Returns the composed aggregate object.
5.5.0
groupBy([6.1, 4.2, 6.3], Math.floor);
// => { '4': [4.2], '6': [6.1, 6.3] }
// The `property` iteratee shorthand.
groupBy(['one', 'two', 'three'], 'length');
// => { '3': ['one', 'two'], '5': ['three'] }
Creates an object composed of keys generated from the results of running each element of
collection
thruiteratee
. The order of grouped values is determined by the order they occur incollection
. The corresponding value of each key is an array of elements responsible for generating the key. The iteratee is invoked with one argument: (value).