Issue 1323

[Peter Alexander]

On 9/01/11 1:28 PM, Tomek Sowiński wrote:
> bearophile napisał:
>
>>> Also, IMO, it has no real advantage, why not use std.algorithm.find instead ?
>>
>> The syntax is worse, I don't like to call a function for something so common and basic. It's like calling a library
>> function to join two strings (and find("hello", "llox") doesn't return a boolean).
>
> That can be pretty much solved with a wrapper:
>
> bool has(alias pred = "a == b", R, E)(R haystack, E needle) {
>      return find(haystack, needle).empty;
> }
>
> -------
>
> if (someString.has(c))
>      ...
>
> Can we add 'has' (or call it 'contains', I don't mind) to std.algorithm and end the discussion?
>

What's wrong with std.algorithm.canFind?

http://www.digitalmars.com/d/2.0/phobos/std_algorithm.html#canFind

 >bool canFind(alias pred = "a == b", Range, V)(Range range, V value);
 >Returns true if and only if value can be found in range. Performs 
Ο(r.length) evaluations of pred.