[jQuery] Re: Scoping issue with load and call back function.
Josh and all,
I figured out a way around the issue using the ajaxStop function.
The ajaxStop event is triggered when all outstanding requests (load in
this case) are complete.
When this happens all the tables I wish to load are loaded to the
document.
My original code was trying to grab information with the load callback
function and store in a global variable.
This will not work.
Instead, I load the desired pages to a hidden element. Then when the
pages are loaded (ajaxStop event triggered), I can then process the
tables and pull out the desired information and build a new table.
There may be a better way to do this, perhaps on the server side
rather than on the client in the document. But at the moment this is
what I need.
Thanks for the help.
$('#display_merge').ajaxStop(function() {
};
On May 7, 12:31 pm, Josh Nathanson joshnathan...@gmail.com wrote:
Well it's a little tricky because of the asynchronicity. The way I might
handle it is to set some kind of isLoaded global object that gets
poplulated each time an async call returns. You more or less already have
that. Then, create a polling function using setInterval or setTimeout
that checks every 500ms or so to see if that isLoaded object is completely
populated. Once you determine that it is, then generate the combined table.
-- Josh
-Original Message-
From: jquery-en@googlegroups.com [mailto:jquery...@googlegroups.com] On
Behalf Of Stever
Sent: Thursday, May 07, 2009 4:28 AM
To: jQuery (English)
Subject: [jQuery] Re:Scopingissue with load and call back function.
Josh,
First the firstload=0 and not resetting the variable was left off. But
ultimately is unrelated to the asynchronous problem you pointed out.
Asynchronous loading makes a big difference here. As a pretty recent
user of jquery, I obviously designed this code wrong.
So here is what I what to do. I have multiple web pages on a server
that have summary result tables for different products.
I want to read each of these summary tables and combine the results
into one single table.
My thought was to use Jquery Load to load each table and read the
information and store into the global arrays, TableCell, TableRow and
TableColumn.
Apparently this approach is flawed.
Can you or someone on this group recommend/outline a way to accomplish
this relatively simple task?
Thanks!!
Steve
On May 6, 7:13 pm, Josh Nathanson joshnathan...@gmail.com wrote:
OK it looks like you have a few things to sort out here.
One thing is that you have to remember that load is asynchronous. So when
that is fired the rest of your code will continue along its merry way. In
other words the loop will keep looping independent of the callback
function
firing. My hunch is that this will give you unexpected values for the
variable [i] in the load callback function. Because of this you will
probably have to do some refactoring to get the results you're looking
for.
Not sure though if you intend to run that load on every iteration of the
loop or just the first one.
Also you may have left this out, but I see you have a firstload = 1
declaration, but then you don't set it to 0. This could also be messing
up
your results as it will run every time unless you set it to 0 somewhere.
Definitely leave the variable declarations outside document ready as in
your
second email.
-- Josh
-Original Message-
From: jquery-en@googlegroups.com [mailto:jquery...@googlegroups.com] On
Behalf Of Stever
Sent: Wednesday, May 06, 2009 4:31 PM
To: jQuery (English)
Subject: [jQuery] Re:Scopingissue with load and call back function.
Josh thanks for the quick response.
I tried putting the variables
var TableCells =[,];
var TableRowName =[,];
var TableColName =[,];
outside the document ready function. Originally. (not redefined with
var inside document ready shown here).
script type=text/javascript src=http://www.hou.asp.ti.com/
sparcit_data_reports//js/jquery.js/script
script type=text/javascript
var devList = [
PART_1
];
var TableCells =[,];
var TableRowName =[,];
var TableColName =[,];
$(document).ready(function(){
$.ajaxSetup({cache: false}) ;
var firstLoad = 1;
for( var i =0; i devList.length; i++)
{
// set the path
var path = url + devList[i] ;
var colName =[];
var rowName =[];
var cellValue = [];
//load the page but collect the table info
if (firstLoad == 1)
{
$('#display').load(path,
function(){
manipulate tables and put data in Global
Array
TableCells[i] = cellValue;
TableRowName[i] = rowName;
TableColName[i] = colName;
});
var lenTable2 = TableColName[i].length;
}
}
});
So where I
[jQuery] Re: Scoping issue with load and call back function.
Josh,
First the firstload=0 and not resetting the variable was left off. But
ultimately is unrelated to the asynchronous problem you pointed out.
Asynchronous loading makes a big difference here. As a pretty recent
user of jquery, I obviously designed this code wrong.
So here is what I what to do. I have multiple web pages on a server
that have summary result tables for different products.
I want to read each of these summary tables and combine the results
into one single table.
My thought was to use Jquery Load to load each table and read the
information and store into the global arrays, TableCell, TableRow and
TableColumn.
