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How to remove spaces from a string using JavaScript?

How to remove spaces in a string? For instance: 7 Answers 7 ...
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Why em instead of px?

I heard you should define sizes and distances in your stylesheet with em instead of in pixels. So the question is why should I use em instead of px when defining styles in css? Is there a good example that illustrates this? ...
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stdlib and colored output in C

I am making a simple application which requires colored output. How can I make my output colored like emacs and bash do? 7 ...
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How to get the last char of a string in PHP?

I need to get the last character of a string. Say I have "testers" as input string and I want the result to be "s". how can I do that in PHP? ...
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What is Double Brace initialization in Java?

What is Double Brace initialization syntax ( {{ ... }} ) in Java? 13 Answers 13 ...
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AngularJS ng-repeat handle empty list case

I thought this would be a very common thing, but I couldn't find how to handle it in AngularJS. Let's say I have a list of events and want to output them with AngularJS, then that's pretty easy: ...
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Factors in R: more than an annoyance?

One of the basic data types in R is factors. In my experience factors are basically a pain and I never use them. I always convert to characters. I feel oddly like I'm missing something. ...
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Why can't I call read() twice on an open file?

For an exercise I'm doing, I'm trying to read the contents of a given file twice using the read() method. Strangely, when I call it the second time, it doesn't seem to return the file content as a string? ...
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Pure virtual function with implementation

My basic understanding is that there is no implementation for a pure virtual function, however, I was told there might be implementation for pure virtual function. ...
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What does the C++ standard state the size of int, long type to be?

I'm looking for detailed information regarding the size of basic C++ types. I know that it depends on the architecture (16 bits, 32 bits, 64 bits) and the compiler. ...