Given a list of tuples like this:
dic = [(1,"aa"),(1,"cc"),(2,"aa"),(3,"ff"),(3,"gg"),(1,"bb")]
How to group items of dic resulting in a list grp where,
grp = [(1,["aa","bb","cc"]), (2, ["aa"]), (3, ["ff","gg"])]
I'm actually a newcomer to Haskell...and seems to be falling in love with it..
Using group or groupBy in Data.List will only group similar adjacent items in a list.
I wrote an inefficient function for this, but it results in memory failures as I need to process a very large coded string list. Hope you would help me find a more efficient way.
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