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How to remove array element in mongodb?
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5 Answers
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Is there a timeout for idle PostgreSQL connections?
...anwhile, we want to set a timeout for these idle connections, maybe max to 5 minute.
5 Answers
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python pandas remove duplicate columns
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Jean-François Corbett
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answered Nov 5 '16 at 6:15
Gene BurinskyGene ...
How do you rotate a two dimensional array?
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Here it is in C#
int[,] array = new int[4,4] {
{ 1,2,3,4 },
{ 5,6,7,8 },
{ 9,0,1,2 },
{ 3,4,5,6 }
};
int[,] rotated = RotateMatrix(array, 4);
static int[,] RotateMatrix(int[,] matrix, int n) {
int[,] ret = new int[n, n];
for (int i = 0; i < n; ++i) {
for (i...
How do I fetch lines before/after the grep result in bash?
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275
You can use the -B and -A to print lines before and after the match.
grep -i -B 10 'error' data...
Formatting Decimal places in R
...x, k) trimws(format(round(x, k), nsmall=k))
E.g.,
specify_decimal(1234, 5)
# [1] "1234.00000"
specify_decimal(0.1234, 5)
# [1] "0.12340"
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How to reset a remote Git repository to remove all commits?
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354
Completely reset?
Delete the .git directory locally.
Recreate the git repostory:
$ cd (proje...
MySQL: Order by field size/length
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edited Sep 17 '12 at 4:54
Virendra
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answered A...