Example General Resource Tools

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Start of string anchor ^
What is the "start of string" anchor in a regular expression? How to use it? How to write a regular expression using "start of string" anchor to validate discover credit card numbers like: 6011963280099774 ? The "start of string" anchor is an atomic zero-width assertion specifing that the match must... 2013-01-26, ∼3094🔥, 0💬

Finding repeating words in a document
How to find repeating words in a text document with a regular expression? An example text document is listed below: After narrowly escaping a sensitive decapitation, Bond Bond is shot with a tranquilizer gun. He wakes up up on a plane to a woman standing over him, who introduces herself: "My name is... 2013-02-03, ∼3086🔥, 0💬

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Example General Resource Tools