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node.js execute system command synchronously
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answered Feb 8 '15 at 14:13
Benjamin GruenbaumBenjamin Gruenbaum
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Convert a bitmap into a byte array
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answered Sep 8 '11 at 15:43
prestomanifestoprestomanifesto
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PHP session lost after redirect
...session.save_path?
– Justin
Jun 23 '15 at 20:39
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show 12 more comments
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Checking whether a variable is an integer or not [duplicate]
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1153
If you need to do this, do
isinstance(<var>, int)
unless you are in Python 2.x in which...
How to zero pad a sequence of integers in bash so that all have the same width?
...numbers as it outputs the list. For example:
for i in $(seq -f "%05g" 10 15)
do
echo $i
done
will produce the following output:
00010
00011
00012
00013
00014
00015
More generally, bash has printf as a built-in so you can pad output with zeroes as follows:
$ i=99
$ printf "%05d\n" $i
00099
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How do I get bit-by-bit data from an integer value in C?
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155
If you want the k-th bit of n, then do
(n & ( 1 << k )) >> k
Here we creat...
PHP convert XML to JSON
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answered Oct 15 '13 at 21:36
Antonio MaxAntonio Max
7,82166 gold badges4040 silver badges4040 bronze badges
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How to run Unix shell script from Java code?
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answered Feb 15 '14 at 4:15
Not a bugNot a bug
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process.env.NODE_ENV is undefined
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edited Jun 19 '12 at 15:29
answered Jun 19 '12 at 15:19
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Grouping functions (tapply, by, aggregate) and the *apply family
...ments, the 2nd elements, etc.
mapply(sum, 1:5, 1:5, 1:5)
[1] 3 6 9 12 15
#To do rep(1,4), rep(2,3), etc.
mapply(rep, 1:4, 4:1)
[[1]]
[1] 1 1 1 1
[[2]]
[1] 2 2 2
[[3]]
[1] 3 3
[[4]]
[1] 4
Map - A wrapper to mapply with SIMPLIFY = FALSE, so it is guaranteed to return a list.
Map(sum, 1:5,...