array idioms

[Andrej Mitrovic]

I have asked for remove before, I got some responses here (in fact,
Jonathan made an enhancement request for it):

http://www.digitalmars.com/d/archives/digitalmars/D/learn/Removing_an_object_from_a_range_23212.html

The topic was derailed, but essentially you can provide a predicate as
a function literal to do the work:

import std.stdio;
import std.algorithm;

void main()
{
    int[] elements = [1, 2, 3, 2, 4];
    int needle = 2;

    elements = remove!((item) {return item == needle;} )(elements);
    assert(elements == [1, 3, 4]);
}