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Test for non-zero length string in Bash: [ -n “$var” ] or [ “$var” ]
...t need to quote the variable expansions inside [[ as there is no danger of word splitting and globbing.
To prevent shellcheck's soft complaints about [[ $var ]] and [[ ! $var ]], we could use the -n option.
Rare cases
In the rare case of us having to make a distinction between "being set to an em...
Should I put #! (shebang) in Python scripts, and what form should it take?
...ws, setuptools can generate wrapper .exe scripts automatically).
In other words, if the script is in a source checkout then you will probably see #!/usr/bin/env python. If it is installed then the shebang is a path to a specific python executable such as #!/usr/local/bin/python (NOTE: you should n...
What is the purpose of the “final” keyword in C++11 for functions?
What is the purpose of the final keyword in C++11 for functions? I understand it prevents function overriding by derived classes, but if this is the case, then isn't it enough to declare as non-virtual your final functions? Is there another thing I'm missing here?
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JavaScript: Check if mouse button down?
...ution, but what if the mouse is coming from a different application say ms word and its dragging some text. How will you detect that the mouse is down?
– Shadrack B. Orina
Apr 11 '12 at 9:40
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What does Html.HiddenFor do?
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@Craig - You're right. I actually though I changed that wording but apparently not.
– Justin Niessner
Oct 6 '10 at 12:33
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Get Slightly Lighter and Darker Color from UIColor
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The function is missing a _ before the word amount. Should be private func hueColorWithBrightnessAmount(_ amount: CGFloat) -> PXColor {
– Codemonk
Apr 17 '18 at 21:16
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When should you use 'friend' in C++?
...l state and data for testing.
Suffice to say I wouldn't use the friend keyword as an essential component of your design.
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How to properly stop the Thread in Java?
...g) and this can give you a hint, that the thread was interrupted. In other words: if you put sleep() in your // do stuff line, then t.interrupt() won't terminate it (well, for 99.9% it won't).
– Cromax
Jun 29 at 22:40
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What does [:] mean?
...e it can be of value to raise dead questions. Different insight, different wording etc. In this case you corrected the answer and they hopefully learnt something too.
– Pryftan
Apr 19 at 15:17
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Ruby class types and case statements
... type Class that describes any object created using MyClass.new). In other words, MyClass.class == Class.
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