Regular Expressions 101

Explanation

Pro

Group 1(one|three|four)

1st Alternativeone

onethe literal text one (case sensitive)

2nd Alternativethree

threethe literal text three (case sensitive)

3rd Alternativefour

fourthe literal text four (case sensitive)

\s*any whitespace character, repeated any number of times

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\s*any whitespace character, repeated any number of times

Negative Lookahead(?!\1)

\1the text saved by group 1

Group 2(one|three|four)

1st Alternativeone

onethe literal text one (case sensitive)

2nd Alternativethree

threethe literal text three (case sensitive)

3rd Alternativefour

fourthe literal text four (case sensitive)

\s*any whitespace character, repeated any number of times

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\s*any whitespace character, repeated any number of times

Negative Lookahead(?!\1|\2)

1st Alternative\1

\1the text saved by group 1

2nd Alternative\2

\2the text saved by group 2

Group 3(one|three|four)

1st Alternativeone

onethe literal text one (case sensitive)

2nd Alternativethree

threethe literal text three (case sensitive)

3rd Alternativefour

fourthe literal text four (case sensitive)

Global pattern flags

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

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

(one|three|four)\s*,\s*(?!\1)(one|three|four)\s*,\s*(?!\1|\2)(one|three|four)

one,three,four apple is red. should be match

four, three, one orange is orange. should be match

one,four,three the sky is blue. should be match

one,two,four,three should not be match because two is between the group of words

four,one,eight,green,three also not because eight and green is between the group of selected words