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x/lodash/invert.js

A modern JavaScript utility library delivering modularity, performance, & extras.
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import constant from './constant.js';import createInverter from './_createInverter.js';import identity from './identity.js';
/** Used for built-in method references. */var objectProto = Object.prototype;
/** * Used to resolve the * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring) * of values. */var nativeObjectToString = objectProto.toString;
/** * Creates an object composed of the inverted keys and values of `object`. * If `object` contains duplicate values, subsequent values overwrite * property assignments of previous values. * * @static * @memberOf _ * @since 0.7.0 * @category Object * @param {Object} object The object to invert. * @returns {Object} Returns the new inverted object. * @example * * var object = { 'a': 1, 'b': 2, 'c': 1 }; * * _.invert(object); * // => { '1': 'c', '2': 'b' } */var invert = createInverter(function(result, value, key) { if (value != null && typeof value.toString != 'function') { value = nativeObjectToString.call(value); }
result[value] = key;}, constant(identity));
export default invert;