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Python `if x is not None` or `if not x is None`?
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There's no performance difference, as they compile to the same bytecode:
Python 2.6.2 (r262:7...
Wrapping null-returning method in Java with Option in Scala?
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RoToRaRoToRa
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add a com...
RegEx: Smallest possible match or nongreedy match
... without matching unless absolutely necessary, use something like (?:blah){0,1}?. For a repeating match (either using {n,} or {n,m} syntax) append a question mark to try to match as few as possible (e.g. {3,}? or {5,7}?).
The documentation on regular expression quantifiers may also be helpful.
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How do you rename a table in SQLite 3.0?
How do you rename a table in SQLite 3.0?
2 Answers
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jQuery equivalent of JavaScript's addEventListener method
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edited Jul 30 '14 at 18:30
answered Mar 7 '10 at 22:25
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Clear Text Selection with JavaScript
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answered Jul 3 '10 at 0:46
Gert GrenanderGert Grenander
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Python regex find all overlapping matches?
I'm trying to find every 10 digit series of numbers within a larger series of numbers using re in Python 2.6.
3 Answers
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add column to mysql table if it does not exist
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Note that INFORMATION_SCHEMA isn't supported in MySQL prior to 5.0. Nor are stored procedures supported prior to 5.0, so if you need to support MySQL 4.1, this solution isn't good.
One solution used by frameworks that use database migrations is to record in your database a revision numbe...
How do you move a commit to the staging area in git?
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edited Apr 27 '18 at 21:09
Neuron
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answered Aug...
How to get commit history for just one branch?
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Adam Rosenfield
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answered Jun 7 '13 at 0:06
alexalex
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