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Are negative array indexes allowed in C?

I was just reading some code and found that the person was using arr[-2] to access the 2nd element before the arr , like so: ...
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Function overloading by return type?

Why don't more mainstream statically typed languages support function/method overloading by return type? I can't think of any that do. It seems no less useful or reasonable than supporting overload by parameter type. How come it's so much less popular? ...
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psycopg2: insert multiple rows with one query

I need to insert multiple rows with one query (number of rows is not constant), so I need to execute query like this one: 1...
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How to unset a JavaScript variable?

I have a global variable in JavaScript (actually a window property, but I don't think it matters) which was already populated by a previous script but I don't want another script that will run later to see its value or that it was even defined. ...
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How do you get a string from a MemoryStream?

If I am given a MemoryStream that I know has been populated with a String , how do I get a String back out? 11 Answers...
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Move the mouse pointer to a specific position?

I'm building a HTML5 game and I am trying to put the mouse cursor over a certain control on a specific event so that moving in a specific direction always has the same result. Is this possible? ...
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Convert a Unix timestamp to time in JavaScript

I am storing time in a MySQL database as a Unix timestamp and that gets sent to some JavaScript code. How would I get just the time out of it? ...
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How do I prevent a parent's onclick event from firing when a child anchor is clicked?

I'm currently using jQuery to make a div clickable and in this div I also have anchors. The problem I'm running into is that when I click on an anchor both click events are firing (for the div and the anchor). How do I prevent the div's onclick event from firing when an anchor is clicked? ...
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How do you convert a jQuery object into a string?

How do you convert a jQuery object into a string? 12 Answers 12 ...
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Why does this assert throw a format exception when comparing structures?

I'm trying to assert the equality of two System.Drawing.Size structures, and I'm getting a format exception instead of the expected assert failure. ...