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