Re: [Haskell-cafe] Haskell and the Software design process

I'm a little confused about this too. I've seen many functions defined like: f x = (\s -> ...) which is a partial function because it returns a function and is the same as: f x s = ... Off the top of my head the State monad makes extensive use if this style. Is this bad? - deech On 5/2/10, Bradford Larsen wrote:

On Sun, May 2, 2010 at 9:18 PM, Edgar Z. Alvarenga wrote:

...

On Sun, 02/May/2010 at 13:10 -0700, Don Stewart wrote:

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    * Avoid partial functions

Why?

Edgar

Ever place you use a partial function, you need to verify that its usage is in fact safe. Otherwise, you risk pattern match failures, undefined, nontermination, and other types of nasties.

If you can structure your code so none of your functions are partial, verification that their usage is safe is a whole lot easier. :-)

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