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Convert data.frame columns from factors to characters

I have a data frame. Let's call him bob : 18 Answers 18 ...
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What is the most efficient Java Collections library? [closed]

What is the most efficient Java Collections library? 12 Answers 12 ...
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How To Set A JS object property name from a variable

I am in need to set a JS object property name dynamically. 8 Answers 8 ...
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How do I bind a WPF DataGrid to a variable number of columns?

My WPF application generates sets of data which may have a different number of columns each time. Included in the output is a description of each column that will be used to apply formatting. A simplified version of the output might be something like: ...
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jQuery event handlers always execute in order they were bound - any way around this? [duplicate]

It can be anoying that jQuery event handlers always execute in the order they were bound. For example: 10 Answers ...
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DLL and LIB files - what and why?

I know very little about DLL's and LIB's other than that they contain vital code required for a program to run properly - libraries. But why do compilers generate them at all? Wouldn't it be easier to just include all the code in a single executable? And what's the difference between DLL's and LIB's...
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Why do you not use C for your web apps?

I was having a look at a few different web servers this morning when I came across G-WAN . As I understand, its a web server written in C and you have to make use of it by writing your websites/webapps in C. One clear benefit is speed as the G-WAN site suggests. ...
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Split a string by another string in C#

I've been using the Split() method to split strings, but this only appears to work if you are splitting a string by a character. Is there a way to split a string , with another string being the split by parameter? ...
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Programmatically align a toolbar on top of the iPhone keyboard

In several cases I want to add a toolbar to the top of the iPhone keyboard (as in iPhone Safari when you're navigating form elements, for example). ...
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How to implement a tree data-structure in Java? [closed]

Is there any standard Java library class to represent a tree in Java? 24 Answers 24 ...