[Nix-dev] Nix 1.2 released

[Eelco Dolstra]

Hi,

On 12/12/12 17:15, Shea Levy wrote:

>>> The elem library function evaluates all list elements instead of
>>> returning "true" after finding a matching element.
>> Sure about that?  This seems lazy enough:
>>
>>    elem =
>>      builtins.elem or
>>      (x: list: fold (a: bs: x == a || bs) false list);
>>
> Shouldn't the bs come first? i.e. (a: bs: bs || x == a)?

Not if you want to check from left to right.

-- 
Eelco Dolstra | LogicBlox, Inc. | http://nixos.org/~eelco/