Apparently this approach is flawed.
Can you or someone on this group recommend/outline a way to accomplish
this relatively simple task?
Thanks!!
Steve
On May 6, 7:13 pm, Josh Nathanson joshnathan...@gmail.com wrote:
OK it looks like you have a few things to sort out here.
One thing is that you have to remember that load is asynchronous. So when
that is fired the rest of your code will continue along its merry way. In
other words the loop will keep looping independent of the callback function
firing. My hunch is that this will give you unexpected values for the
variable [i] in the load callback function. Because of this you will
probably have to do some refactoring to get the results you're looking for.
Not sure though if you intend to run that load on every iteration of the
loop or just the first one.
Also you may have left this out, but I see you have a firstload = 1
declaration, but then you don't set it to 0. This could also be messing up
your results as it will run every time unless you set it to 0 somewhere.
Definitely leave the variable declarations outside document ready as in your
second email.
-- Josh
-Original Message-
From: jquery-en@googlegroups.com [mailto:jquery...@googlegroups.com] On
Behalf Of Stever
Sent: Wednesday, May 06, 2009 4:31 PM
To: jQuery (English)
Subject: [jQuery] Re:Scopingissue with load and call back function.
Josh thanks for the quick response.
I tried putting the variables
var TableCells =[,];
var TableRowName =[,];
var TableColName =[,];
outside the document ready function. Originally. (not redefined with
var inside document ready shown here).
script type=text/javascript src=http://www.hou.asp.ti.com/
sparcit_data_reports//js/jquery.js/script
script type=text/javascript
var devList = [
PART_1
];
var TableCells =[,];
var TableRowName =[,];
var TableColName =[,];
$(document).ready(function(){
$.ajaxSetup({cache: false}) ;
var firstLoad = 1;
for( var i =0; i devList.length; i++)
{
// set the path
var path = url + devList[i] ;
var colName =[];
var rowName =[];
var cellValue = [];
//load the page but collect the table info
if (firstLoad == 1)
{
$('#display').load(path,
function(){
manipulate tables and put data in Global
Array
TableCells[i] = cellValue;
TableRowName[i] = rowName;
TableColName[i] = colName;
});
var lenTable2 = TableColName[i].length;
}
}
});
So where I try to access the new length of TableColName[i] I get that
this variable is undefined.
Actually while debugging, I find that variable i defined in the loop
outside the load, is NOT available inside the load function.
It is all very confusing.
:-(
On May 6, 6:10 pm, Josh Nathanson joshnathan...@gmail.com wrote:
When you say you get undefined outside the load function, do you mean
outside $(document).ready, or inside $(document).ready?
They should not be accessible outside document.ready, because of the
closure
caused by passing the anonymous function to document.ready, and because
you
use var to declare them inside that function.
If you want them to be accessible globally, you'll have to declare them
outside document.ready.
-- Josh
-Original Message-
From: jquery-en@googlegroups.com [mailto:jquery...@googlegroups.com] On
Behalf Of Stever
Sent: Wednesday, May 06, 2009 3:54 PM
To: jQuery (English)
Subject: [jQuery]Scopingissuewith load and call back function.
I am a relative newbie to Jquery and I am getting somescopingissues
I can't figure out.
I was hoping for some advice.
Basically I am trying to load multiple documents that have HTML tables
and then parse the tables and redisplay in a new format. Merging
elements from the different documents.
So basically I build the url path for a set of devices and load
them. I thought in the load function I could collect elements into
global variables and manipulate in the final document. But is not
working.
The variables TableCells, TableRowName and TableColName are what I
haveissueswith.
$(document).ready
[jQuery] Scoping issue with load and call back function.
I am a relative newbie to Jquery and I am getting some scoping issues
I can't figure out.
I was hoping for some advice.
Basically I am trying to load multiple documents that have HTML tables
and then parse the tables and redisplay in a new format. Merging
elements from the different documents.
So basically I build the url path for a set of devices and load
them. I thought in the load function I could collect elements into
global variables and manipulate in the final document. But is not
working.
The variables TableCells, TableRowName and TableColName are what I
have issues with.
$(document).ready(function(){
$.ajaxSetup({cache: false}) ;
var TableCells=[,];
var TableRowName =[,];
var TableColName =[,];
for( var i =0; i devList.length; i++)
{
// set the path
var path = prefix + yield_dir + devList[i] +'/' + smslot_yield;
//clear the display area
$('#display').html();
var colName =[];
var rowName =[];
var cellValue = [];
//load the page but collect the table info
if (firstLoad == 1)
{
$('#display').load(path,
function(){
manipulate tables and put data in
Global Array
TableCells[i] = cellValue;
TableRowName[i] = rowName;
TableColName[i] = colName;
});
}
}
});
So the variables are defined in the document ready scope. (I even
tried outside that as well)
var TableCells=[,];
var TableRowName =[,];
var TableColName =[,];
I set these variables in the load function scope and they are
accessible there and work fine.
