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• Javascript ajax asynchronous question...

  - by Polaris878

  Hello, I'm wondering if anyone can help me understand some asynchronous javascript concepts... Say I make an asynch ajax call like so: xmlhttp=new XMLHttpRequest(); xmlhttp.onreadystatechange= myFoo; xmlhttp.open("GET",url,true); Here is my callback function: function myFoo() { if (xmlhttp.readyState==4) { if (xmlhttp.status==200) { // Success message } else { // some error message } } } Now, where and when does the execution path start again? Once I make the call to open(), does execution continue directly below the open() and another "thread" enters the asynch function once the ajax request has been completed? Or, does the browser wait for the request to complete, make the Asynch call, and then execution continues right after the open? Thanks!

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• Communicate between content script and options page

  - by Gaurang Tandon

  I have seen many questions already and all are about background page to content script. Summary My extension has an options page, and a content script. The content script handles the storage functionality (chrome.storage manipulation). Whenever, a user changes a setting in the options page, I want to send a message to the content script to store the new data. My code: options.js var data = "abcd"; // let data chrome.tabs.query({ active: true, currentWindow: true }, function (tabs) { chrome.tabs.sendMessage(tabs[0].id, "storeData:" + data, function(response){ console.log(response); // gives undefined :( }); }); content script js chrome.runtime.onMessage.addListener(function(request, sender, sendResponse) { // not working }); My question: Why isn't the approach not working? Is there any other (better) approach for this procedure.

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• Subprocess fails to catch the standard output

  - by user343934

  I am trying to generate tree with fasta file input and Alignment with MuscleCommandline import sys,os, subprocess from Bio import AlignIO from Bio.Align.Applications import MuscleCommandline cline = MuscleCommandline(input="c:\Python26\opuntia.fasta") child= subprocess.Popen(str(cline), stdout = subprocess.PIPE, stderr=subprocess.PIPE, shell=(sys.platform!="win32")) align=AlignIO.read(child.stdout,"fasta") outfile=open('c:\Python26\opuntia.phy','w') AlignIO.write([align],outfile,'phylip') outfile.close() I always encounter with these problems Traceback (most recent call last): File "<string>", line 244, in run_nodebug File "C:\Python26\muscleIO.py", line 11, in <module> align=AlignIO.read(child.stdout,"fasta") File "C:\Python26\Lib\site-packages\Bio\AlignIO\__init__.py", line 423, in read raise ValueError("No records found in handle") ValueError: No records found in handle

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• Run JavaScript after a DropDownList is DataBound

  - by Daniel Coffman

  I need to trigger a JavaScript function to be called AFTER a DropDownList on my ASP.NET WebForms page is DataBound, because the SelectedIndex of this DropDownList is the parameter to the JavaScript function. I've tried this various ways, but it seems that if I do it with pure JavaScript onload by using ClientScript.RegisterStartUpScript, the control can be found (because it hasn't been assigned a clientID yet?). If I use jQuery (document).ready { } it says that the DropDownList has no selectedIndex.value. So I need some JavaScript to run AFTER the control has a value set by the DataBind. How can I accomplish this? onChanged won't work because I need the function to fire on the first page load, with no user input. DataBinding the SelectedIndex of the DropDownList doesn't cause the JavaScript onChanged event to fire.

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• Ado.net ExecuteReader giving duplication while binding with datagrid

  - by Irvin Dua

  I am using below mentioned Ado.net function and resultset bind with grid view, however I am getting the duplicate rows in the resultset. Please help me out. Thanks Private _products As New List(Of Product) Public Property Products As List(Of BusinessObjects.Product) Get Return _products End Get Set(ByVal value As List(Of BusinessObjects.Product)) _products = value End Set End Property Public Function GetProductDetails() As List(Of Product) Dim product As New BusinessObjects.Product Using connection As New SqlConnection connection.ConnectionString = ConfigurationManager.ConnectionStrings("ConnectionString").ConnectionString connection.Open() Using Command As New SqlCommand("select * from T_product", connection) Dim rdr As SqlDataReader rdr = Command.ExecuteReader While rdr.Read() product.ProductID = rdr("ProductID") product.ProductName = rdr("ProductName") Products.Add(product) End While GridView1.DataSource = Products GridView1.DataBind() End Using End Using Return Products End Function

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• JqGrid doesn't work in ASP.NET MVC2

  - by Raouf

  I have a project in ASP.NET MVC1 using VB.NET controlers and JqGrid. it works fine under MVC1. After migrating the project to ASP.NET MVC2, the grid is no longer populated. It seems that there is some new restrictions on returned Jsonresult in MVC2. How to solve this in VB.NET. Controler function populating the jqgrid is something like this : Function GetGridRecordset(ByVal qry As String) As JsonResult Dim result = New JsonResult() ... ... Return result End Function Is there anyone who have a solution?

