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How to write a bash script that takes optional input arguments?
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You could use the default-value syntax:
somecommand ${1:-foo}
The above will, as described in Bash Reference Manual - 3.5.3 Shell Parameter Expansion [emphasis mine]:
If parameter is unset or null, the expansion of word is substituted. Otherwise, the value of paramet...
How do I use spaces in the Command Prompt?
How can I use spaces in the Windows Command Line?
11 Answers
11
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How can I convert a comma-separated string to an array?
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Short and sweet, nice to see that JavaScript string has some the richness of the Java String.
– Michael Shopsin
May 19 '15 at 15:13
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Case insensitive regular expression without re.compile?
...nk was added in 1.5. Basically since the beginning of time for all intents and purposes when it comes to Python. It's documented about half way through the first section of this page: docs.python.org/2/library/re.html#regular-expression-syntax
– ArtOfWarfare
M...
Check image width and height before upload with Javascript
...ke it you realize this is only supported in a few browsers. Mostly firefox and chrome, could be opera as well by now.
P.S. The URL.createObjectURL() method has been removed from the MediaStream interface. This method has been deprecated in 2013 and superseded by assigning streams to HTMLMediaElemen...
How to implement a good __hash__ function in python [duplicate]
...tiple properties (like in the toy example below), what is the best way to handle hashing?
3 Answers
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`find -name` pattern that matches multiple patterns
I was trying to get a list of all python and html files in a directory with the command find Documents -name "*.{py,html}" .
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SQL SELECT WHERE field contains words
...e present, use this:
SELECT * FROM mytable
WHERE column1 LIKE '%word1%'
AND column1 LIKE '%word2%'
AND column1 LIKE '%word3%'
If you want something faster, you need to look into full text search, and this is very specific for each database type.
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Remove credentials from Git
...th several repositories, but lately I was just working in our internal one and all was great.
35 Answers
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How can I check if my python object is a number? [duplicate]
...0, 0.0, 0j, decimal.Decimal(0))]
[True, True, True, True]
This uses ABCs and will work for all built-in number-like classes, and also for all third-party classes if they are worth their salt (registered as subclasses of the Number ABC).
However, in many cases you shouldn't worry about checking t...