Match One of a Set of Literal Characters ( [ ] )
You can put a set of literal characters inside square brackets. The pattern matches if any one of the set of characters is found. You can indicate a range of characters within the brackets by using a hyphen (-).
NOTE If you want to include a hyphen as a literal character, include it at the beginning or the end of the set. Regular Expression | Match | Not a Match |
|---|
a[bcd]ef | abef, acef, adef | aef, abcef | a[b-d]ef | abef, acef, adef | aef, abcef | a[,.-]b | a,b, a.b, a-b | ab, axb, a,-b | file[1-2][0-9]? | file1, file15, file20 | file, file3, file40 | |