Regular Expressions 101

Explanation

Pro

1st Alternative^([0-9]+[^\r\n]?)

^start of line

Group 1([0-9]+[^\r\n]?)

Character Class[0-9]+

+matches at least one character from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Negated Character Class[^\r\n]?

?matches at most one character outside the set below:

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

2nd Alternative(?<=,)([0-9]+[^\r\n]?)

Positive Lookbehind(?<=,)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Group 2([0-9]+[^\r\n]?)

Character Class[0-9]+

+matches at least one character from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Negated Character Class[^\r\n]?

?matches at most one character outside the set below:

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

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

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

26 tokens

Regular Expression

^([0-9]+[^\r\n]?)|(?<=,)([0-9]+[^\r\n]?)

New

# Here are some numbers such as 34 and 53
34
53
124

# Here's a number
45
44

# And a final number
72


# And here's a legacy set of comma separated numbers
23,24,25

Extraction

# Here are some numbers such as 34 and 53
34
53
124

# Here's a number
45
44

# And a final number
72


# And here's a legacy set of comma separated numbers
23,24,25