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Javascript when to use prototypes

I'd like to understand when it is appropriate to use prototype methods in js. Should they always be used? Or are there cases where using them is not preferred and/or incurs a performance penalty? ...
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What is the best way to detect a mobile device?

Is there a way to detect whether or not a user is using a mobile device in jQuery? Something similar to the CSS @media attribute? I would like to run a different script if the browser is on a handheld device. ...
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Why should eval be avoided in Bash, and what should I use instead?

Time and time again, I see Bash answers on Stack Overflow using eval and the answers get bashed, pun intended, for the use of such an "evil" construct. Why is eval so evil? ...
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What is the difference between public, private, and protected?

When and why should I use public , private , and protected functions and variables inside a class? What is the difference between them? ...
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What does in XML mean?

I often find this strange CDATA tag in XML files: 13 Answers 13 ...
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Why does overflow:hidden not work in a ?

I've got a table cell that I would always like to be a particular width. However, it doesn't work with large strings of unspaced text. Here's a test case: ...
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Managing large binary files with Git

I am looking for opinions of how to handle large binary files on which my source code (web application) is dependent. We are currently discussing several alternatives: ...
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How can I replace every occurrence of a String in a file with PowerShell?

Using PowerShell, I want to replace all exact occurrences of [MYID] in a given file with MyValue . What is the easiest way to do so? ...
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In C++, is it still bad practice to return a vector from a function?

Short version: It's common to return large objects—such as vectors/arrays—in many programming languages. Is this style now acceptable in C++0x if the class has a move constructor, or do C++ programmers consider it weird/ugly/abomination? ...
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How can I suppress all output from a command using Bash?

I have a Bash script that runs a program with parameters. That program outputs some status (doing this, doing that...). There isn't any option for this program to be quiet. How can I prevent the script from displaying anything? ...