I have a HTML list of about 500 items and a "filter" box above it. I started by using jQuery to filter the list when I typed a letter (timing code added later): $('#filter').keyup( function() { var jqStart = (new Date).getTime(); var search = $(this).val().toLowerCase(); var $list = $('ul.ablist > li'); $list.each( function() { if ( $(this).text().toLowerCase().indexOf(search) === -1 ) $(this).hide(); else $(this).show(); } ); console.log('Time: ' + ((new Date).getTime() - jqStart)); } ); However, there was a couple of seconds delay after typing each letter (particularly the first letter). So I thought it may be slightly quicker if I used plain Javascript (I read recently that jQuery's each function is particularly slow). Here's my JS equivalent: document.getElementById('filter').addEventListener( 'keyup', function () { var jsStart = (new Date).getTime()...
Update at the end of 2011:
ReplyDeleteFB.api('/me/permissions', function (response) {
console.log(response);
} );
console output:
{
data: [
{
create_note: 1,
installed: 1,
photo_upload: 1,
publish_stream: 1,
share_item: 1,
status_update: 1,
video_upload: 1,
}
]
}
this solution is deprecated at the end of 2011, please use the answer that is marked as accepted above
ReplyDeletefound a solution myself
function check_ext_perm(session,callback) {
var query = FB.Data.query('select publish_stream,read_stream from permissions where uid={0}', session["uid"]);
query.wait(function(rows) {
if(rows[0].publish_stream == 1 && rows[0].read_stream == 1) {
callback(true);
} else {
callback(false);
}
});
};
this will check for publish_streamand read_stream
example use:
check_ext_perm(response.session, function(isworking) {
if(isworking) {
// post something to wall
} else {
// ask for login
}
});
Generalized choise's function,
ReplyDeletefunction check_permissions (permissions, uid, cb) {
FB.Data
.query('select {0} from permissions where uid={1}', permissions, uid)
.wait(function (res) {
if (!res || res.length < 1) return cb(false);
var row = res[0];
var aperm = permissions.split(',');
for (var i = 0; i < aperm.length; i++) {
if (row[aperm[i]] != 1) return cb(false);
}
return cb(true);
});
}
Calls the callback with true if the user has all of the permissions, otherwise calls the callback with false.
The responses here that use FB.Data.query are to be avoided as this point, as Facebook has deprecated FB.Data.query entirely. The FB.api(/me/permissions ...) solution seems best.
ReplyDeleteFB.ui({
ReplyDeletemethod: 'permissions.request',
perms: 'user_website',
display: 'popup'
},function(response) {
alert(response.toSource());
if (response && response.perms) {
alert('Permissions granted: '+response.perms);
} else if (!response.perms){
alert('User did not authorize permission(s).');
}
});