Newbie question concerning map functionality

[Alex Martelli]

Henk wrote:

> I want to use the built-in map function to speed up the following for
> loop. But I somehow fail to incorporate the unction called in the
> argument. Can somebody help me out?
> 
> for child in self.childNodes:
>     clone.appendChild(child.cloneNode(1))

I very much doubt you can use map to speed this up; map only gives a
speed-up (and a modest one) when its first argument is a function you
need to call anyway.  Adding a lambda so you can do anything but
calling a function (e.g., in order to call a method, as you're doing
here on each child) will no doubt dissipate any gain.


Alex