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How to sort an array in Bash
... whitespace in elements (as long as it's not a newline), and works in Bash 3.x.
e.g.:
$ array=("a c" b f "3 5")
$ IFS=$'\n' sorted=($(sort <<<"${array[*]}")); unset IFS
$ printf "[%s]\n" "${sorted[@]}"
[3 5]
[a c]
[b]
[f]
Note: @sorontar has pointed out that care is required if elements...
What is the most efficient/elegant way to parse a flat table into a tree?
...id, descendant_id) VALUES
(1,1), (1,2), (1,4), (1,6),
(2,2), (2,4),
(3,3), (3,5),
(4,4),
(5,5),
(6,6);
Now you can get a tree starting at node 1 like this:
SELECT f.*
FROM FlatTable f
JOIN ClosureTable a ON (f.id = a.descendant_id)
WHERE a.ancestor_id = 1;
The output (in MySQL c...
How do I reverse a C++ vector?
...
Luc Touraille
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answered Jan 16 '12 at 8:46
Ivaylo Strandjev...
Show data on mouseover of circle
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Lars KotthoffLars Kotthoff
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...
Algorithm to return all combinations of k elements from n
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Is there a way to list pip dependencies/requirements?
... |
edited Dec 28 '19 at 23:13
Marco Sulla
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ans...
Why does this assert throw a format exception when comparing structures?
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edited Feb 20 '13 at 4:12
BlueRaja - Danny Pflughoeft
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How do I use vim registers?
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edited Oct 27 '19 at 16:39
D. Ben Knoble
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answer...
Text Progress Bar in the Console [closed]
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31 Answers
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Unique (non-repeating) random numbers in O(1)?
... = n, max starts off at 10:
+--+--+--+--+--+--+--+--+--+--+--+
| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9|10|
+--+--+--+--+--+--+--+--+--+--+--+
^
max
At each iteration, a random number r is selected between 0 and max, array[r] and array[max]...