84 lines
1.1 KiB
JavaScript
84 lines
1.1 KiB
JavaScript
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/**
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* HOP ref.
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*/
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var has = Object.prototype.hasOwnProperty;
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/**
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* Return own keys in `obj`.
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*
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* @param {Object} obj
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* @return {Array}
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* @api public
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*/
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exports.keys = Object.keys || function(obj){
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var keys = [];
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for (var key in obj) {
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if (has.call(obj, key)) {
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keys.push(key);
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}
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}
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return keys;
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};
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/**
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* Return own values in `obj`.
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*
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* @param {Object} obj
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* @return {Array}
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* @api public
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*/
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exports.values = function(obj){
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var vals = [];
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for (var key in obj) {
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if (has.call(obj, key)) {
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vals.push(obj[key]);
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}
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}
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return vals;
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};
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/**
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* Merge `b` into `a`.
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*
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* @param {Object} a
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* @param {Object} b
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* @return {Object} a
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* @api public
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*/
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exports.merge = function(a, b){
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for (var key in b) {
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if (has.call(b, key)) {
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a[key] = b[key];
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}
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}
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return a;
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};
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/**
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* Return length of `obj`.
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*
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* @param {Object} obj
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* @return {Number}
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* @api public
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*/
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exports.length = function(obj){
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return exports.keys(obj).length;
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};
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/**
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* Check if `obj` is empty.
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*
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* @param {Object} obj
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* @return {Boolean}
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* @api public
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*/
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exports.isEmpty = function(obj){
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return 0 == exports.length(obj);
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};
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