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String concatenation vs. string substitution in Python
...meit.Timer('so_q_sub(1000)','from __main__ import so_q_sub')
>>> t2 = timeit.Timer('so_q_cat(1000)','from __main__ import so_q_cat')
>>> t1.timeit(number=10000000)
12.166618871951641
>>> t2.timeit(number=10000000)
5.7813972166853773
>>> t1.timeit(number=1)
1.10349...
What is the difference between UNION and UNION ALL?
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26 Answers
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How does database indexing work? [closed]
...g on a field that isn’t sorted requires a Linear Search which requires N/2 block accesses (on average), where N is the number of blocks that the table spans. If that field is a non-key field (i.e. doesn’t contain unique entries) then the entire tablespace must be searched at N block accesses.
W...
Git: How to reuse/retain commit messages after 'git reset'?
...ter:
git commit -C HEAD@{1}
You can use the other options given by @user2718704.
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How to get a list of repositories apt-get is checking? [closed]
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edited Jun 18 '12 at 23:03
Ry-♦
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How to run functions in parallel?
...ing'
for i in xrange(10000000): pass
print 'func1: finishing'
def func2():
print 'func2: starting'
for i in xrange(10000000): pass
print 'func2: finishing'
if __name__ == '__main__':
p1 = Process(target=func1)
p1.start()
p2 = Process(target=func2)
p2.start()
p1.join()
p2.join...
Can “list_display” in a Django ModelAdmin display attributes of ForeignKey fields?
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edited Jul 25 '14 at 16:10
Denilson Sá Maia
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Keyboard shortcut to comment lines in Sublime Text 2
In Sublime Text 2 , how do I enclose a selection in a comment ?
Is there a keyboard shortcut for this action?
15 Answer...
What command means “do nothing” in a conditional in Bash?
...s greater than "10", print "1" if $a is less than "5", otherwise, print "2":
3 Answers
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