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How to escape a single quote inside awk
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edited May 21 '15 at 10:39
fedorqui 'SO stop harming'
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Generating all permutations of a given string
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607
public static void permutation(String str) {
permutation("", str);
}
private static void...
How do I Sort a Multidimensional Array in PHP [duplicate]
...mething like this:
foreach ($mdarray as $key => $row) {
// replace 0 with the field's index/key
$dates[$key] = $row[0];
}
array_multisort($dates, SORT_DESC, $mdarray);
For PHP >= 5.5.0 just extract the column to sort by. No need for the loop:
array_multisort(array_column($mdarra...
How to check if any flags of a flag combination are set?
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150
If you want to know if letter has any of the letters in AB you must use the AND & operator. ...
Diff output from two programs without temporary files
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answered Sep 26 '10 at 23:06
John KugelmanJohn Kugelman
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How do I get current date/time on the Windows command line in a suitable format for usage in a file/
Update: Now that it's 2016 I'd use PowerShell for this unless there's a really compelling backwards-compatible reason for it, particularly because of the regional settings issue with using date . See @npocmaka's https://stackoverflow.com/a/19799236/8479
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Counting inversions in an array
...on in java.
long merge(int[] arr, int[] left, int[] right) {
int i = 0, j = 0, count = 0;
while (i < left.length || j < right.length) {
if (i == left.length) {
arr[i+j] = right[j];
j++;
} else if (j == right.length) {
arr[i+j] = lef...
Python int to binary string?
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800
Python's string format method can take a format spec.
>>> "{0:b}".format(37)
'100101...
Is < faster than
Is if( a < 901 ) faster than if( a <= 900 ) .
14 Answers
14
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Select statement to find duplicates on certain fields
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840
To get the list of fields for which there are multiple records, you can use..
select field1,fiel...