Regular Expressions 101

Explanation
Pro

^start of line

\d+a Unicode decimal digit, repeated at least once

\sa Unicode whitespace character

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

25 tokens

^\d+\s

New

0 Ackman, R.G.. Tocher, C.S. and McLachlan. J.. 1968. Marine phytoplankter fatty acids. J. Fish. Res. Board Can., 25: 1603-1620. 1

0 Ackman, R.G.. Tocher, C.S. and McLachlan. J.. 1968. Marine phytoplankter fatty acids. J. Fish. Res. Board Can., 25: 1603-1620. 1