Regular Expressions 101

Pro

Negative Lookbehind(?<!\S)

\Sany character that is not Unicode whitespace

Character Class[a-z]

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

Non-Capturing Group(?:,[a-z])*

*repeats the group contents below any number of times:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Character Class[a-z]

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

Negative Lookahead(?!\S)

\Sany character that is not Unicode whitespace

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

(?<!\S)[a-z](?:,[a-z])*(?!\S)

New

E   1   1999-02-28  b,g,f    jjj:12,bbb:3,ddd:9,ggg:8,hhh:2
A   2   1999-10-28  a,f,c,d  ccc:2,ddd:0,aaa:3,hhh:9

E   1   1999-02-28  b,g,f    jjj:12,bbb:3,ddd:9,ggg:8,hhh:2
A   2   1999-10-28  a,f,c,d  ccc:2,ddd:0,aaa:3,hhh:9