[Tutor] Higher-Order Function Examples

[Steven D'Aprano]

Steven D'Aprano wrote:

> An example might help. Back in the old days, before Python had a sum() 
> function, the easiest way to add up a list of numbers was to use reduce 
> and a small function to add two numbers:
> 
> def add(x, y):
>     return x+y
> 
> total = filter(add, [2, 4, 5, 9, 1])

Arggggh! Of course, I meant *reduce* in that example, not filter. Sorry 
for any confusion!



-- 
Steven