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Meaning of tilde in Linux bash (not home directory)
... `dirs +1`
~2 `dirs +2`
~-1 `dirs -1`
dirs and ~1, ~-1, etc., are used in conjunction with pushd and popd.
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follo...
Javascript parseInt() with leading zeros
...aScript treat strings starting with 0 as octal (when no base is specified) and neither 08 nor 09 are valid octal numbers.
From the Mozilla documentation:
If radix is undefined or 0, JavaScript assumes the following:
If the input string begins with "0x" or "0X", radix is 16
(hexadecim...
Git submodule push
...
Yes, and don't forget to pull changes from your synchronized local branch (if any) before pushing. Happens eg. when working with a gh-pages branch for documentation on a github repo :)
– NiKo
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What __init__ and self do on Python?
I'm learning the Python programming language and I've came across something I don't fully understand.
18 Answers
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'AND' vs '&&' as operator
I have a codebase where developers decided to use AND and OR instead of && and || .
10 Answers
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Is there a “null coalescing” operator in JavaScript?
...t now supports the nullish coalescing operator (??). It returns its right-hand-side operand when its left-hand-side operand is null or undefined, and otherwise returns its left-hand-side operand.
Please check compatibility before using it.
The JavaScript equivalent of the C# null coalescing ope...
Catch all JavaScript errors and send them to server
I wondered if anyone had experience in handling JavaScript errors globally and send them from the client browser to a server.
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What do (lambda) function closures capture?
Recently I started playing around with Python and I came around something peculiar in the way closures work. Consider the following code:
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How do you post to an iframe?
...ut if you're using ordinary HTML markup, you're fine. The target attribute and frame names isn't some clever ninja hack; although it was deprecated (and therefore won't validate) in HTML 4 Strict or XHTML 1 Strict, it's been part of HTML since 3.2, it's formally part of HTML5, and it works in just a...
Regex exactly n OR m times
...ou are doing it is fine.
An alternative is:
X{m}(X{k})?
where m < n and k is the value of n-m.
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