Best way to test predicate against a range

[BCS]

Hello Jonathan,

> For example, there are two functions that I'd like to be have: all()
> and any(). That is, I want a function which checks a predicate against
> a range and returns whether all elements in that range satisfy the
> predicate, and I want a function that checks a predicate against a
> range and returns whether any element satisfies the predicate.
> Ideally, all() would shortcut if it found even one element which
> didn't satisfy the predicate, and any() would shortcut if it found
> even one that did.

The trivial solution (no shortcuting) would be to map the predicate and reduce 
via 'and' or 'or'.

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