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  • Why does $('#id') return true if id doesn't exist?

    - by David
    I always wondered why jQuery returns true if I'm trying to find elements by id selector that doesnt exist in the DOM structure. Like this: <div id="one">one</div> <script> console.log( !!$('#one') ) // prints true console.log( !!$('#two') ) // is also true! (empty jQuery object) console.log( !!document.getElementById('two') ) // prints false </script> I know I can use !!$('#two').length since length === 0 if the object is empty, but it seems logical to me that a selector would return the element if found, otherwise null (like the native document.getElementById does). F.ex, this logic can't be done in jQuery: var div = $('#two') || $('<div id="two"></div>'); Wouldnt it be more logical if the ID selector returned null if not found? anyone?

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  • Document.oncontextmenu, component is not available (firefox)

    - by Tom J Nowell
    I have a script for a website, and one of the things ti does right at the end if attempt to disable an anti-right click protection in a website if($("span[class=MembersNameDisplay]").exists()){ var list_row = document.getElementsByTagName('script'); if(list_row != null){ list_row[0].parentNode.removeChild(list_row[0]); } } document.oncontextmenu=new Function("return true"); In google chrome this works, however in firefox with greasemonkey, the last line fails and the protection is not removed. Error: Component is not available Line: 171 How do I fix this, and why does it fail under firefox?

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  • Dependent checkbox, do you think this can be simplified more?

    - by Louie Miranda
    I have the following code which is working, I was wondering if this can simplified more. Demo: http://jsfiddle.net/TnpNV/8/ <form name="cbform"> <input type="checkbox" value="1" name="one" id="one" /> one<br /> <input type="checkbox" value="1" name="two" id="two" /> two </form>? <script> $('#one, #two').click(function(event) { var checked = $(this).is(':checked'); if (checked) { $('#one').attr('checked', true); $('#two').attr('checked', true); } else { $('#one').attr('checked', false); $('#two').attr('checked', false); } }); </script> It's basically a two checkbox that is dependent on each other. Jquery was used to check and uncheck them. Regards

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  • Draw and move a point over an image in python

    - by frx08
    Hi all I have to do a little script in Python. In this script I have a variable (that represents a coordinate) that is continuously updated to a new value. So I have to draw a red point over a image and update the point position every time the variable that contains the coordinate is updated. I tried to explain what I need doing something like this but obviously it doesn't works: import Tkinter, Image, ImageDraw, ImageTk i=0 root = Tkinter.Tk() im = Image.open("img.jpg") root.geometry("%dx%d" % (im.size[0], im.size[1])) while True: draw = ImageDraw.Draw(im) draw.ellipse((i, 0, 10, 10), fill=(255, 0, 0)) pi = ImageTk.PhotoImage(im) label = Tkinter.Label(root, image=pi) label.place(x=0, y=0, width=im.size[0], height=im.size[1]) i+=1 del draw someone may help me please? thanks very much!

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  • Simple getJSON does not work...

    - by user54197
    JSON function(Index) does not fire. Any Ideas? <script type="text/javascript"> $(document).ready(function() { alert("This alert is displayed :("); $("form[action$='GetQuote']").submit(function() { $.getJSON($(this).attr("action"), $(this).serialize(), function(Result) { alert("This alert is not shown :("); $("#name").html(Result.name); $("#address").html(Result.address); }); return false; }); }); </script> CONTROLLERS... public JsonResult GetQuote(string dataName) { if (dataName != "" || dataName != null) return new JsonResult { Data = new Result { name = "Hello", address = "World" } }; else return null; }

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  • manipulate content inserted by ajax, without using the callback

    - by Cody
    I am using ajax to insert a series of informational blocks via a loop. The blocks each have a title, and long description in them that is hidden by default. They function like an accordion, only showing one description at a time amongst all of the blocks. The problem is opening the description on the first block. I would REALLY like to do it with javascript right after the loop that is creating them is done. Is it possible to manipulate elements created ofter an ajax call without using the callback? <!-- example code--> <style> .placeholder, .long_description{ display:none;} </style> </head><body> <script> /* yes, this script is in the body, dont know if it matters */ $(document).ready(function() { $(".placeholder").each(function(){ // Use the divs to get the blocks var blockname = $(this).html(); // the contents if the div is the ID for the ajax POST $.post("/service_app/dyn_block",'form='+blockname, function(data){ var divname = '#div_' + blockname; $(divname).after(data); $(this).setupAccrdFnctly(); //not the actual code }); }); /* THIS LINE IS THE PROBLEM LINE, is it possible to reference the code ajax inserted */ /* Display the long description in the first dyn_block */ $(".dyn_block").first().find(".long_description").addClass('active').slideDown('fast'); }); </script> <!-- These lines are generated by PHP --> <!-- It is POSSIBLE to display the dyn_blocks --> <!-- here but I would really rather not --> <div id="div_servicetype" class="placeholder">servicetype</div> <div id="div_custtype" class="placeholder">custtype</div> <div id="div_custinfo" class="placeholder">custinfo</div> <div id="div_businfo" class="placeholder">businfo</div> </body>

