groupby
Group lines base on a regular expression
groupby (lostutils) 0.1.5
Group lines based on a given regex.
USAGE:
groupby [FLAGS] [OPTIONS] <regex>
FLAGS:
--count-only
Only show the count of matches per group.
-h, --help
Prints help information
-u
Remove duplicate lines in the same group
-V, --version
Prints version information
OPTIONS:
-g <group-id>
The group-id to group by. Can be an index or a group name.
ARGS:
<regex>
The regex to group by. The match will use the entire expression, unless a group-id is provided.
Usage
// chat.txt
Message from Alice: Hello!
Message from Bob: Hi!
Message from Alice: Did you try groupby?
Message from Bob: Yes. It is really cool!
$ cat chat.txt | groupby "Message from (\w+):" -g 1
***NO-MATCH***
// chat.txt
Alice
Message from Alice: Hello!
Message from Alice: Did you try groupby?
Bob
Message from Bob: Hi!
Message from Bob: Yes. It is really cool!
$ cat chat.txt | groupby "Message from (\w+):" -g 1 --count-only
1 ***NO-MATCH***
2 Alice
2 Bob