Re: [boost] [Algorithm] contains(v, 1)

On 5/31/18 5:58 AM, Olaf van der Spek via Boost wrote:

On Thu, May 31, 2018 at 2:50 PM, Robert Ramey via Boost wrote:

...

On 5/31/18 3:14 AM, Olaf van der Spek via Boost wrote:

...

Hi,

vector<int> v; contains(v, 1);

This doesn't work as contains expects two ranges (AFAIK). Is there some other function that's usable for this purpose? Should contains support a value for argument 2?

Gr,

Hmmm- can't you just make your own? Something like ...

#include <algorithm>

template<typename V> bool contains(const V & v, const typename V::value_type & t){ return v.end != find(v.begin(), v.end(), t); }

I'm pretty sure it would work on strings as well.

Of course I could, but I'd rather not..

Why not? This is a sincere question. If libraries contain lots of stuff like this, it makes the libraries harder to understand. I prefer a set of simple, transparent tools which are easily composed. I see we disagree on this, I'm curious what your argument is. Robert Ramey