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  • How to use SQL - INSERT...ON DUPLICATE KEY UPDATE?

    - by Probocop
    Hi, I have a script which captures tweets and puts them into a database. I will be running the script on a cronjob and then displaying the tweets on my site from the database to prevent hitting the limit on the twitter API. So I don't want to have duplicate tweets in my database, I understand I can use 'INSERT...ON DUPLICATE KEY UPDATE' to achieve this, but I don't quite understand how to use it. My database structure is as follows. Table - Hash id (auto_increment) tweet user user_url And currently my SQL to insert is as follows: $tweet = $clean_content[0]; $user_url = $clean_uri[0]; $user = $clean_name[0]; $query='INSERT INTO hash (tweet, user, user_url) VALUES ("'.$tweet.'", "'.$user.'", "'.$user_url.'")'; mysql_query($query); How would I correctly use 'INSERT...ON DUPLICATE KEY UPDATE' to insert only if it doesn't exist, and update if it does? Thanks

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  • creating existing users on AWS when they don't have a group

    - by Jon Strayer
    It seems when chef creates a user with the id of "foobar" it also creates a group with the id of "foobar". AWS doesn't do that. So, when I run my create users script via Opsworks it blows up on the first user that already exists because the group doesn't. I thought there was a way to say create the user but not the group, but I can't find it. What's the best way to solve this problem? Can I: Tell chef to not create the user's group? Tell chef to create it if the user exists but the group doesn't? Write a script that finds the existing users and creates groups for them? Something else?

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  • How to get <select> options either (value or text) using jQuery

    - by Muhammad Sajid
    Hello, i have a code for <select id='list'> <option value='1'>Option A</option> <option value='2'>Option B</option> <option value='3'>Option C</option> </select> and i want that how ever i select any option, it will show in an alert message. i have try <script type='text/javascript'> //var value = $("#list option[value=2]").text(); //var value = $("#list option:selected").text(); //var value = $('#list').val(); var value = $(this).val(); alert(value); </script> but fail.

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  • Why would ftp_connect() return false on production server if it works elsewhere for connecting to th

    - by letseatfood
    I have a script that uses ftp_connect() among other FTP PHP functions for uploading a file. ftp_connect() works when executed on my local development server for connecting to a remote FTP server. The same script, when executed on the remote server does not work for connecting to the exact same FTP server. Could somebody please point me in the right direction? Thanks! Here is the code: error_reporting(E_ERROR | E_WARNING | E_PARSE); $server = 'ftp.someserver.com'; $ftpConn = ftp_connect($server); if(!$ftpConn) echo 'failed'; else echo 'success'; No errors are reported.

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  • Ant var and property scope

    - by bobtheowl2
    I have a main build script that calls various targets. One of these targets needs to store a value and another target needs to display it. Obviously this is not working so I think it may be related to scope. I've tried var, property, and declaring the property outside of target1. Since var seems to be mutable, it looks like I need to use it instead, but each time my output is empty. Main script <antcall target="target1"/> <antcall target="display"/> In target1: <var name="myVar" value="${anotherVar}"/> In display: <echo>${myVar}</echo>

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  • JQuery with SMARTY php

    - by out_sider
    This might seem a very noob question but I haven't found the answer yet. I have a header.tpl file which contains xhtml code. I want to and some java script to it using jquery. But my problem is that it simple doesn't happen what I tell it to do. Because the page hoster comiples php with SMARTY I had to make a small change to the block script, which was had the {literal} {/literal}. But the rest seems ok. Btw the jquery.js is on the same folder as the header.tpl. File header.tpl http://feupload.fe.up.pt/get/SQWJvybQkDCmjEG PS: I event replaced all the code by the getstarted tutorial on the jquery homepage and added the {literlar} {/literal} (otherwise it would give an error) and it steel didn't work

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  • Posting to tumblr in PHP

