Hi, Tks, this is not what I wanted.
I want remove pairs list, [(5,1),(4,1),(3,1),(2,1),(1,1)] remove [(2,1),(1,1)] [(5,1),(4,1),(3,1)] so pairs [(2,1),(1,1)] removed. Tks. --- Pierre Barbier de Reuille <[EMAIL PROTECTED]> wrote: > One answer is the infix operator (\\) defined in the > List module (or in > Data.List ...) > > But it's in ont of the "set" operations. For example > try : > > [1..10] \\ [3..6] > [1,2,7,8,9,10] > > But also : > > ([1..10]++[1..10]) \\ [3..6] > [1,2,7,8,9,10,1,2,7,8,9,10] > > So _all_ the elements with values in [3..6] where > removed !! > If that's what you want ! Perfect ... if not : what > do you want exactly > ? List substraction is not uniq. > > Pierre > > Bright Sun a �crit : > > In Haskell, ++ can spends second list argument > onto > > the end of first list argument. How to substract > the > > second list from the first list? > > > > For example, > > [(5,1),(4,1),(3,1),(2,1),(1,1)] > > substract > > [(2,1),(1,1)] > > I want to get result list: > > [(5,1),(4,1),(3,1)] > > > > Tks. > > > > > > > > __________________________________ > > Do you Yahoo!? > > Make Yahoo! your home page > > http://www.yahoo.com/r/hs > > _______________________________________________ > > Haskell mailing list > > [email protected] > > http://www.haskell.org/mailman/listinfo/haskell > > > > -- > Pierre Barbier de Reuille > > INRA - UMR Cirad/Inra/Cnrs/Univ.MontpellierII AMAP > Botanique et Bio-informatique de l'Architecture des > Plantes > TA40/PSII, Boulevard de la Lironde > 34398 MONTPELLIER CEDEX 5, France > > tel : (33) 4 67 61 65 77 fax : (33) 4 67 61 > 56 68 > __________________________________ Do you Yahoo!? Yahoo! Small Business - Try our new resources site! http://smallbusiness.yahoo.com/resources/ _______________________________________________ Haskell mailing list [email protected] http://www.haskell.org/mailman/listinfo/haskell
