Adds a ¿, for ¡ replace the last ? for !

Checking for valid CHEQROOM QR Codes

find and replace bad and p0rn indonesian words

as title says

Perfect Date validator from 1900-01-01 to 2013-12-31, all with leap years and perfect dates.

trim leading and trailing whitespace from a string

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Validation when city and state are like in format city, state

Grabs sentences including terms like: e.g. z.b. Figs.These get caught in 1st capturing group. Problem: how to only accept matching sentences which contain pattern \b\d+[a-z]{0,2}\b?

Match sentences ignore e.g. Fig. z.b. etc

This a regex for matching linkedin profile URLs