std.algorithm.remove from array of custom classes?

[cym13 via Digitalmars-d-learn]

On Wednesday, 9 December 2015 at 13:23:00 UTC, Tim K. wrote:
> On Wednesday, 9 December 2015 at 13:13:36 UTC, BBaz wrote:
>
> Is there a convenience function that allows me to remove an/all 
> object(s) with a certain value from an array or do I need to 
> write one myself?

Here are some elements of strategy:

      import std.algorithm;
      import std.array;

      auto arr = [2, 3, 4, 5, 3, 2, 4];

      // Remove all
      arr = arr.remove!(x => x==3);
      assert(arr == [2, 4, 5, 2, 4];);

      // remove all (filter works lazilly, we use array to get an 
array nonetheless)
      // filter is useful when composing functions, not so much 
here
      arr = arr.filter!(x => x==2).array;
      assert(arr == [4, 5, 4]);

      // Remove one, throw if the element is not found,
      // we use countUntil to get the index.
      arr = arr.remove(arr.countUntil(4));
      assert(arr == [5, 4]);

also you may be interested in reading this:

http://p0nce.github.io/d-idioms/#Adding-or-removing-an-element-from-arrays