Function uniqBy

Creates a duplicate-free version of an array, it accepts iteratee which is invoked for each element in array to generate the criterion by which uniqueness is computed.

Example

uniqBy([2.1, 1.2, 2.3], Math.floor);
// returns [2.1, 1.2]
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Example

uniqBy([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
returns [{ 'x': 1 }, { 'x': 2 }]
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