Code snippets: Difference between revisions
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(Renamed xpath function to $x and cleaned it up a bit, added serialize/deserialize.) |
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function $x(p, context) { | function $x(p, context) { | ||
if (!context) context = document; | if (!context) context = document; | ||
var arr = [] | var i, arr = [], xpr = document.evaluate(p, context, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null); | ||
for (i = 0; item = xpr.snapshotItem(i); i++) arr.push(item); | |||
for (i=0; item = xpr.snapshotItem(i); i++) arr.push(item); | |||
return arr; | return arr; | ||
} | } | ||
Revision as of 21:32, 23 March 2007
XPath helper
function $x(p, context) {
if (!context) context = document;
var i, arr = [], xpr = document.evaluate(p, context, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
for (i = 0; item = xpr.snapshotItem(i); i++) arr.push(item);
return arr;
}
Run a particular xpath expression p against the context node context (or the document, if not provided).
Return the results as an array.
Serialize/deserialize
Used to store and retrieve multiple values (typically as a serialized hash) in a single GM_getValue slot.
function deserialize(name, def) {
return eval(GM_getValue(name, (def ? def : '({})')) );
}
function serialize(name, val) {
GM_setValue(name, uneval(val));
}
Example usage:
var settings = {a: 1, b: 2, c: 3};
serialize('test', settings);
var _settings = deserialize('test');
// now "settings == _settings" should be true
