std.algorithm.canFind behavior difference between arrays and elements

[Arun Chandrasekaran]

On Friday, 7 December 2018 at 18:57:48 UTC, Dennis wrote:
> On Friday, 7 December 2018 at 18:51:27 UTC, Arun Chandrasekaran 
> wrote:
>> Why is there a difference in the behavior?
>
> Your first assert expression is looking for a string in a 
> larger string, your second expression looks for hay which is 
> not a string but a string[]. To flatten the array, use:
>
> assert(canFind(hay.join, "111"));

This succeeds.

assert(canFind(hay, "aaa222aaa"));

So the difference in the behaviour is caused by canFind checking 
for equality when string[] is passed. Is this the expected 
behaviour? I wouldn't want to join the array, for the array could 
be really big.