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How to iterate over associative arrays in Bash
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591
The keys are accessed using an exclamation point: ${!array[@]}, the values are accessed using ${...
Extract substring using regexp in plain bash
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211
Using pure bash :
$ cat file.txt
US/Central - 10:26 PM (CST)
$ while read a b time x; do [[ $b...
What is that “total” in the very first line after ls -l? [closed]
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answered Sep 13 '11 at 12:18
MatMat
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How do I break out of a loop in Perl?
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edited Jan 5 '18 at 17:41
Alexander Roskamp
2766 bronze badges
answered Nov 19 '08 at 20:23
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MongoDB SELECT COUNT GROUP BY
...ate:
db.contest.aggregate([
{"$group" : {_id:"$province", count:{$sum:1}}}
])
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How to replace an item in an array with Javascript?
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var index = items.indexOf(3452);
if (index !== -1) {
items[index] = 1010;
}
Also it is recommend you not use the constructor method to initialize your arrays. Instead, use the literal syntax:
var items = [523, 3452, 334, 31, 5346];
You can also use the ~ operator ...
How to make “if not true condition”?
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edited Jan 11 '17 at 5:06
heemayl
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How do I check if a variable exists in a list in BASH
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14 Answers
14
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Printing all global variables/local variables?
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edited Jun 17 '14 at 12:24
Miles Rout
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How to append multiple values to a list in Python
...r any other thing that provides a sequence of values.
>>> lst = [1, 2]
>>> lst.append(3)
>>> lst.append(4)
>>> lst
[1, 2, 3, 4]
>>> lst.extend([5, 6, 7])
>>> lst.extend((8, 9, 10))
>>> lst
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>>> ...