However when I try to access outside the load function the variables
are undefined.
Can you tell what I am missing?
Thanks,
Steve
[jQuery] Re: Scoping issue with load and call back function.
Josh thanks for the quick response.
I tried putting the variables
var TableCells=[,];
var TableRowName =[,];
var TableColName =[,];
outside the document ready function. Originally. (not redefined with
var inside document ready shown here).
script type=text/javascript src=http://www.hou.asp.ti.com/
sparcit_data_reports//js/jquery.js/script
script type=text/javascript
var devList = [
PART_1
];
var TableCells=[,];
var TableRowName =[,];
var TableColName =[,];
$(document).ready(function(){
$.ajaxSetup({cache: false}) ;
var firstLoad = 1;
for( var i =0; i devList.length; i++)
{
// set the path
var path = url + devList[i] ;
var colName =[];
var rowName =[];
var cellValue = [];
//load the page but collect the table info
if (firstLoad == 1)
{
$('#display').load(path,
function(){
manipulate tables and put data in Global
Array
TableCells[i] = cellValue;
TableRowName[i] = rowName;
TableColName[i] = colName;
});
var lenTable2 = TableColName[i].length;
}
}
});
So where I try to access the new length of TableColName[i] I get that
this variable is undefined.
Actually while debugging, I find that variable i defined in the loop
outside the load, is NOT available inside the load function.
It is all very confusing.
:-(
On May 6, 6:10 pm, Josh Nathanson joshnathan...@gmail.com wrote:
When you say you get undefined outside the load function, do you mean
outside $(document).ready, or inside $(document).ready?
They should not be accessible outside document.ready, because of the closure
caused by passing the anonymous function to document.ready, and because you
use var to declare them inside that function.
If you want them to be accessible globally, you'll have to declare them
outside document.ready.
-- Josh
-Original Message-
From: jquery-en@googlegroups.com [mailto:jquery...@googlegroups.com] On
Behalf Of Stever
Sent: Wednesday, May 06, 2009 3:54 PM
To: jQuery (English)
Subject: [jQuery]Scopingissuewith load and call back function.
I am a relative newbie to Jquery and I am getting somescopingissues
I can't figure out.
I was hoping for some advice.
Basically I am trying to load multiple documents that have HTML tables
and then parse the tables and redisplay in a new format. Merging
elements from the different documents.
So basically I build the url path for a set of devices and load
them. I thought in the load function I could collect elements into
global variables and manipulate in the final document. But is not
working.
The variables TableCells, TableRowName and TableColName are what I
have issues with.
$(document).ready(function(){
$.ajaxSetup({cache: false}) ;
var TableCells =[,];
var TableRowName =[,];
var TableColName =[,];
for( var i =0; i devList.length; i++)
{
// set the path
var path = prefix + yield_dir + devList[i] +'/' + smslot_yield;
//clear the display area
$('#display').html();
var colName =[];
var rowName =[];
var cellValue = [];
//load the page but collect the table info
if (firstLoad == 1)
{
$('#display').load(path,
function(){
manipulate tables and put data in
Global Array
TableCells[i] = cellValue;
TableRowName[i] = rowName;
TableColName[i] = colName;
});
}
}
});
So the variables are defined in the document ready scope. (I even
tried outside that as well)
var TableCells =[,];
var TableRowName =[,];
var TableColName =[,];
I set these variables in the load function scope and they are
accessible there and work fine.
However when I try to access outside the load function the variables
are undefined.
Can you tell what I am missing?
Thanks,
Steve
[jQuery] A problem setting timeout feature in AJAX.
Hello,
I have a jquery HTML page which loads a form.
The form has a bunch of settings, but eventually the form gets
submitted using a post command (see below) which returns and HTML
page which was built by a script running on the server.
This works fine, except when the script runs longer than 5 minutes.
The post command just returns nothing.
I tried using the timeout command in the high level page as follows:
$.ajaxSetup({cache: false,
timeout: 1800 }) ;
But this does not seem to work. Does anyone have a suggestion?
Here is the post command:
$.post('/cgi-bin/tw_lookup_3.cgi', lookupData, function(data){
// $('#results').load( prefix + user_name + /
TW_LOOKUP_RESULTS.html);
// $('#results a').attr('target','_blank').css
('backgroundColor','#d5e9d7');
var page = $(data).find('input[name=result_dir]').val();
$('#results').load( page + /TW_LOOKUP_RESULTS.html);
$('#SubmitQuery').attr('disabled',false);
$('#SubmitQuery').val('Submit Query');
$('#SubmitQuery').css('backgroundColor','');
$('#SubmitQuery').css('color','');
},html);
[jQuery] Re: Jquery load not getting updated pages.....
