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| β | {{w|Regular expressions}} are a way to specify textual patterns. Given a regular expression, one can search for the pattern it specifies inside a text string. A regular expression is used in the ''[[what if? (blog)|what if?]]'' article ''{{what if|75|Phone Keypad}}'' to calculate the answer to that week's question. Randall also mentioned he got distracted by https://regex.alf.nu, a website with a regexp golf game, while researching for the ''[[what if? (blog)|what if?]]'' article ''{{what if|78|T-rex Calories}}''.
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| | [[Category:Programming]] | | [[Category:Programming]] |
