cache hasOwnProperty

This commit is contained in:
Noah Sloan
2009-12-08 14:24:44 -06:00
parent 38cae13d69
commit a5454d6972

View File

@@ -391,10 +391,11 @@
/* ------------------------- Object Functions: ---------------------------- */ /* ------------------------- Object Functions: ---------------------------- */
// Retrieve the names of an object's properties. // Retrieve the names of an object's properties.
var hasOwnProperty = Object.prototype.hasOwnProperty;
_.keys = function(obj) { _.keys = function(obj) {
if(_.isArray(obj)) return _.range(0, obj.length); if(_.isArray(obj)) return _.range(0, obj.length);
var keys = []; var keys = [];
for (var key in obj) if (Object.prototype.hasOwnProperty.call(obj, key)) keys.push(key); for (var key in obj) if (hasOwnProperty.call(obj, key)) keys.push(key);
return keys; return keys;
}; };