Hey everybody. Thanks for all the help!
I am using the $.ajaxSetup({cache:false}) option.
It works great.
Looks like I need to study up on the ajax functions.
Always more stuff to learn!
Thanks.
Steve
On Oct 22, 2:26 am, 汪杰 [EMAIL PROTECTED] wrote:
you can set :
$.ajaxSetup({cache: false})
or:
$.ajaxSetup({beforeSend:
function(e,xhr,s){xhr.setRequestHeader(If-Modified-Since, new Date(0));}})
or:
$('#display').ajaxSend(function(e,xhr,s){xhr.setRequestHeader(If-Modified-Since,
new Date(0));}).load('../forms/test_form_1.html');
[jQuery] Jquery load not getting updated pages.....
Hello,
I spent about an hour trying to figure out why a form I was loading to
a web page was not updating.
In my web page I have a navigation button tool, when I click I want to
load a form into the #display div.
$(document).ready(function(){
.. a bunch of code.
$('#menu li.tool').click(function() {
$('#display #product').remove();
$('#menu li[device=device]').removeAttr('clicked');
$('#display').load('../forms/test_form_1.html');
});
.. remaining code
};
I call up the page and click the tool button and the form displays no
problem.
However, later I made changes to the form (test_form_1.html) and they
were not included, even after refreshing the page.
I even removed the html file and it still loads!
Apparently this file is saved in the cache, how do I make sure
everytime I click on the tool button I get the latest page?
Steve
[jQuery] Re: Jquery load not getting updated pages.....
Thanks for the message. Now I'll show you how new I am at this stuff. :-) How do I update the headers. Apparently this is done from the server side. Do I need to do something with the load function, (I know you said I could add a random query statement to the URL in the load), but obviously that's not updating the headers. Do I have to do something with the HTML page itself that I am loading. I am confused because it seems like the HTTP headers and between the load and the HTML page. Thanks again for your help. Stever On Oct 21, 1:01 pm, Bil Corry [EMAIL PROTECTED] wrote: Stever wrote on 10/21/2008 11:34 AM: Apparently this file is saved in the cache, how do I make sure everytime I click on the tool button I get the latest page? Via the headers, have the page expire in the past and set the cache-control headers to no-cache: Expires: Thu, 11 Jun 1998 13:17:30 GMT Cache-Control: no-store, no-cache, must-revalidate, no-transform, max-age=0, post-check=0, pre-check=0 Pragma: no-cache Some people instead choose to make the URL dynamic by appending a random query string using the current milliseconds (or something similar). I don't use that method, so maybe someone who does it that way can respond. - Bil
[jQuery] Re: Jquery load not getting updated pages.....
Bil, Thanks for the help. I think I can figure it out from here.I have several options The server is Apache and I am using perl cgi on the server. However the confusion I have is that on the Jquery load you aren't using the server get/post methods. You just give it a URL. And the page I am loading static (pre-built) , well it's a form that as a get/post method embedded in it. But the form itself is just a static html file. Anyway I appreciate the help. Thanks! Steve On Oct 21, 6:39 pm, Bil Corry [EMAIL PROTECTED] wrote: Stever wrote on 10/21/2008 6:33 PM: How do I update the headers. Apparently this is done from the server side. It depends on your server-side language and web server. Apache can set headers using mod_headers: http://httpd.apache.org/docs/2.0/mod/mod_headers.html#header Depending on your server-side language (Lasso, PHP, Python, Perl, etc) you'd have to look it up as it differs per language. I know you said I could add a random query statement to the URL in the load You can do that instead of setting the headers. Might be easier if you're unsure of how to set response headers. - Bil
[jQuery] Web page navigation question....
Hello, I am new to Javascript and Jquery and I have a question on a web page I am building. I have an interactive form where I have two columns, one column holds the form the second holds the results. When the user comes to the page, the form and the result window are blank. The form allows the user to query a database and retrieve information and the information is displayed in the results window. So here is my problem. After the the form is filled out and submited, a cgi script runs and submits the query to a database and an HTML is generated on the server. I have a callback on submit button to display the result page using the load function. This works fine. However on the page that is loaded has links for more information. If I drill down to these links. the new information is loaded to the current browser and not in the result panel. But not only that if I hit the back button, I go to the original form page and all the information is blank. 1) How can I go back to the form page with query results? 2) Even better, when I click on the link in the results area, can the new information be loaded to this area AND have the ability when I hit the back button to show the previous results? Thanks for any help or suggestions. Steve