    - by Sherif
    I am trying to make a test post to my tumblr blog with a php script (that will eventually be ran as a cron job) I have been browsing google and read many answers on here and the closest I found is explained in this post: Tumblr OAuth using PHP's OAuth class I am using the code in his tutorial here: http://vigrond.com/blog/2012/02/04/oauth-extension-php-and-the-tumblr-api/ Pretty much as is, replacing the blogurl with mine and of course the consumer and secret key. When I run the .php script via my browser however, nothing happens. Any ideas? EDIT: The only error I found in cPanel's error log is this: [Wed Oct 31 00:29:25 2012] [error] [client xx.xx.xx.xx ] PHP Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /path on line 14 But I fixed this and the error does not appear anymore.

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  • XML jQuery Problem

    - by Llamabomber
    This code for parsing my xml and appending via jquery seems to work great in every browser but Chrome (Mac only, the windows version of chrome works fine) and explorer. I'm not aware of any glaring issues in the code so I thought some fresh eyes might help. Anyone know what could be causing IE and Chrome on the mac to not append? <script type="text/javascript" charset="utf-8"> $(document).ready(function() { $.ajax({ type: "GET", url: "sitenav.xml", dataType: "xml", success: parseXml }); function parseXml(xml) { $(xml).find("GoogleAnalytics").each(function() { $("li#google_analytics").append('<ul><li>' + $(this).find("NavHeader").text() + '</li></ul>'); }); } }); </script>

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  • Click events not working in Rails view

    - by Fdr
    I have following view (html.erb): <h3>My view</h3> <script> function test() { alert("hello"); } </script> <input type="button" onClick="test();" value="test" /> For reasons I cannot understand the onClick event never gets fired when I access the view through rails(tried static apache hosting - no problems there). Here is rendered html: http://pastebin.com/LmGysgUG I feel quite stupid, is this something to do the way Rails renders views?

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  • How to suppress error messages in rpy2

    - by Björn
    Hello! The following code does not work. It seems that the R warning message raises a python error. # enable use of python objects in rpy2 import rpy2.robjects.numpy2ri import numpy as np from rpy2.robjects import r # create an example array a = np.array([[5,2,5],[3,7,8]]) # this line leads to a warning message, which in turn raises an # error message if run within a script. result = r['chisq.test'](a) Running that code example in ipython works, however, running it inside a script raises the errorTypeError: 'module' object is unsubscriptable. I assume this is due to the warning message. What is the best way to avoid this problem? Thanks in advance!

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  • How to enable fcbkcomplete in dialog Jquery

    - by bengbung
    Hi all, I use autocomplete plugin: http://www.emposha.com/javascript/fcbkcomplete.html its work fine in page, but search result not showing when i place in dialog box (iam use Jquery UI). Please somebody help me... i have change z-index in style.css but this problem not gone. <select id="select1" name="select1"> <option value="test1">test1</option> <option value="test3">test2</option> <option value="test4">test3</option> </select> <script type="text/javascript"> $(function() { $("#select1").fcbkcomplete(); }); </script>

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  • Error on SQL insert statement

    - by Ashley Stewart
    I exported a recordset from one database into a csv file, and when I try to import it into another using mysql workbench I keep this this error message: Executing SQL script in server ERROR: Error 1064: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ' 'Lord it Over', 'Ben', '1993-03-01', 'TRC', NULL, 1983, '1999-09-01', 'NULL', '' at line 1 INSERT INTO `TRC`.`horse` (`horse_id`, `registered_name`, `stable_name`, `arrival_date`, `last_known_location`, `is_ex_racer`, `birth_year`, `death_date`, `horse_comments`, `sex`, `referral_date`, `horse_height`, `arrival_weight`, `passport_no`, `microchip_no`, `is_on_waiting_list`) VALUES (, 'Lord it Over', 'Ben', '1993-03-01', 'TRC', NULL, 1983, '1999-09-01', 'NULL', 'NULL', 'NULL', NULL, NULL, 'NULL', 'NULL', 0) SQL script execution finished: statements: 29 succeeded, 1 failed Fetching back view definitions in final form. Nothing to fetch Any help would be appreciated as their appears to be no errors as far as I can see.

