Regexps Group « Development « Ruby






  1. Ruby
  2. Development
  3. 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