Getting what came *before* the results of a find call

[Ali Çehreli via Digitalmars-d-learn]

On 02/27/2015 02:29 PM, Mark Isaacson wrote:
> What's the idiomatic way of getting everything *before* the results of a
> call to find?
>
> assert("hello world".find(" world").what_goes_here??? == "hello");
>
> In an article Andrei wrote a few years ago
> (http://www.informit.com/articles/article.aspx…) he mentioned a function
> like this with the name "until", but I can't find it or its replacement
> in Phobos.

findSplit and friends in std.algorithm:

import std.algorithm;

void main()
{
     assert("hello world".findSplit(" world")[0] == "hello");
}

Ali