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• Using PHP variables inside SQL statements?

  - by Homer

  For some reason I can't pass a var inside a mysql statement. I have a function that can be used for multiple tables. So instead of repeating the code I want to change the table that is selected from like so, function show_all_records($table_name) { mysql_query("SELECT * FROM $table_name"); etc, etc... } And to call the function I use show_all_records("some_table") or show_all_records("some_other_table") depending on which table I want to select from at the moment. But it's not working, is this because variables can't be passed through mysql statements?

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• image_to_function in Rails

  - by FCastellanos

  I have this method on rails so that I have an image calling a javascript function def image_to_function(name, function, html_options = {}) html_options.symbolize_keys! tag(:input, html_options.merge({ :type => "image", :src => image_path(name), :onclick => (html_options[:onclick] ? "#{html_options[:onclick]}; " : "") + "#{function};" })) end I grabbed this code from the application helper of the redmine source code, the problem I'm having is that when I click on the image it's sending a POST, does some one know how can I stop that? This is how I'm using it <%= image_to_function "eliminar-icon.png", "mark_for_destroy(this, '.task')" %> Thanks alot!

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• Flash Hates Me. Error #1009: Cannot access a property or method of a null object reference

  - by sol

  I simply create a movie clip, put it on the stage and give it an instance name of char. Here's my document class, simple as can be: public class Test extends MovieClip { public function Test() { char.x = 1315; char.y = 459; addEventListener(Event.ENTER_FRAME, mouseListen); } private function mouseListen(e:Event) { char.x = mouseX; char.y = mouseY; } } And I get this error: TypeError: Error #1009: Cannot access a property or method of a null object reference. at com.me::Test/::mouseListen() How in the world is it possible that it knows what "char" is in the constructor but not in the mouseListen function? What else could it be?

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• iPhone: UIImageView not showing images

  - by George

  Hello, I've got UIImageView drawn in my nib-file and it's connected to a imageView iboutlet. I can load single pictures which will show up very nicely, but when it comes to drawing many images separately as like an animation, images won't show. I've got drawImage() function which takes NSData-objects(image data) and draws it to a screen(imageView). Main function has got for loop which loops 300 times as quickly as it can and each time it calls that drawImage function and passes different image data to it. Sometimes when I execute this code, last picture from that "animation" shows up, sometimes not at all. Maybe I need to schedule enough time for imageView so that the image can be shown? Hope someone has some clues. Thanks in advance!

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• Making element draggable with Android WebView (ideally, just with Javascript) ?

  - by GJTorikian

  I'm building an app with a build target of 1.5 . I have a variable, WebView browser, that is calling loadUrl to load a static HTML page from my assets folder. In that HTML page, the following JavaScript is defined: var supportsTouch = ('createTouch' in document); ... var w = $('wrapper'); w[supportsTouch ? 'touchmove' : 'onmousemove'] = move; w[supportsTouch ? 'touchend' : 'onmouseup'] = function(event){ dragging = false; }; where move is another function that handles the dragging. Unfortunately, this doesn't seem to work. I cannot figure out a concise list of which touch events are available to Android--is it ontouchmove, or touchmove? Am I supposed to set up an onTouchEvent call back in my Java code, which then launches the JavaScript function?

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• Another answer to the CAPTCHA problem?

  - by Xeoncross

  Most sites at least employ server access log checking and banning along with some kind of bot prevention measure like a CAPTCHA (those messed-up text images). The problem with CAPTCHAs is that they poss a threat to the user experience. Luckily they now come with user friendly features like refresh and audio versions. Anyway, like linux vs windows, it isn't worth the time of a spammer to customize and/or build a script to handle a custom CAPTCHA example that only pertains to one site. Therefore, I was wondering if there might be better ways to handle the whole CAPTCHA thing. In A Better CAPTCHA Peter Bromberg mentions that one way would be to convert the image to HTML and display it embedded in the page. On http://shiflett.org/ Chris simply asks users to type his name into an input. Examples like this are ways to simplifying the CAPTCHA experience while decreasing the value for spammers. Does anyone know of more good examples I could use or see any problem with the embedded image idea?

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• jquery document ready with Google

  - by cf_PhillipSenn

  This is how I load jQuery: <script src="http://www.google.com/jsapi"></script> <script type="text/javascript"> function OnLoad() { insert jQuery goodness here }; google.load("jquery", "1"); google.setOnLoadCallback(OnLoad); </script> But instead of function OnLoad() {, I'd like to use $(document).ready(function() {} so that it's like every example in every book and documentation snippet. How can I define: $ = jQuery?

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• Why does an onclick property set with setAttribute fail to work in IE?

