Regular Expression

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Regular Expression: Match Unicode Block Range

This is an online tool that builds a JavaScript regular expression that matches characters that fall in any number of specified Unicode blocks.

Regular Expression That Matches RegExps

Being bored, curious, and redundant all at the same time, I thought: "What if you want to check, in JavaScript, to see if a string is a JavaScript regular expression?" The obvious answer is, in a sense, self-referencing, because you'll have to check with regular expressions too. So basically, a regular expression to check regular expressions in JavaScript. Ugh.

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