yui-object.js revision d4dbc3afb5bb9cfd13490b358dc37bf951104ca7
(function() {
/**
* Adds the following Object utilities to the YUI instance
* @class YUI~object
*/
/**
* Y.Object(o) returns a new object based upon the supplied object.
* @TODO Use native Object.create() when available
* @method Object
* @static
* @param o the supplier object
* @return {object} the new object
*/
Y.Object = function(o) {
var F = function() {};
F.prototype = o;
return new F();
};
var O = Y.Object,
/**
* Extracts the keys, values, or size from an object
*
* @method _extract
* @param o the object
* @param what what to extract (0: keys, 1: values, 2: size)
* @return {boolean|Array} the extracted info
* @private
*/
for (i in o) {
if (count) {
out++;
} else {
if (o.hasOwnProperty(i)) {
}
}
}
return out;
};
/**
* Returns an array containing the object's keys
* @TODO use native Object.keys() if available
* @method Object.keys
* @static
* @param o an object
* @return {string[]} the keys
*/
O.keys = function(o) {
return _extract(o);
};
/**
* Returns an array containing the object's values
* @TODO use native Object.values() if available
* @method Object.values
* @static
* @param o an object
* @return {Array} the values
*/
O.values = function(o) {
return _extract(o, 1);
};
/**
* Returns the size of an object
* @TODO use native Object.size() if available
* @method Object.size
* @static
* @param o an object
* @return {int} the size
*/
O.size = function(o) {
return _extract(o, 2);
};
/**
* Returns true if the object contains a given key
* @method Object.hasKey
* @static
* @param o an object
* @param k the key to query
* @return {boolena} true if the object contains the key
*/
O.hasKey = function(o, k) {
return (o.hasOwnProperty(k));
};
/**
* Returns true if the object contains a given value
* @method Object.hasValue
* @static
* @param o an object
* @param v the value to query
* @return {boolean} true if the object contains the value
*/
O.hasValue = function(o, v) {
};
/**
* Determines whether or not the property was added
* to the object instance. Returns false if the property is not present
* in the object, or was inherited from the prototype.
*
* @deprecated Safari 1.x support has been removed, so this is simply a
* wrapper for the native implementation. Use the native implementation
* directly instead.
*
* @TODO Remove in B1
*
* @method Object.owns
* @static
* @param o {any} The object being testing
* @param p {string} the property to look for
* @return {boolean} true if the object has the property on the instance
*/
/**
* Executes a function on each item. The function
* receives the value, the key, and the object
* as paramters (in that order).
* @method Object.each
* @static
* @param o the object to iterate
* @param f {function} the function to execute
* @param c the execution context
* @param proto {boolean} include proto
* @return {YUI} the YUI instance
*/
var s = c || Y, i;
for (i in o) {
if (proto || o.hasOwnProperty(i)) {
f.call(s, o[i], i, o);
}
}
return Y;
};
})();