  - by Aeon

  Ran into this problem today, posting in case someone else has the same issue. var execBtn = document.createElement('input'); execBtn.setAttribute("type", "button"); execBtn.setAttribute("id", "execBtn"); execBtn.setAttribute("value", "Execute"); execBtn.setAttribute("onclick", "runCommand();"); Turns out to get IE to run an onclick on a dynamically generated element, we can't use setAttribute. Instead, we need to set the onclick property on the object with an anonymous function wrapping the code we want to run. execBtn.onclick = function() { runCommand() }; BAD IDEAS: You can do execBtn.setAttribute("onclick", function() { runCommand() }); but it will break in IE in non-standards mode according to @scunliffe. You can't do this at all execBtn.setAttribute("onclick", runCommand() ); because it executes immediately, and sets the result of runCommand() to be the onClick attribute value, nor can you do execBtn.setAttribute("onclick", runCommand);

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• Building a complete online payment gateway like Paypal

  - by John Stewart

  So this question isn't about integrating an existing payment gateway into my site. This is more of a architectural question. I want to build a system similar to Paypal. Now I understand that Paypal offers a lot of features under the roof and I can't implement all of them at once. I want to implement the core functionality of Paypal and other such services. So my question is (rather discussion is) around how would one go about building such a system. Some points to discuss: Handle payments through existing banks. I am guessing that I would need access to local bank protocols to get this. Allow users to securely store and process their payments How does Paypal handle the transactions? Thoughts?

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• PhoneGap's vibrate() and beep() functions break in iPhone, Android emulators

  - by Steve Nay

  I have a PhoneGap app that I'm testing on webOS, Android, and iPhone. I'm using physical devices as well as emulators (the ones that come with their respective SDKs, not the PhoneGap emulator). Part of the code uses the navigator.notification.vibrate() and navigator.notification.beep() functions. All the physical devices I'm using either perform the behavior or ignore it if they're not capable (e.g., the iPod can't vibrate). However, the emulators behave differently. The Android emulator kills the app whenever the beep() function is called. The iPhone emulator causes the app to hang whenever the vibrate() function is called. Is there any way to get the emulators to ignore those function calls when they are unable to execute them? That is, is there a way to get them to degrade gracefully so I can test the app both places without having to modify the code specifically for the emulators?

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• jQuery AJAX converting variable string to html styled text

  - by sadmicrowave

  I've got an AJAX transmission of a variable string in my primary coding language (Visual FoxPro 9) that looks like this: AjaxResponse = CREATEOBJECT("Custom") lcMessage = "<li class='hello'>Hello</li>" AjaxResponse.AddProperty("Reply", lcMessage) Response.ContentType = "text/html" Response.Write(AjaxResponse.Reply) While using the jQuery function .ajax() I've created a success: function that looks like this: $.ajax({ url: 'index?Proc=GetUuserHistory', dataType: "html", success: function(data){ $("div#history-text").text(data); }; }); My problem is that the text inserting into 'div#history-text' is unformatted and contains the li tags still. I've tried substituting the .text for .prepend, .append, and .html with no luck...is there a way to convert this string back to html format after its been received using Ajax?

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• jQuery live change problem

  - by Milos

  When I click an element from list, jQuery get class from clicked element and write it in input field. Then value from input need to be written in div#content without any action. HTML: <ul> <li class="NewYork">New York</li> <li class="Paris">Paris</li> <li class="Moscow">Moscow</li> </ul> <input type="text" id="city" value="" /> <div id="content"></div> jQuery: $(document).ready(function() { $('ul li').live('click', function() { var select_value = $(this).attr('class'); $('input#city').val(select_value); return false; }); $('input#city').live('change', function() { var content = $(this).val(); $('#content').text(content+' is beautiful city'); }); });

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• T-SQL - Date rounding and normalization

  - by arun prakash

  Hi: I have a stored procedure that rounds a column with dates in (yyyy:mm:dd hh:mM:ss) to the nearest 10 minute handle (yyyy:mm:dd hh:mM) 20100303 09:46:3000 ------ 20100303 09:50 but i want to chage it to round it off to the nearest 15 minute handle: 20100303 09:46:3000 ------20100303 09:45 here is my code : IF OBJECT_ID(N'[dbo].[SPNormalizeAddWhen]') IS NOT NULL DROP PROCEDURE [dbo].[SPNormalizeAddWhen] GO CREATE PROCEDURE [dbo].[SPNormalizeAddWhen] As declare @colname nvarchar(20) set @colname='Normalized Add_When' if not exists (select * from syscolumns where id=object_id('Risk') and name=@colname) exec('alter table Risk add [' + @colname + '] datetime') declare @sql nvarchar(500) set @sql='update Risk set [' + @colname + ']=cast(DATEPART(yyyy,[add when]) as nvarchar(4)) + ''-'' + cast(DATEPART(mm,[add when]) as nvarchar(2)) + ''-'' + cast(DATEPART(dd,[add when]) as nvarchar(2)) + '' '' + cast(DATEPART(Hh,[add when]) as nvarchar(2)) + '':'' + cast(round(DATEPART(Mi,[add when]),-1) as nvarchar(2)) ' print @sql exec(@sql) GO

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• Modifying all HTTP requests on iPhoneOS with MobileSubstrate?

