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How can I check if a value is a json object?

My server side code returns a value which is a json object on success and a string 'false' on failure. Now how can I check whether the returned value is a json object? ...
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What does placing a @ in front of a C# variable name do? [duplicate]

I've been working with some C# legacy code and I've been seeing a lot of @ symbols in front of variable names. What does this signify or do? ...
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Tags for Emacs: Relationship between etags, ebrowse, cscope, GNU Global and exuberant ctags

I work on C++ projects, and I went through Alex Ott's guide to CEDET and other threads about tags in StackOverflow, but I am still confused about how Emacs interfaces with these different tag systems to facilitate autocompletion, the looking up of definitions, navigation of source code base or the...
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How do I read the contents of a Node.js stream into a string variable?

I'm hacking on a Node program that uses smtp-protocol to capture SMTP emails and act on the mail data. The library provides the mail data as a stream, and I don't know how to get that into a string. ...
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Vertex shader vs Fragment Shader [duplicate]

I've read some tutorials regarding Cg, yet one thing is not quite clear to me. What exactly is the difference between vertex and fragment shaders? And for what situations is one better suited than the other? ...
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How to determine equality for two JavaScript objects?

A strict equality operator will tell you if two object types are equal. However, is there a way to tell if two objects are equal, much like the hash code value in Java? ...
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How to get a reversed list view on a list in Java?

I want to have a reversed list view on a list (in a similar way than List#sublist provides a sublist view on a list). Is there some function which provides this functionality? ...
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Why use a prime number in hashCode?

I was just wondering why is that primes are used in a class's hashCode() method? For example, when using Eclipse to generate my hashCode() method there is always the prime number 31 used: ...
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What is the difference between 'E', 'T', and '?' for Java generics?

I come across Java code like this: 6 Answers 6 ...
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How to highlight cell if value duplicate in same column for google spreadsheet?

I am looking for formula for google spreadsheet highlight cell if value duplicate in same column 6 Answers ...