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What does  mean?
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Exclamation(!) turned in to question mark(?) in title field
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101128
What is "?:" notation in JavaScript?
125067
What is "#!' in a script file?
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if(!x) vs if(x==false) in ruby
46395
Is it 100% correct to replace !!someVar with Boolean(someVar)?
70705
What does `!!~` mean in javascript?
98451
Why can't I echo the characters #! in a string in bash?
32293
What's the difference between if(!$variable) and if(isset($variable))?
28734
Why is "a" != "a" in C?