javascript - Why would .append randomly fail in jquery? -

-

i'm using jquery add elements blank list.

on page have:

<ul id="mylist"> </ul>

and go through loop in script that's called dynamically created event handler. (it's "ondrop" of list item having been sorted drag operation) 

var mylistitemhtml; (var = 0 ; < 5 ; i++) {   mylistitemhtml += '<li id=listitem'+i+'>this item number'+i+'</li>'; }  $('#mylist').append(mylistitemhtml);

and if check after...

if ($('#mylist li').length == 0 ) {   alert('going crash since i'm expecting list items') }

roughly 95% of time list populated, 5% of time hit alert that's going cause exception later.

has run this? there callback or way know when/if append happens?

var mylistitemhtml; (var = 0 ; < 5 ; i++) {   $('#mylist').append('<li id=listitem'+i+'>this item number'+i+'</li>'); }

try appending inside loop.

if ($('#mylist li').length == 0 ) {   alert('going crash since i\'m expecting list items') }

you need \ before ' doesn't conflict.

edit: jsfiddle shows "undefined" http://jsfiddle.net/gyere/1/


Comments

Post a Comment

Popular posts from this blog

java - SNMP4J General Variable Binding Error -

-
i trying use snmp4j snmp bulkget. when ever use snmp4j make call returned responseevent error says "general variable binding error" , data returned equal null. to debug: print out, console, exact oid , version number using in snmp4j. use printed out data snmpwalk on command line. valid results. know sending snmp4j correct pdu correct oid, version number, max repititions, etc. i have used snmp4j , code wrote succesffuly monitor other devices years. don't know different time. leaving me stumped. why "general variable binding error?" causes error? ideas debug? can reproduced? if so, first action should using wireshark or microsoft network monitor capture network packets. my guess agent gives generr response, not surprising, http://www.ietf.org/rfc/rfc1157.txt
Read more

sql server - python to mssql encoding problem -

-
Image
greetings by using pymssql library, want write data mssql database encounter encoding issues. here sample code write db: # -*- coding: utf-8 -*- import _mssql .... connection info data here .... def mssql_connect(): return _mssql.connect(server=host, user=username, password=pass, database=db, charset="utf-8") con = mssql_connect() insert_ex_sql = "insert mydatabsae (id, programname, programdetail) values (1, 'test characters ÜŞiçÇÖö', 'löşüiiğĞü');" con.execute_non_query(insert_ex_sql) con.close() sadly data written db corrupted: the collacation of mssql db is: turkish_ci_as how can solved? here possible solution : the key insert_ex_sq.encode('your language encoder') . try instead: con.execute_non_query(insert_ex_sq.encode('your language encoder'))
Read more

Determine if a XmlNode is empty or null in C#? -

-
the following code takes xmlnode data type , populates dataset object xmlnode content. write dataset's content file. public void populatedataset(xmlnode node) { xmlnodereader reader = new xmlnodereader(node); dataset ds = new dataset(); ds.readxml(reader); system.guid guid = system.guid.newguid(); string name = string.format("{0}{1}_{2}.xml", utility.xmloutputpath, utility.xmloutputfilename, guid.tostring()); //need write "node empty" file if xmlnode object empty of null ds.writexml(name, xmlwritemode.ignoreschema); } the problem encountered 1 scenario not write content file. how determine if xmlnode object null or empty? you can check if node parameter null or has innertext or innerxml properties null or empty, when enter method before creating xmlnodereader .
Read more