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• This comparison shows the changes necessary to convert path

  → / @ 434

  → / @ 435

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Last modification

• Rev 435 2013-05-11 02:48:30
• Author: PointedEars

• Log message:

  * object.js
    - Module pattern up to including jsx.object.findNewProperty()
    - jsx.object.findNewProperty():
      + Fixed bogus `this' references (by improved module pattern)
      + DRY with property names
    - Updated unit tests

Ignore whitespace Rev 434 → Rev 435

/trunk/test/object.js
1,5 → 1,6
function runTests ()
{
var assert = jsx.test.assert;
var assertFalse = jsx.test.assertFalse;
var assertTrue = jsx.test.assertTrue;
886,6 → 887,17
code: function () {
assertFalse(jsx.object.hasPropertyValue({x: 42}, "42", {strict: true}));
}
},
{
feature: 'jsx.object.findNewProperty(…)',
desc: 'Returns the correct value',
code: function () {
assert(jsx.object.findNewProperty() === "a_");
assert(jsx.object.findNewProperty({}) === "a_");
assert(jsx.object.findNewProperty({"a_": true}) === "b_");
assert(jsx.object.findNewProperty({"a_": true, "b_": true}) === "c_");
}
}
]
});

/trunk/object.js
1214,7 → 1214,56
}
return false;
},
/**
* Returns the name of an unused property for an object.
*
* @param {Object} obj
* @param {Number} iLength
* Maximum property name length up to which an unused name
* is searched. The default is 256.
* @return {string}
* The name of a non-existing property of <code>o</code> if
* {@link Object#prototype.hasOwnProperty()} is supported, or
* the name of a property with value <code>undefined</code>
* if it is not supported; the empty string
* if there is no such property.
*/
findNewProperty: function (obj, iLength) {
if (!obj)
{
obj = jsx_object;
}
if (arguments.length < 2)
{
iLength = 256;
}
else
{
iLength = parseInt(iLength, 10);
}
var prefix = "";
while (prefix.length < iLength)
{
for (var i = "a".charCodeAt(0), max = "z".charCodeAt(0); i <= max; ++i)
{
var ch = String.fromCharCode(i);
var newName = prefix + ch + "_";
if (!_hasOwnProperty(obj, newName))
{
return newName;
}
}
prefix += "a";
}
return "";
}
};
return jsx_object;
1329,61 → 1378,6
};
/**
* Returns the name of an unused property for an object.
*
* @function
*/
jsx.object.findNewProperty = (function () {
var _hasOwnProperty = jsx.object._hasOwnProperty;
/**
* @param {Object} obj
* @param {Number} iLength
* Maximum property name length up to which an unused name
* is searched. The default is 256.
* @return {string}
* The name of a non-existing property of <code>o</code> if
* {@link Object#prototype.hasOwnProperty()} is supported, or
* the name of a property with value <code>undefined</code>
* if it is not supported; the empty string
* if there is no such property.
*/
return function (obj, iLength) {
if (!obj)
{
obj = this;
}
if (arguments.length < 2)
{
iLength = 256;
}
else
{
iLength = parseInt(iLength, 10);
}
var newName = "";
while (newName.length < iLength)
{
for (var i = "a".charCodeAt(0), max = "z".charCodeAt(0); i <= max; ++i)
{
var ch = String.fromCharCode(i);
if (!_hasOwnProperty(obj, newName + ch + "_"))
{
return newName + ch + "_";
}
}
newName += "a";
}
return "";
};
}());
/**
* Clears the handler for the proprietary <code>error</code> event.
*
* NOTE: This method has previously been provided by {@link debug.js};