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How to get current time in milliseconds in PHP?
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How to write a Ruby switch statement (case…when) with regex and backreferences?
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The references to the latest regex matching groups are always stored in pseudo variables $1 to...
How to round float numbers in javascript?
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What is the best way to test for an empty string in Go?
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Ruby replace string with captured regex pattern
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Try '\1' for the replacement (single quotes are important, otherwise you need to escape the \)...
An error occurred while installing pg (0.17.1), and Bundler cannot continue
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How is this fibonacci-function memoized?
...is asked for again. If we define some list, xs=[0..] and later ask for its 100th element, xs!!99, the 100th slot in the list gets "fleshed out", holding the number 99 now, ready for next access.
That is what that trick, "going-through-a-list", is exploiting. In normal doubly-recursve Fibonacci def...
How can I check the size of a collection within a Django template?
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edited May 3 '17 at 6:56
MichielB
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Run Cron job every N minutes plus offset
...-59/20 * * * *
Explanation
An * in the minute field is the same as 0-59/1 where 0-59 is the range and 1 is the step. The command will run at the first minute in the range (0), then at all successive minutes that are distant from the first by step (1), until the last (59).
Which is why */20 * * *...
How to sort a list of lists by a specific index of the inner list?
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