65 lines
1.6 KiB
JavaScript
65 lines
1.6 KiB
JavaScript
var isArguments = require('../lang/isArguments'),
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isArray = require('../lang/isArray'),
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isIndex = require('../internal/isIndex'),
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isLength = require('../internal/isLength'),
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isObject = require('../lang/isObject');
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/** Used for native method references. */
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var objectProto = Object.prototype;
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/** Used to check objects for own properties. */
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var hasOwnProperty = objectProto.hasOwnProperty;
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/**
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* Creates an array of the own and inherited enumerable property names of `object`.
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*
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* **Note:** Non-object values are coerced to objects.
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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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* _.keysIn(new Foo);
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* // => ['a', 'b', 'c'] (iteration order is not guaranteed)
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*/
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function keysIn(object) {
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if (object == null) {
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return [];
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}
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if (!isObject(object)) {
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object = Object(object);
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}
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var length = object.length;
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length = (length && isLength(length) &&
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(isArray(object) || isArguments(object)) && length) || 0;
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var Ctor = object.constructor,
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index = -1,
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isProto = typeof Ctor == 'function' && Ctor.prototype === object,
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result = Array(length),
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skipIndexes = length > 0;
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while (++index < length) {
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result[index] = (index + '');
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}
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for (var key in object) {
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if (!(skipIndexes && isIndex(key, length)) &&
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!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
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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 = keysIn;
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