You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
42 lines
1.1 KiB
42 lines
1.1 KiB
var constant = require('./constant'), |
|
createInverter = require('./_createInverter'), |
|
identity = require('./identity'); |
|
|
|
/** 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)); |
|
|
|
module.exports = invert;
|
|
|