I am trying to write a function row :: Int -> Int -开发者_如何学Go> [Int] row n v that returns a list of n integers, all 0\'s, except for the vth element, which needs to be a 1.
Currently, there two popular choices which implement the iteratee pa开发者_运维技巧ttern: The enumerator package and
-- 3 (find k\"th element of a li开发者_开发技巧st) element_at xs x = xs !! x prop_3a xs x = (x < length xs && x >= 0) ==> element_at xs (x::Int) == (xs !! x::Int)
I\'m trying to install GHC with -fPIC support in Fedora. I\'ve grabbed a source tarball since it seems no binary one has this.
I\'m using the GHC to build a haskell pogram for Windows with help of a speciefic (Haskell-)Libr开发者_Python百科ary which is called citeproc-hs. On a 32Bit-Windows XP machine the application works ju
In the \"Functors, Applicative Functors and Monoids\" chapter of Learn You A Haskell, Miran does the following:
The definition of Enumerator is: type Enumerator a m b = Step a m b -> Iteratee a m b The documentation states that while Iteratees comsume data, Enumerators produce it.I can understand how one
Consider this: map fromEnum $ zipWith (==) \"aaaa\" \"abaa\" -- [1,0,1,1] It would be nice to have only one step here:
Consider the famous fibs = 0 : 1 : zipWith (+) fibs (tail fibs) Suppose that, to avoid the monomorphism restriction, this is annotated with:
OS: MacOSX 10.7.1 GHC and Haskell-platform from brew. GHCi, version 7.0.4: http://www.haskell.org/ghc/:? for help
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