yui-object.js revision 2c5ce90c334a2d0f18474e85c93b424b6ec9daaa
/**
* The YUI module contains the components required for building the YUI seed file.
* This includes the script loading mechanism, a simple queue, and the core utilities for the library.
* @module yui
* @submodule yui-base
*/
(function() {
/**
* Adds the following Object utilities to the YUI instance
* @class Object
*/
/**
* Y.Object(o) returns a new object based upon the supplied object.
* @TODO Use native Object.create() when available
* @method ()
* @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
* @static
* @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 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 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 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 hasKey
* @static
* @param o an object
* @param k the key to query
* @return {boolean} true if the object contains the key
*/
O.hasKey = function(o, k) {
// return (o.hasOwnProperty(k));
return (k in o);
};
/**
* Returns true if the object contains a given value
* @method 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 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
*/
O.owns = function(o, k) {
return (o.hasOwnProperty(k));
};
/**
* Executes a function on each item. The function
* receives the value, the key, and the object
* as paramters (in that order).
* @method 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;
};
/**
* Retrieves the sub value at the provided path,
* from the value object provided.
*
* @method getValue
* @param o The object from which to extract the property value
* @param path {Array} A path array, specifying the object traversal path
* from which to obtain the sub value.
* @return {Any} The value stored in the path, undefined if not found.
* Returns the source object if an empty path is provided.
*/
o = o[p[i]];
}
return o;
};
/**
* Sets the sub-attribute value at the provided path on the
* value object. Returns the modified value object, or
* undefined if the path is invalid.
*
* @method setValue
* @param o The object on which to set the sub value.
* @param path {Array} A path array, specifying the object traversal path
* at which to set the sub value.
* @param val {Any} The new value for the sub-attribute.
* @return {Object} The modified object, with the new sub value set, or
* undefined, if the path was invalid.
*/
if (leafIdx >= 0) {
}
} else {
return UNDEFINED;
}
}
return o;
};
})();