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How to check if a string is a valid JSON string in JavaScript without using Try/Catch

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Changing every value in a hash in Ruby

I want to change every value in a hash so as to add '%' before and after the value so 11 Answers ...
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What are the most-used vim commands/keypresses?

I'm a Ruby programming trying to switch from Textmate to MacVim, and I'm having trouble wading through the gargantuan lists of things you can do in VIM and all of the keypresses for them. I'm tired of hearing "You can use 'I' for inserting text, or 'a' for appending text after the character, or 'A' ...
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Constructor of an abstract class in C#

Why is it possible to write constructor for an abstract class in C#? As far as I know we can't instantiate an abstract class.. so what is it for? You can't instantiate the class, right? ...
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Visual Studio Solutions Folder as real Folders

I have a Visual Studio Solution. Currently, it is an empty solution (=no projects) and I have added a few solution folders. ...
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What is the meaning of the 'g' flag in regular expressions?

What is the meaning of the g flag in regular expressions? 9 Answers 9 ...
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What exactly does the .join() method do?

I'm pretty new to Python and am completely confused by .join() which I have read is the preferred method for concatenating strings. ...
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How do I load a file into the python console?

I have some lines of python code that I'm continuously copying/pasting into the python console. Is there a load command or something I can run? e.g. load file.py ...
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IOCTL Linux device driver [closed]

Can anyone explain me, 2 Answers 2 ...
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Can I change a private readonly field in C# using reflection?

I am wondering, since a lot of things can be done using reflection, can I change a private readonly field after the constructor completed its execution? (note: just curiosity) ...