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How to check if a string is a valid hex color representation?
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/^#[0-9A-F]{6}$/i.test('#AABBCC')
To elaborate:
^ -> match beginning
# -> a hash
[0-9A-F] -> any integer from 0 to 9 and any letter from A to F
{6} -> the previous group appears exactly 6...
Sorting 1 million 8-decimal-digit numbers with 1 MB of RAM
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Modifying a subset of rows in a pandas dataframe
...fy this DataFrame (or create a copy) so that B is always NaN whenever A is 0. How would I achieve that?
5 Answers
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How to validate an email address in PHP
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How to get the primary IP address of the local machine on Linux and OS X? [closed]
... return me the primary (first) IP address of the localhost, other than 127.0.0.1
31 Answers
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How can I convert a DateTime to the number of seconds since 1970?
...ateTime variable to Unix time, ie, the number of seconds since Jan 1st, 1970. It looks like a DateTime is actually implemented as the number of 'ticks' since Jan 1st, 0001.
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Email Address Validation in Android on EditText [duplicate]
...target).
– rciovati
Apr 13 '13 at 9:02
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Elastic Search: how to see the indexed data
...ing on your local machine), open a browser window to:
http://localhost:9200/_plugin/head/
Alternatively, you can just use curl from the command line, eg:
Check the mapping for an index:
curl -XGET 'http://127.0.0.1:9200/my_index/_mapping?pretty=1'
Get some sample docs:
curl -XGET 'http:...
How to output only captured groups with sed?
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answered May 6 '10 at 2:39
Paused until further notice.Paused until further notice.
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How to run crontab job every week on Sunday
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10 Answers
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