Sample Regular Expressions

Expression	Meaning
^abc	Match "abc" at beginning of line
abc$	Match "abc" at end of line
^abc$	Match the line "abc" exactly
^\s*abc	Match "abc" at beginning of line, but allow leading whitespace
^\s*end;?\s*$	Match a line containing only "end" or "end;" with leading or trailing whitespace
abc|def	Matches either "abc" or "def"
a(b|c)d	Matches "abd" or "acd"
a(b|c)d\1	Matches "abdb" or "acdc", but it does not match "abdc"