Regular Expressions 101

Explanation

Pro

^start of line

Atomic Group(?>(?!\2\b|\3\b)(1\d{1}|2[0-2]{1}|\d{1}+)[,.; ]+)

Negative Lookahead(?!\2\b|\3\b)

1st Alternative\2\b

\2the text saved by group 2

\ban ASCII word boundary

2nd Alternative\3\b

\3the text saved by group 3

\ban ASCII word boundary

Group 1(1\d{1}|2[0-2]{1}|\d{1}+)

1st Alternative1\d{1}

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

\d{1}a digit, repeated exactly 1 time

2nd Alternative2[0-2]{1}

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[0-2]{1}

{1}matches one character from the set below:

0-2one character from 0 (48₁₀) to 2 (50₁₀)

3rd Alternative\d{1}+

\d{1}+a digit, repeated exactly 1 time

Character Class[,.; ]+

+matches at least one character from the set below:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

Atomic Group(?>(?!\1\b|\3\b)(1\d{1}|2[0-2]{1}|\d{1}+)[,.; ]+)

Negative Lookahead(?!\1\b|\3\b)

1st Alternative\1\b

\1the text saved by group 1

\ban ASCII word boundary

2nd Alternative\3\b

\3the text saved by group 3

\ban ASCII word boundary

Group 2(1\d{1}|2[0-2]{1}|\d{1}+)

1st Alternative1\d{1}

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

\d{1}a digit, repeated exactly 1 time

2nd Alternative2[0-2]{1}

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[0-2]{1}

{1}matches one character from the set below:

0-2one character from 0 (48₁₀) to 2 (50₁₀)

3rd Alternative\d{1}+

\d{1}+a digit, repeated exactly 1 time

Character Class[,.; ]+

+matches at least one character from the set below:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

Atomic Group(?>(?!\1\b|\2\b)(1\d{1}|2[0-2]{1}|\d{1}+))

Negative Lookahead(?!\1\b|\2\b)

1st Alternative\1\b

\1the text saved by group 1

\ban ASCII word boundary

2nd Alternative\2\b

\2the text saved by group 2

\ban ASCII word boundary

Group 3(1\d{1}|2[0-2]{1}|\d{1}+)

1st Alternative1\d{1}

2nd Alternative2[0-2]{1}

3rd Alternative\d{1}+

$end of line

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

25 tokens

Regular Expression

^(?>(?!\2\b|\3\b)(1\d{1}|2[0-2]{1}|\d{1}+)[,.; ]+)(?>(?!\1\b|\3\b)(1\d{1}|2[0-2]{1}|\d{1}+)[,.; ]+)(?>(?!\1\b|\2\b)(1\d{1}|2[0-2]{1}|\d{1}+))$

New

1,2,12
22,3, 21
1,,,,22,,,,19
9. 12,.. 8
1.1. 2
2. 1. 2
3,3,12

Extraction

1,2,12
22,3, 21
1,,,,22,,,,19
9. 12,.. 8
1.1. 2
2. 1. 2
3,3,12