That's why Jim mentions if-let and when-let in combination with some, they
both detect if results are nil.
On Sunday, December 2, 2012 10:11:24 PM UTC+1, Ben wrote:
>
> On Sun, Dec 2, 2012 at 12:48 PM, Jim - FooBar();
> <jimpi...@gmail.com<javascript:>>
> wrote:
> > Its perfectly fine to use some as a predicate as far as I know...works
> > excellent with if-let/when-let - what is the problem?
>
> There might be cases in which it matters whether something returns nil
> (as 'some' does) or false (as 'some?' would). ('keep', for instance,
> unlike 'filter', discriminates between nil and false.)
>
> --
> Ben Wolfson
> "Human kind has used its intelligence to vary the flavour of drinks,
> which may be sweet, aromatic, fermented or spirit-based. ... Family
> and social life also offer numerous other occasions to consume drinks
> for pleasure." [Larousse, "Drink" entry]
>
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