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Javascript: How to check if a string is empty? [duplicate]

I know this is really basic, but I am new to javascript and can't find an answer anywhere. 5 Answers ...
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HTTP response code for POST when resource already exists

... My feeling is 409 Conflict is the most appropriate, however, seldom seen in the wild of course: The request could not be completed due to a conflict with the current state of the resource. This code is only allowed in situations where ...
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Why is i++ not atomic?

Why is i++ not atomic in Java? 9 Answers 9 ...
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Why does Maven have such a bad rep? [closed]

There is a lot of talk on the internet about how Maven is bad. I have been using some features of Maven for a few years now and the most important benefit in my view is the dependency management. ...
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How do I check if an element is hidden in jQuery?

Is it possible to toggle the visibility of an element, using the functions .hide() , .show() or .toggle() ? 59 Answers ...
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How to detect if my shell script is running through a pipe?

How do I detect from within a shell script if its standard output is being sent to a terminal or if it's piped to another process? ...
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Why '&&' and not '&'?

Why is && preferable to & and || preferable to | ? 16 Answers 16 ...
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Volatile Vs Atomic [duplicate]

... The effect of the volatile keyword is approximately that each individual read or write operation on that variable is atomic. Notably, however, an operation that requires more than one read/write -- such as i++, which is equivalent to i = i + 1, which does one...
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How do I use the ternary operator ( ? : ) in PHP as a shorthand for “if / else”?

Based on the examples from this page , I have the working and non-working code samples below. 14 Answers ...
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What is the meaning of the term “thread-safe”?

... From Wikipedia: Thread safety is a computer programming concept applicable in the context of multi-threaded programs. A piece of code is thread-safe if it functions correctly during simultaneous execution by multiple threads. In particular, it must satisf...