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  • Need to read .symtab

    - by user361190
    I am frustrated. I have a simple doubt .. I compile a simple program with gcc and if I see the section header using objdump, it does not show the section ".symtab". for the same a.out file, readelf shows the section. see the below snip - [25] .symtab SYMTAB 00000000 000ca4 000480 10 26 2c 4 [26] .strtab STRTAB 00000000 001124 00025c 00 0 0 1 Why ? In the default linker script I don't find a definition for .symtab section. If I add a definition by myself like in the linker script : .... PROVIDE(__start_sym) .symtab : { *(.symtab)} PROVIDE(__end_sym) .... the difference b/w the addresses of __start_sym and __end_sym is zero, which means no such section is added in the output file. But the readelf is able to read the section and dump the contents of this section .. How ? why ?

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  • How to color HTML elements based on parsing a user command string

    - by Anonymous the Great
    I'm working on a little parsing thing to color objects. For an example, you could type red:Hi!: and "Hi!" would be red. This is my not working code: <script type="text/javascript"> function post() { var preview = document.getElementById("preview"); var submit = document.getElementById("post"); var text = submit.value; <?php str_replace("red:*:",'<i class="red">*</i>',text); ?> preview.value = text; } </script>

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  • how to handle exceptions/errors in php?

    - by fayer
    when using 3rd part libraries they tend to throw exceptions to the browser and hence kill the script. eg. if im using doctrine and insert a duplicate record to the database it will throw an exception. i wonder, what is best practice for handling these exceptions. should i always do a try...catch? but doesn't that mean that i will have try...catch all over the script and for every single function/class i use? Or is it just for debugging? i don't quite get the picture. Cause if a record already exists in a database, i want to tell the user "Record already exists". And if i code a library or a function, should i always use "throw new Expcetion($message, $code)" when i want to create an error? Please shed a light on how one should create/handle exceptions/errors. Thanks

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  • Why Doesn't This Java Code Skip Lines with #?

    - by Nathan
    I'm trying to allow an external .txt file that is read by a Java script be able to have some comments in the beginning of the file so others can easily edit it and add more to it. But if the file contains # (the sign designated for a line that is a comment) it just returns the error that there is a "Format Error in file" (the IOException - so it is getting past that first "IF"...) Can someone help? Here's the portion of the code that deals with commenting lines out of the .txt file being called earlier in the script: while ((line = br.readLine()) != null) { line = line.trim(); if (line.length() < 1 || line.charAt(0) == '#') { // ignore comments continue; } final String[] parts = line.split("="); if (parts.length != 2) { throw new IOException("Format error in file " + JLanguageTool.getDataBroker().getFromRulesDirAsUrl(getFileName()) + ", line: " + line); }

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  • Please help clarify my regex pattern

    - by Dmitriy Sosunov
    I have the following string: <script>m('02:29:1467301/>Sender1*>some text message?<<02:29:13625N1/>Sender2*>Recipient2: another message??<>A<<02:29:1393100=>User1*|0User2*|%></B><<','');</script> N.B. messages are separated by << I need extract from message the following parts: 1. Time 2. Sender 3. Recipient 4. Text Recipient may being defined or not, this field is optional. I do this by the following pattern: (?<message>(?<time>\d{1,2}:\d{1,2}:[0-9a-z]+)/>(?<messageData>(?<sender>.+?)\*>(.+?)))<< But, I cannot extract recipient separately from the message text. (?<message>(?<time>\d{1,2}:\d{1,2}:[0-9a-z]+)/>(?<messageData>(?<sender>.+?)\*>(((?<recipient>.+?):){0,1}(?<messageText>.+?))))<< Please help correct my pattern.

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  • Getting the errors for code in unopened .aspx pages

    - by Glennular
    Is there a way to check for errors in unopened *.ASPX pages. For example, if you change the name of a function Visual Studio will catch the error on the page and list it in the "Error List" only if the page is opened and being validated? I guess the question could be is there a validation option opposed to the compile option to check for errors? (Yes, i know code should go into the pre-compiled code-behind pages.) How do i find out about the following without running the page through the webserver or opening the page to be validated in VS? <script runat="server"> Public Sub MyFunciton() Undefined_FUNCTION() End Sub </script>

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  • How can I show the "Upload" tab in CKEditor?

    - by Hermet
    Hi guys, I've checked the CKEditor developer documentation and also some solved questions in here about this editor but couldn't find one which helped me. The thing is, I have set up CKEditor and when I get into the images dialog I can't see any "Upload" tab. I am trying to set up a custom file uploader, and according to the documentation is something like this: <script type="text/javascript"> CKEDITOR.replace( 'cuerpo', { filebrowserBrowseUrl : '/imgs/explorador.php', filebrowserUploadUrl : '/imgs/subirImagenes.php' }); </script> Thank you, and apologies for my English.

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