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Create an index on a huge MySQL production table without table locking
I need to create an index on a ~5M rows MySQL table. It is a production table, and I fear a complete block of everything if I run a CREATE INDEX statement...
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How to open a file using the open with statement
...urn.)
Using multiple open() items with with was not supported in Python 2.5 when the with statement was introduced, or in Python 2.6, but it is supported in Python 2.7 and Python 3.1 or newer.
http://docs.python.org/reference/compound_stmts.html#the-with-statement
http://docs.python.org/release/3....
:after vs. ::after
... right.
Actually, better description here: http://bricss.net/post/10768584657/know-your-lingo-pseudo-class-vs-pseudo-element
Also here: http://www.evotech.net/blog/2007/05/after-v-after-what-is-double-colon-notation/
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.NET Process.Start default directory?
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edited Feb 23 '15 at 18:42
umlcat
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Target elements with multiple classes, within one rule
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185
.border-blue.background { ... } is for one item with multiple classes.
.border-blue, .background...
API Keys vs HTTP Authentication vs OAuth in a RESTful API
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SidSid
6,9592424 silver badges3939 bronze badges
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How to set an environment variable only for the duration of the script?
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125
VAR1=value1 VAR2=value2 myScript args ...
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Database cluster and load balancing
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edited Jul 22 '09 at 5:57
answered Jul 22 '09 at 5:44
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Format a datetime into a string with milliseconds
...Y-%m-%d %H:%M:%S.%f')[:-3]
>>>> OUTPUT >>>>
2020-05-04 10:18:32.926
Note: For Python3, print requires parentheses:
print(datetime.utcnow().strftime('%Y-%m-%d %H:%M:%S.%f')[:-3])
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