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How can I check if a program exists from a Bash script?
...gular commands. Or...
type <the_command> # To check built-ins and keywords
Explanation
Avoid which. Not only is it an external process you're launching for doing very little (meaning builtins like hash, type or command are way cheaper), you can also rely on the builtins to actually do what yo...
Code Wrap IntelliJ?
How would be possible to assign a shortcut for word wrap like as sublime text do? i.e. if the code line is too long it should be automatically break to the next line. wikipedia.org.org/Word_wrap
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How can I safely create a nested directory?
...tsError:
# directory already exists
pass
...and by allowing a keyword argument to os.makedirs called exist_ok (in 3.2+).
os.makedirs("path/to/directory", exist_ok=True) # succeeds even if directory exists.
share...
What is the difference between Left, Right, Outer and Inner Joins?
...e in either table if there is no match.
Often you see will the OUTER keyword omitted from the syntax. Instead it will just be "LEFT JOIN", "RIGHT JOIN", or "FULL JOIN". This is done because INNER and CROSS joins have no meaning with respect to LEFT, RIGHT, or FULL, and so these are sufficient b...
Android: alternate layout xml for landscape mode
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should i have to keep the name layout-land or any other word @marapet
– Vamsi Pavan Mahesh
Jan 12 '14 at 7:30
9
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Regular Expressions- Match Anything
...S]*
[\w\W]*
[\d\D]*
Explanation:
\s: whitespace \S: not whitespace
\w: word \W: not word
\d: digit \D: not digit
(You can exchange the * for + if you want 1 or MORE characters [instead of 0 or more]).
BONUS EDIT:
If you want to match everything on a single line, you can use this:
[^\n]+
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How can I find the location of origin/master in git, and how do I change it?
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I don't understand why people reword questions. It changes the meaning of the question, it makes existing answers make no sense, and it doesn't let other people know that the question asker needs more information based on the fact that their question might ...
Is double square brackets [[ ]] preferable over single square brackets [ ] in Bash?
...tenate multiple commands, ( ) generates subshells unless escaped by \, and word expansion happens as usual.
[[ X ]] is a single construct that makes X be parsed magically. <, &&, || and () are treated specially, and word splitting rules are different.
There are also further differences l...
Limitations of Intel Assembly Syntax Compared to AT&T [closed]
...adable? I find having size suffixes on operands more consise than having "dword". Is there something else I'm missing?
– Hawken
Mar 25 '12 at 14:11
53
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Strip all non-numeric characters from string in JavaScript
...e built-in complements. \d \D (digits versus everything but digits) \w \W (word charcters versus everything but word characters) \s \S (whitespace versus everything but whitespace)
– csj
Dec 7 '09 at 20:38
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