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PHP Regex to check date is in YYYY-MM-DD format

... Try this. $date="2012-09-12"; if (preg_match("/^[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|[1-2][0-9]|3[0-1])$/",$date)) { return true; } else { return false; } share ...
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How to validate IP address in Python? [duplicate]

... answered Nov 25 '08 at 23:50 DustinDustin 78.2k1717 gold badges103103 silver badges131131 bronze badges ...
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What is the best way to initialize a JavaScript Date to midnight?

... 910 The setHours method can take optional minutes, seconds and ms arguments, for example: var d = n...
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Find the PID of a process that uses a port on Windows

... Local Address Foreign Address State PID TCP 0.0.0.0:37 0.0.0.0:0 LISTENING 1111 share | improve this answer | f...
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Run an OLS regression with Pandas Data Frame

...kage which was one of pandas' optional dependencies before pandas' version 0.20.0 (it was used for a few things in pandas.stats.) >>> import pandas as pd >>> import statsmodels.formula.api as sm >>> df = pd.DataFrame({"A": [10,20,30,40,50], "B": [20, 30, 10, 40, 50], "C":...
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How do you make an array of structs in C?

... 107 #include<stdio.h> #define n 3 struct body { double p[3];//position double v[3];//...
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How to validate an Email in PHP?

...LTER_VALIDATE_EMAIL) PHP Manual filter_var() Available in PHP >= 5.2.0 If you don't want to change your code that relied on your function, just do: function isValidEmail($email){ return filter_var($email, FILTER_VALIDATE_EMAIL) !== false; } Note: For other uses (where you need Regex)...
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pandas DataFrame: replace nan values with average of columns

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Numbering rows within groups in a data frame

...| edited Mar 14 '17 at 22:06 Frank 62.4k88 gold badges8181 silver badges157157 bronze badges answered Oc...
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What is the ultimate postal code and zip regex?

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