invert-by

v4.17.15

v4.17.11

STATUS

Passing

DOWNLOADS

129

LICENSE

MIT

VISIBILITY

Public

PUBLISHED

4 years ago

SIZE

N/A

Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring) of values.

Method

Object

2 contributors

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invertBy (

object:Object,

iteratee:Function

) : Object

This method is like invert except that the inverted object is generated from the results of running each element of object thru iteratee. The corresponding inverted value of each inverted key is an array of keys responsible for generating the inverted value. The iteratee is invoked with one argument: (value).

Example

const object = { 'a': 1, 'b': 2, 'c': 1 }

invertBy(object, value => `group${value}`)
// => { 'group1': ['a', 'c'], 'group2': ['b'] }

Arguments

object: Object

The object to invert.

iteratee: Function

The iteratee invoked per element.

Returns

Object

Returns the new inverted object.