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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...
CSS filter: make color image with transparency white
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You can use
filter: brightness(0) invert(1);
html {
background: red;
}
p {
float: left;
max-width: 50%;
text-align: center;
}
img {
display: block;
max-width: 100%;
}
.filter {
-webkit-filter: brightness(0) invert(1);
filter: brig...
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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How do I search for an object by its ObjectId in the mongo console?
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12 Answers
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What does flushing the buffer mean?
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123
Consider writing to a file. This is an expensive operation. If in your code you write one byte...
Generating random numbers in Objective-C
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13 Answers
13
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How do I get the last day of a month?
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10 Answers
10
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