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Learning Regular Expressions [closed]
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[0-9]+ (and its equivalent \d+) matches any non-negative integer
\d{4}-\d{2}-\d{2} matches dates formatted like 2019-01-01
Grouping
A quantifier modifies the pattern to its immediate left. You might expect 0abc+0 to match '0abc0', '0abcabc0', and so forth, but the pattern immediately to the left...
Can I run HTML files directly from GitHub, instead of just viewing their source?
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answered Jun 18 '13 at 22:35
chmaniechmanie
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When does Java's Thread.sleep throw InterruptedException?
...entire paper here:
http://www.ibm.com/developerworks/java/library/j-jtp05236/index.html?ca=drs-
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How to get the position of a character in Python?
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722
There are two string methods for this, find() and index(). The difference between the two is w...
Insert HTML with React Variable Statements (JSX)
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edited May 23 '17 at 10:31
Community♦
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answered May 14 '14 at 19:33
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How do I programmatically determine operating system in Java?
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edited Jul 17 '15 at 23:12
answered Oct 23 '08 at 3:48
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ISO time (ISO 8601) in Python
...O 8601:
import datetime
datetime.datetime.now().isoformat()
>>> 2020-03-20T14:28:23.382748
UTC to ISO 8601:
import datetime
datetime.datetime.utcnow().isoformat()
>>> 2020-03-20T01:30:08.180856
Local to ISO 8601 without microsecond:
import datetime
datetime.datetime.now()...
Detect all Firefox versions in JS
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This will detect any version of Firefox:
var isFirefox = navigator.userAgent.toLowerCase().in...
How do I uniquely identify computers visiting my web site?
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21 Answers
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Meaning of tilde in Linux bash (not home directory)
... $OLDPWD (your previous directory)
~1 `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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