On Jun 17, 2010, at 12:02 PM, Martin Drautzburg wrote:
The standard map function applies a single function to a list of arguments. But what if I want to apply a list of functions to a single argument. I can of course write such a function, but I wonder if there is a standard way of doing this,
Use Control.Applicative, and the <*> operator. Something like [f, g, h, i, j] <*> pure x (which equals [f x, g x, h x, i x , j x])
Related to that is the problem, that the function in map may require more than one argument, so I need to apply it partially to some value(s) first. But what if I want to fix its second and third argument and not its first argument? Can flip help?
I think the <$> operator can help here. Also, don't forget plain old lambda abstraction to abstract over a free variable.