Dear Monks, I have several thousands of lines that have a format like the following:
ID1<TAB>name1-name2-name3-name4....-nameX
ID2<TAB>name1-name2-name3-name4....-nameX
ID3<TAB>name1-name2-name3-name4....-nameX
...

[download]

What I want to achieve is to keep each of the IDs as they appear and ONLY the unique names that appear on the second column. For instance, imagine: 
ID1<TAB>nick-john-helena
ID2<TAB>george-andreas-lisa-anna-matthew-andreas-lisa
ID3<TAB>olivia-niels-peter-lars-niels-lars-olivia-olivia
...

[download]

my output should be: 
ID1<TAB>nick-john-helena
ID2<TAB>george-andreas-lisa-anna-matthew
ID3<TAB>olivia-niels-peter-lars

[download]

What I am looking is to see if someone has a quick solution to this. My approach would be to read each line, store the ID and the line of names, split the names using - as delimiter, put all names into an temp array on the fly and then make this array unique and print the unique elements. Any more clever solution perhaps?

In reply to How can I make a string unique (quicker than my approach at least) by Anonymous Monk

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