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When to use symbols instead of strings in Ruby?

If there are at least two instances of the same string in my script, should I instead use a symbol? 4 Answers ...
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How to get all files under a specific directory in MATLAB?

I need to get all those files under D:\dic and loop over them to further process individually. 8 Answers ...
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How can I use pointers in Java?

I know Java doesn't have pointers, but I heard that Java programs can be created with pointers and that this can be done by the few who are experts in java. Is it true? ...
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How does having a dynamic variable affect performance?

I have a question about the performance of dynamic in C#. I've read dynamic makes the compiler run again, but what does it do? ...
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Can't operator == be applied to generic types in C#?

According to the documentation of the == operator in MSDN , 12 Answers 12 ...
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How to debug a single thread in Visual Studio?

I have a solution with some projects. There are several break-points in different projects. I want to trace the first thread hit one of these break-points and continue tracing that single thread despite of other threads entering the same code-blocks. ...
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How do you add an array to another array in Ruby and not end up with a multi-dimensional result?

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make an html svg object also a clickable link

I have an SVG object in my HTML page and am wrapping it in an anchor so when the svg image is clicked it takes the user to the anchor link. ...
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ConcurrentHashMap vs Synchronized HashMap

What is the difference between using the wrapper class, SynchronizedMap , on a HashMap and ConcurrentHashMap ? 12 Ans...
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Determine font color based on background color

Given a system (a website for instance) that lets a user customize the background color for some section but not the font color (to keep number of options to a minimum), is there a way to programmatically determine if a "light" or "dark" font color is necessary? ...