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