How to capture parts of a string into groups using regex?-CodePudding

I need to capture 4 groups from:

John.7200_24.6.txt.gz

Output:

Group1: John
Group2: 7200
Group3: 24
Group4: 6

Here is my regex: ([^.|_|data|gz] )

It captures a single group with multiple matches. How can I fix it?

CodePudding user response：

This pattern ([^.|_|data|gz] ) can be written as ([^._datagz|] ) which uses a negated character class to match 1 chars other than the single chars listed.

You use a single capture group to split on, if you want 4 separate groups, you should create 4 groups and match instead of split.

^(\w )\.(\d )_(\d )\.(\d )

^ Start of string
(\w )\. Capture 1 word chars in group 1 and match .
(\d )_ Capture 1 digits in group 2 and match _
(\d )\. Capture 1 digitsin group 3 and match .
(\d ) Capture 1 digits in group 4

Regex demo

Or matching the full example string:

^(\w )\.(\d )_(\d )\.(\d )\.\w \.gz$