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How do I remove objects from a JavaScript associative array?

...array with a missing index). When working with instances of Array, if you do not want to create a sparsely populated array - and you usually don't - then you should use Array#splice or Array#pop. Note that the delete operator in JavaScript does not directly free memory. Its purpose is to remove pr...
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How do I UPDATE from a SELECT in SQL Server?

... How do I use an alias in set? update table set a.col1 = b.col2 from table a inner join table2 b on a.id = b.id; Instead I have to use update table set table.col1 = b.col2 from table a inner join table2 b on a.id = b.id; ...
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How do I check for C++11 support?

...nt compiler #endif It is set to 199711L in Visual Studio 2010 SP1, but I do not know if vendors will be so bold to increase it already if they just have (partial) compiler-level support versus a standard C++ library with all the C++11 changes. So Boost's defines mentioned in another answer remain...
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How do I put hint in a asp:textbox

How do I put a hint/placeholder inside a asp:TextBox? When I say a hint I mean some text which disappears when the user clicks on it. Is there a way to achieve the same using html / css? ...
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What exactly do “u” and “r” string flags do, and what are raw string literals?

... form-feeds, and so on. In normal string literals, each backslash must be doubled up to avoid being taken as the start of an escape sequence. This syntax variant exists mostly because the syntax of regular expression patterns is heavy with backslashes (but never at the end, so the "except" clause ...
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How do I get the SharedPreferences from a PreferenceActivity in Android?

...shared preferences can be used by other application components. But if you do not need to share the preferences with other components and want to have activity private preferences you can do that with the help of getPreferences() method of the activity. The getPreference method uses the getSharedPre...
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How should I unit test threaded code?

... Look, there's no easy way to do this. I'm working on a project that is inherently multithreaded. Events come in from the operating system and I have to process them concurrently. The simplest way to deal with testing complex, multithreaded applicati...
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How to find list intersection?

... If order is not important and you don't need to worry about duplicates then you can use set intersection: >>> a = [1,2,3,4,5] >>> b = [1,3,5,6] >>> list(set(a) & set(b)) [1, 3, 5] ...
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Converting a Date object to a calendar object [duplicate]

...Instance(); cal.setTime(date); return cal; } Everything else you are doing is both wrong and unnecessary. BTW, Java Naming conventions suggest that method names start with a lower case letter, so it should be: dateToCalendar or toCalendar (as shown). OK, let's milk your code, shall we? Da...
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Using Rails 3.1, where do you put your “page specific” JavaScript code?

To my understanding, all of your JavaScript gets merged into 1 file. Rails does this by default when it adds //= require_tree . to the bottom of your application.js manifest file. ...