = ")"; should also return true.

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• getting a slide of 'data' returned by $.ajax

  - by Thau

  With $.ajax i'm getting a page dinamicly generated via PHP code, in the HTML returned I need only one object ('lwrapper' in my code). How can I grabber 'lwrapper' from 'data' returned. this is my code $.ajax({ url: ref, //the url cache: false, success: function(data){ //code to get the slide of data //slide = $("lwrapper",data) //not working $('wrapper').html(slide); } });

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• why does twitter use the !function syntax in their embed code

  - by samccone

  I was looking at twitters embed code and saw that they are using !function ... while i know that this evaluates to false I was wondering what the point of it was. thoughts? !function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="//platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs");

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• quiz ; does this compile and if so what does it return (I know the answer)

  - by pm100

  found this typo recently if (name.find('/' != string::npos)) I was amazed that it even compiles at -Wall -Werror (didnt try with -pedantic) so coffee quiz - does it eval to true or false

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• How to find if string contains letters and spaces (php)?

  - by Ole Jak

  So I need to get value false or true if string contains not only letters of all european and east alphabets and " "(space) and "-" minus. How to do such thing with some $a string?

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• [Linq to sql] query result what should i use Count() or Any()...

  - by Pandiya Chendur

  I am checking login of a user by this repository method, public bool getLoginStatus(string emailId, string password) { var query = from r in taxidb.Registrations where (r.EmailId == emailId && r.Password==password) select r; if (query.Count() != 0) { return true; } return false; } I saw in one of the previous questions !query.Any() would be faster... Which should i use? Any suggestion....

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• how to compare two element in jquery

  - by zjm1126

  var a=$('#start > div:last-child'); var b=$('#start > div.live')[0]; alert(a==b) alert(a==$(b)) it always false, how to compare two element in jquery, thanks

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• AS3 - Can I know if a class implements an interface (or is a subclass of another class) ?

  - by lk

  With this code function someFunction(classParam:Class):Boolean { // how to know if classParam implements some interface? } i.e. Comparing classParam with IEventDispatcher interface: someFunction(EventDispatcher) // returns true someFunction(Object) // returns false I know it can't be done with is operator. But, is there a way to do it? Is there a way to know if a class implements some interface? (or is a subclass of another class?)

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• FLEX: Datagrid, how to select an item given my data attribute values

  - by Patrick

  hi, I'm using a custom component CheckBoxList DataGrid (http://blogs.adobe.com/aharui/2008/02/checkbox_selection_in_datagrid.html) and as dataProvider I have an ArrayCollection with items such this one: name="item name" selected="true" I would like the CheckBox list updated when the selected attribute is set to false or true in the data model. thanks

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• jQuery AJAX call working in IE but not FF?

  - by Uma Maheshwar

  $.ajax({ type: "GET", url: 'http://services.somewhere.com/MethodName', data: { 'param1':'something', 'param2': 'somethingElse' }, cache: false, dataType: 'jsonp', contentType: "application/json; charset=utf-8", success: function(view) { alert('success'); }, error: function(xhr, ajaxOptions, thrownError) { alert(xhr.status); alert(xhr.responseText); alert(xhr.statusText); } });

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• Calling an HTML table from code behind

  - by user279521

  Hi, I am trying to access an HTML table from code behind, and set its visible="false" property (depending on what value the user has selected). The table has an id value and a runat=server attribute. How can I call the table from the code behind in C# 2008 and set its display?

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• Prototype with a callback problem

  - by Lisio

  function Foo() { this.bar = false; } Foo.prototype={ onLoad: function() { this.bar=true; }, create: function(id) { SomeClass.someMethod({ id: id, onWorkIsDone: this.onLoad }); } }; var temp=new Foo(); temp.create(); This sample has a logic error in string 'onWorkIsDone: this.onLoad'. What I have to place instead of 'this.onLoad' to make SomeClass call exactly the temp.onLoad method when it finishes it's work?

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• Apache FileUtils listFiles

  - by Marquinio

  Hey everyone I'm trying to get a List of directories. I'm using FileUtils listFiles(). I want to do something like this: listFiles(File,IOFileFilter,false). My real questions is how I can implement the accept() from the IOFileFilter so I can check if current File is a directory? Thank you in advance.

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• Why is this condition never satisfied ?

  - by Patrick

  I don't know why this condition is never satisfied: I'm comparing two ArrayList values, and it is always false. if ( (Integer) results.get(rank) == (Integer) experts.get(j)) I'm debugging and I have exactly the same 2 values: 3043 and 3043 However it doesn't work. thanks

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• Alert box not being called upon button click

  - by user279521

  I have a fairly simple code, a button click event, with the first line being a message box. When the button is clicked, the messagebox is not called. protected void btnSubmitToCRM_Click(object sender, EventArgs e) { ClientScript.RegisterStartupScript(GetType(), "alert", "alert('btnSubmitToCRM_Click - 1');", true); if (!ValidateCoreValue()) { ClientScript.RegisterStartupScript(GetType(), "alert", "alert('btnSubmitToCRM_Click - 1 - False');", true); return; } } Any ideas?

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• Match text only with word characters

  - by Le_Coeur

  Hi, so I want to check if all characters in text are \w or \s if yes then true if even one character isn't \w or \s then false. How can it be done?:)

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• hibernat createSQLQuery use CacheQuery?

  - by cometta

  Query query=getHibernateTemplate().getSessionFactory().getCurrentSession().createSQLQuery( "select... getHibernateTemplate().setCacheQueries(true); List result= query.list(); getHibernateTemplate().setCacheQueries(false); return result; may i know when i do manual "createSQLQuery" how to use cacheQuery? the above doesnt cache the result. show_sql still showing every request get from database

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