# # `filter()`

The filter method filters the collection using the given callback, keeping only those items that pass a given truth test:

    const collection = collect([1, 2, 3, 4]);

    const filtered = collection.filter((value, key) => value > 2);

    filtered.all();

    //=> [3, 4]

If no callback is supplied, all entries of the collection that are equivalent to `false` will be removed:

    const collection = collect([
      0,
      1,
      2,
      null,
      3,
      4,
      undefined,
      5,
      6,
      7,
      [],
      8,
      9,
      {},
      10
    ]);

    const filtered = collection.filter();

    filtered.all();

    //=> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

> For the inverse of `filter`, see the `reject` method.

View source on GitHub