Regular Expressions 101

Pro

^start of line

Group 1(([^,\n]*,){4}[^,\n]*)

Group 2([^,\n]*,){4}

{4}repeats the group contents below exactly 4 times:

Negated Character Class[^,\n]*

*matches any number of characters outside the set below:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

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

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Negated Character Class[^,\n]*

*matches any number of characters outside the set below:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

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

.*any character (except for line terminators), repeated any number of times

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

Regular Expression

^(([^,\n]*,){4}[^,\n]*).*

New

movie/spiderman,genre/action,movie:marvel
movie/kingsman,genre/action
movie/spiderman,genre/action,movie:marvel,movie:dfjkl,movie:fskj,movie:aa,movie:mdkk

Substitution

\1

movie/spiderman,genre/action,movie:marvel
movie/kingsman,genre/action
movie/spiderman,genre/action,movie:marvel,movie:dfjkl,movie:fskj,movie:aa,movie:mdkk