Regexps Group « Development « Ruby

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Ruby » Development » Regexps Group

1.	An unescaped vertical bar(\|) matches either the regular expression that precedes it or the regular expression that follows it.
2.	use parentheses to group terms within a regular expression
3.	\1 refers to the match of the first group
4.	unescape HTML
5.	Backslash Sequences in the Substitution

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