Hello, I have a list of data that are in the format:

Group 1

Group 2

Group 3
Group 3

Group 4

Group 5
Group 5
Group 5

I need to write a perl script that returns only list of the groups with more than one entry (eg. I would want to shorten this list to only include Group 3 and Group 5's entries).

COuld any one give me some suggestions on how to do this? It is the "group has more than 1 line" part below that I am having trouble writing. Eg. 

if(/^\Group\s+(\d+)/){
        if(group has more than one line){
        print group lines }}

[download]

THanks!

In reply to Shorten a list... by la

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