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uniqBy

_.uniqBy(iteratee, array) # Ⓢ [Ⓣ][1] Ⓝ

This method is like _.uniq except that it accepts iteratee which is



invoked for each element in array to generate the criterion by which



uniqueness is computed. The order of result values is determined by the



order they occur in the array. The iteratee is invoked with one argument:



(value).

Since​

4.0.0

Arguments​

  1. iteratee (Function): The iteratee invoked per element.
  2. array (Array): The array to inspect.

Returns​

(Array): Returns the new duplicate free array.

Example​

_.uniqBy(Math.floor, [2.1, 1.2, 2.3]);
// => [2.1, 1.2]

// The `_.property` iteratee shorthand.
_.uniqBy('x', [{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }]);
// => [{ 'x': 1 }, { 'x': 2 }]