Created
October 24, 2008 15:42
-
-
Save os0x/19461 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
// $XA | |
// | |
// $XA(exp, context, resolver).forEach(function(node){}); | |
function $XA (exp, context, resolver) { | |
context || (context = document); | |
var XPE = new XPathEvaluator(); | |
var Doc = context.ownerDocument || context, expr = XPE.createExpression(exp, resolver ? resolver : | |
Doc.documentElement.namespaceURI ? function(prefix) { | |
return XPE.createNSResolver(Doc.documentElement).lookupNamespaceURI(prefix) || | |
context.namespaceURI || document.documentElement.namespaceURI || ""; | |
} : null); | |
var result = expr.evaluate(context, XPathResult.ANY_TYPE, null); | |
switch (result.resultType) { | |
case XPathResult.STRING_TYPE : return result.stringValue; | |
case XPathResult.NUMBER_TYPE : return result.numberValue; | |
case XPathResult.BOOLEAN_TYPE: return result.booleanValue; | |
case XPathResult.UNORDERED_NODE_ITERATOR_TYPE: | |
result = expr.evaluate(context, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, result); | |
var length = result.snapshotLength; | |
return { | |
toA:function(){ | |
for (var i = 0, len = length, res = new Array(len); i < len; ++i) | |
res[i] = result.snapshotItem(i); | |
return res; | |
}, | |
forEach:function(func, thisObject){ | |
for (var i = 0, len = length; i < len; ++i) | |
func.call(thisObject,result.snapshotItem(i), i); | |
}, | |
map:function(func, thisObject){ | |
for (var i = 0, len = length, res = []; i < len; ++i) | |
res.push(func.call(thisObject,result.snapshotItem(i))); | |
return res; | |
}, | |
filter:function(func, thisObject){ | |
for (var i = 0, len = length, res = [], node; i < len; ++i) | |
if (func.call(thisObject,node = result.snapshotItem(i))) res.push(node); | |
return res; | |
}, | |
mapfilter:function(func, thisObject){ | |
for (var i = 0, len = length, res = [], node; i < len; ++i) | |
if (node = func.call(thisObject,result.snapshotItem(i))) res.push(node); | |
return res; | |
} | |
}; | |
} | |
return null; | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment