Awk/Unix group by

Question

have this text file:

name, age
joe,42
jim,20
bob,15
mike,24
mike,15
mike,54
bob,21

Trying to get this (count):

joe 1
jim 1
         


        

Answer 1

A strictly awk solution...

BEGIN { FS = "," }
{ ++x[$1] }
END { for(i in x) print i, x[i] }

If name, age is really in the file, you could adjust the awk program to ignore it...

BEGIN   { FS = "," }
/[0-9]/ { ++x[$1] }
END     { for(i in x) print i, x[i] }