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Regex to validate date format dd/mm/yyyy

...post. I modified it to take dd/mm/yyyy, dd-mm-yyyy or dd.mm.yyyy. ^(?:(?:31(\/|-|\.)(?:0?[13578]|1[02]))\1|(?:(?:29|30)(\/|-|\.)(?:0?[13-9]|1[0-2])\2))(?:(?:1[6-9]|[2-9]\d)?\d{2})$|^(?:29(\/|-|\.)0?2\3(?:(?:(?:1[6-9]|[2-9]\d)?(?:0[48]|[2468][048]|[13579][26])|(?:(?:16|[2468][048]|[3579][26])00))))$...
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How can I use “:” as an AWK field separator?

... "-F" is a command line argum>mem>nt, not AWK syntax. Try: echo "1: " | awk -F ":" '/1/ {print $1}' share | improve this answer | follow | ...
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Find the most frequent number in a numpy vector

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Best way to test if a row exists in a MySQL table

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What do “branch”, “tag” and “trunk” m>mem>an in Subversion repositories?

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Split (explode) pandas datafram>mem> string entry to separate rows

...bout som>mem>thing like this: In [55]: pd.concat([Series(row['var2'], row['var1'].split(',')) for _, row in a.iterrows()]).reset_index() Out[55]: index 0 0 a 1 1 b 1 2 c 1 3 d 2 4 e 2 5 f 2 Then you just have to renam>mem> the columns ...
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Why are these numbers not equal?

...ally true because som>mem> values which are simple, finite decimals (such as 0.1 and 0.05) are not represented exactly in the computer and so the results of arithm>mem>tic on them may not give a result that is identical to a direct representation of the "known" answer. This is a well known limitation of co...
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Why #define TRUE (1==1) in a C boolean macro instead of simply as 1?

... 156 This approach will use the actual boolean type (and resolve to true and false) if the compiler...
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Ruby - elegantly convert variable to an array if not an array already

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Statistics: combinations in Python

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