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Greedy and lazy matching provide control over the extent of matching in regular expressions, allowing for precise and efficient pattern extraction in JavaScript.

It's been a while since I worked on regexs in JavaScript, but generally the way you do this in most programming languages is to build the regex as a string and then pass it into the regex engine.

I have a perl regex that i'm fairly certain should work (perl) but is being too greedy: There are two occurrences of '123456' in the string. Which one are you targeting? Based on the regex you ...