Re: [Haskell-cafe] How can i safely change the value of specified key ?

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replace k v xs = (k,v) : filter ((/=v) . fst) xs Great ! thanks you very much

minh thu wrote:

2009/10/22 zaxis :

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f xs = (2,2222) : filter ((/=2) . fst) xs It works but not general as `f` still needs to change other value according to the "KEY". Maybe Data.List will supply what i need.

I don't think Data.List has what you want as-is. The above code is generalized simply: replace k v xs = (k,v) : filter ((/=v) . fst) xs

Cheers, Thu _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

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