  - by Yifan

  I want to write a MobileSubstrate (http://www.iphonedevwiki.net/index.php/MobileSubstrate) addon that takes every HTTP request and modifies the URL. (The reason is very complicated and would take a while to explain, so just trust me that there's not an alternative). Basically, I need to know what's the best Objective-C message or C function that I should overwrite to intercept any HTTP request, modify the URL, and send the request back to the original function (this shouldn't be just the first request sent by an application, but any redirects too). I think it may be in NSURL or CFNetwork, but am not sure where exactly. This function should, when replaced, work with any apps and the OS itself.

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• Accessing HTML 5 Video Progress Event with jQuery

  - by jnolte

  Hello All, The below is for an HTML5 video player event. My partner and I have been stumped for a very large portion of the day on this issue and hope someone can lend some insight on the issue. We have been able to access the progress event with plain js as seen below but when trying to access this with jQuery we get undefined in console. Any help/ recommendations are greatly appreciated. //JS - Works like a charm document.addEventListener("DOMContentLoaded", init, false); function init() { var v = document.getElementById('test-vid'); console.log(v) v.addEventListener('progress', progress, false); } function progress(e) { console.log(e.lengthComputable + ' ' + e.total + ' ' + e.loaded); } // jQuery - NO BUENO - Undefined rendered in console var vid = $('#test-vid'); $(vid).bind("progress", function(e){ console.log(e.total + ' ' + e.loaded + ' ' + e.lengthComputable ); }); Thanks in advance, JN

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• Address component type in google maps geocoding

  - by user552828

  this is a part of my geocoding code. I want it to show only country of the selected place, but it shows all address components, My problem is I cant specify the address components object. There is a way of doing it that is written on documentation but I didnt understand, can you do it for me. if (geocoder) { geocoder.geocode({'latLng': latlng}, function(results, status) { if (status == google.maps.GeocoderStatus.OK) { var str = ""; $.each(results, function(){ str += "address components: <ul>" $.each(this.address_components, function(){ str +="<li>"+this.types.join(", ")+": "+this.long_name+"</li>"; }); str +="</ul>"; }); $("#geocode_info").html(str);

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• Is SQL used by PDO database independent?

  - by Pheter

  Different databases have slight variations in their implementations of SQL. Does PDO handle this? If I write an SQL query that I use with PDO to access a MySQL database, and later tell PDO to start using a different type of database, will the query stop working? Or will PDO 'convert' the query so that it continues to work? If PDO does not do this, are there any PHP libraries that allow me to write SQL according to a particular syntax, and then the library will handle converting the SQL so that it will run on different databases?

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• SecurityException when trying to export a java resource

  - by thecoop

  I'm trying to get the source of a java resource stored in an oracle database using this code (connecting as SYSTEM for testing): DECLARE javalob CLOB; BEGIN DBMS_LOB.CREATETEMPORARY(javalob, false); DBMS_JAVA.EXPORT_RESOURCE('RESOURCENAME', 'SCHEMA', javalob); DBMS_OUTPUT.PUT_LINE(javalob); END; But when I try to run it I get this: Java call terminated by uncaught Java exception: java.lang.SecurityException: cannot read <Resource Handle: RESOURCENAME|SCHEMA|301> because SYSTEM does not have execute privilege on it This thing is, I'm not sure how to grant permissions on <Resource Handle: RESOURCENAME|SCHEMA|301>, as this isn't a SQL or PL/SQL object. And why doesn't SYSTEM have access to it anyway?

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• Jquery mouseover change background color problem

  - by Sergio

  Jquery code: $(".menu_clickable").mouseover(function() { $(this).css({'background-color' : '#F00'}).mouseout(function(){ $(this).css({'background-color' : '#FFF'}); }); }); $(".menu_clickable").live('click', function() { $(this).css({'background-color' : '#FCC'}); }); HTML source: <div class="menu_clickable prof_info2" id="prof_info" >first</div> <div class="menu_clickable prof_info3" id="prof_info" >second</div> <div class="menu_clickable prof_info3" id="prof_info" >third</div> I'm trying to make the hover efect using Jquery and it is working fine but if I want to change the DIV background color when it's clicked it's not working, actually the clicked DIV change background color but it is stay like that while the cursor is on it. If I move it out it will restore the original background color. Why?

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