lodash / lodash

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	/** Used to check objects for own properties. */
	const hasOwnProperty = Object.prototype.hasOwnProperty

	/**
	* 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).
	*
	* @since 4.1.0
	* @category Object
	* @param {Object} object The object to invert.
	* @param {Function} iteratee The iteratee invoked per element.
	* @returns {Object} Returns the new inverted object.
	* @example
	*
	* const object = { 'a': 1, 'b': 2, 'c': 1 }
	*
	* invertBy(object, value => `group${value}`)
	* // => { 'group1': ['a', 'c'], 'group2': ['b'] }
	*/
	function invertBy(object, iteratee) {
	const result = {}
	Object.keys(object).forEach((key) => {
	const value = iteratee(object[key])
	if (hasOwnProperty.call(result, value)) {
	result[value].push(key)
	} else {
	result[value] = [key]
	}
	})
	return result
	}

	export default invertBy

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