Count repeat occurances in a file

[ranjit]

[tt]
I'm looking for an awk routine to mimic the uniq -c command for the following:

$ cat input
A
A
A
A
B
B

$ cat script
{ A[NR]=$0 }

END{
for(i=1;i<=NR;i++) {
if (A ~/A/)
a++
else if (A ~/B/)
b++
}
print "A:" a
print "B:" b

}

$ awk -f script input
A:4
B:2

Clearly the above works when specifying the strings to be counted in the file: "A" and "B".

How is it done without the string specification e.g. as with the case of counting the repeat occurance of, say, 100 strings in a file.
[/tt]

 

[PHV]

Why not simply this ?
awk '{++a[$0]}END{for(i in a)print i,a}' input

Hope This Helps, PH.
FAQ219-2884
FAQ181-2886

 

[ranjit]

Thanks PHV - I think i was over-complicating things