56 lines
1.3 KiB
JavaScript
56 lines
1.3 KiB
JavaScript
var baseHas = require('./_baseHas'),
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baseKeys = require('./_baseKeys'),
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indexKeys = require('./_indexKeys'),
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isArrayLike = require('./isArrayLike'),
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isIndex = require('./_isIndex'),
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isPrototype = require('./_isPrototype');
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/**
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* Creates an array of the own enumerable property names of `object`.
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*
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* **Note:** Non-object values are coerced to objects. See the
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* [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
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* for more details.
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*
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* @static
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* @memberOf _
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* @category Object
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* @param {Object} object The object to query.
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* @returns {Array} Returns the array of property names.
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* @example
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*
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* function Foo() {
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* this.a = 1;
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* this.b = 2;
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* }
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*
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* Foo.prototype.c = 3;
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*
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* _.keys(new Foo);
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* // => ['a', 'b'] (iteration order is not guaranteed)
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*
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* _.keys('hi');
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* // => ['0', '1']
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*/
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function keys(object) {
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var isProto = isPrototype(object);
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if (!(isProto || isArrayLike(object))) {
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return baseKeys(object);
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}
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var indexes = indexKeys(object),
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skipIndexes = !!indexes,
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result = indexes || [],
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length = result.length;
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for (var key in object) {
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if (baseHas(object, key) &&
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!(skipIndexes && (key == 'length' || isIndex(key, length))) &&
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!(isProto && key == 'constructor')) {
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result.push(key);
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}
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}
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return result;
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}
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module.exports = keys;
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