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How to change column datatype in SQL database without losing data
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11 Answers
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Why doesn't print work in a lambda?
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A lambda's body has to be a single expression. In Python 2.x, print is a statement. However, i...
Fastest way to convert string to integer in PHP
Using PHP, what's the fastest way to convert a string like this: "123" to an integer?
8 Answers
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How to detect if my shell script is running through a pipe?
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In a pure POSIX shell,
if [ -t 1 ] ; then echo terminal; else echo "not a terminal"; fi
returns "terminal", because the output is sent to your terminal, whereas
(if [ -t 1 ] ; then echo terminal; else echo "not a terminal"; fi) | cat
returns "not a t...
Decimal number regular expression, where digit after decimal is optional
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15 Answers
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What is the meaning of git reset --hard origin/master?
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answered Mar 15 '13 at 12:17
CB BaileyCB Bailey
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Postgres manually alter sequence
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The parentheses are misplaced:
SELECT setval('payments_id_seq', 21, true); # next value will be 22
Otherwise you're calling setval with a single argument, while it requires two or three.
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How to set 'auto' for upper limit, but keep a fixed lower limit with matplotlib.pyplot
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109
You can pass just left or right to set_xlim:
plt.gca().set_xlim(left=0)
For the y axis, use...
Is onload equal to readyState==4 in XMLHttpRequest?
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edited Feb 7 '12 at 18:44
answered Feb 7 '12 at 18:11
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Foreign Key to multiple tables
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154
You have a few options, all varying in "correctness" and ease of use. As always, the right des...