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How to atomically delete keys matching a pattern using Redis
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Starting with redis 2.6.0, you can run lua scripts, which execute atomically. I have never written one, but I think it would look something like this
EVAL "return redis.call('del', unpack(redis.call('keys', ARGV[1])))" 0 prefix:[YOUR_PREFIX e.g del...
How to limit UITableView row reordering to a section
...ath.section != proposedDestinationIndexPath.section) {
NSInteger row = 0;
if (sourceIndexPath.section < proposedDestinationIndexPath.section) {
row = [tableView numberOfRowsInSection:sourceIndexPath.section] - 1;
}
return [NSIndexPath indexPathForRow:row inSection:sourceInde...
sqlalchemy flush() and get inserted id?
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edited Sep 1 '19 at 0:32
MarredCheese
7,36355 gold badges4949 silver badges5757 bronze badges
answ...
make arrayList.toArray() return more specific types
...ist = new ArrayList<String>();
String[] a = list.toArray(new String[0]);
Before Java6 it was recommended to write:
String[] a = list.toArray(new String[list.size()]);
because the internal implementation would realloc a properly sized array anyway so you were better doing it upfront. Sinc...
Does List guarantee insertion order?
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edited Dec 20 '17 at 13:22
UuDdLrLrSs
6,47577 gold badges3232 silver badges5353 bronze badges
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Convert RGBA PNG to RGB with PIL
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130
Here's a version that's much simpler - not sure how performant it is. Heavily based on some djan...
AWK: Access captured group from line pattern
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answered Jun 2 '10 at 12:50
Peter TillemansPeter Tillemans
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Get first day of week in PHP?
...e('m-d-Y', strtotime('+'.(6-$day).' days'));
$day contains a number from 0 to 6 representing the day of the week (Sunday = 0, Monday = 1, etc.).
$week_start contains the date for Sunday of the current week as mm-dd-yyyy.
$week_end contains the date for the Saturday of the current week as mm-dd-yyy...
What is `git diff --patience` for?
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edited Jun 20 at 9:12
Community♦
111 silver badge
answered Oct 28 '10 at 16:34
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Trying to understand CMTime and CMTimeMake
1) CMTimeMake(1,10) means duration of 1 second and timescale of 10, or 10 frames per second. This means 1s duration of video with 10 frames?
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