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• Getting-started: Setup Database for Node.js

  - by Emile Petrone

  I am new to node.js but am excited to try it out. I am using Express as a web framework, and Jade as a template engine. Both were easy to get setup following this tutorial from Node Camp. However the one problem I am finding is I can't find a simple tutorial for getting a DB set up. I am trying to build a basic chat application (store session and message). Does anyone know of a good tutorial? This other SO post talks about dbs to use- but as this is very different from the Django/MySQL world I've been in, I want to make sure I understand what is going on. Thanks!

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• DOM Elements with same id and jQuery

  - by Steve

  Hi I have multiple elements with the same structure in my application. Second div element's id varies as per the comment id in the db which is unique. There are elements with the id 'vote_up' and 'vote_down'. This gets repeated for each comment.What happens is that, as I mentioned, there are multiple comments. I want to perform an Ajax request. First of this structure functions properly using ajax, but the rest does an http request. Btw I am developing a rails application and I am using jQuery. <div id="post_comment"> john<i> says </i> Comment<br/> <div id="comment_10_div"> **<form action="/comments/vote_up" id="vote_up" method="post">** <div style="margin:0;padding:0;display:inline"> <input name="authenticity_token" type="hidden" value="w873BgYHLxQmadUalzMRUC+1ql4AtP3U7f78dT8x9ho=" /> </div> <input id="Comment_place_id" name="Comment[post_id]" type="hidden" value="3" /> <input id="Comment_id" name="Comment[id]" type="hidden" value="10" /> <input id="Comment_user_id" name="Comment[user_id]" type="hidden" value="2" /> <input name="commit" type="submit" value="Vote up" /> </form> <label id="comment_10">10</label> **<form action="/comments/vote_down" id="vote_down" method="post">** <div style="margin:0;padding:0;display:inline"> <input name="authenticity_token" type="hidden" value="w873BgYHLxQmadUalzMRUC+1ql4AtP3U7f78dT8x9ho=" /> </div> <input id="Comment_place_id" name="Comment[place_id]" type="hidden" value="3" /> <input id="Comment_id" name="Comment[id]" type="hidden" value="10" /> <input id="Comment_user_id" name="Comment[user_id]" type="hidden" value="2" /> <input name="commit" type="submit" value="Vote Down" /> </form> </div> Can you please help me to solve this Thanks

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• Adding js to a drupal node form

  - by googletorp

  In Drupal you can create your own nodetype in a custom module. Doing this you get to create your own form which is all very nice. However if you want to add js the form things get a bit more tricky. If you add the js in the form, the js will only be added form the form when it is loaded. If the user would post the form with validation errors, the form function is not run again and thus the js is not added. Normally you would just create a menu callback and add the js there, but for the node add form, this wont be a possible solution. So what is the best solution for adding js in a node add form, to keep it persistant when the form doesn't validate?

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• submit remote form with prototype

  - by badnaam

  I have a remote form like this and a checkbox in it. When I select or deselect the checkbox I would like to 1 - set the value of a hidden field 2 - ajax submit this form to its designated url. I tried $('search_form').onsubmit(), but I get an error saying onsubmit is not a function. Using prototype. Whats the best way to do this? <form onsubmit="new Ajax.Request('/searches/search_set?stype=1', {asynchronous:true, evalScripts:true, parameters:Form.serialize(this)}); return false;" method="post" id="new_search" class="new_search" action="/searches/search_set?stype=1"><div style="margin: 0pt; padding: 0pt; display: inline;"><input type="hidden" value="3TWSyMsZXI0nltz7zHAxuj1KX=" name="authenticity_token"></div> <a onclick="setSubmit(this);" href="#" class="submit-link-button fg-button ui-state-default fg-button-icon-left ui-corner-all" id="search_submit"><span class="ui-icon ui-icon-search"></span>'Search'</a> </div> <input type="checkbox" value="Energy" onclick="refreshResults(this);" name="search[conditions][article_tag][0]" id="search_conditions_article_tag_0">

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• Quicker searching in JScript using the Bash

  - by gentlesea

  I am using the following JScript code to search for a string inside a file: var myFile = aqFile.OpenTextFile(fileToSearchIn, aqFile.faRead, aqFile.ctANSI); while(!myFile.IsEndOfFile()) { s = myFile.ReadLine(); if (aqString.Find(s, searchString) != -1) Log.Checkpoint(searchString + " found.", s); } myFile.Close(); This is rather slow. I was thinking about using bash commands in order to speed up the search in file process: var WshShell = new ActiveXObject("WScript.Shell"); var oExec = WshShell.Exec("C:\\cygwin\\bin\\bash.exe -c 'cat \"" + folderName + "/" + fileName + "\"'"); while (!oExec.StdOut.AtEndOfStream) Log.Checkpoint(oExec.StdOut.ReadLine()); while (!oExec.StdErr.AtEndOfStream) Log.Error(oExec.StdErr.ReadLine()); Since every time bash.exe is started a new window opens the searching is not faster than before. Is there a possibility to have the bash run in the background using another switch?

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• D3.js transition callback on frame

  - by brenjt

  Does anyone know how I could accomplish a per frame callback for a transition with D3. Here is and example of what I am doing currently. link.transition() .duration(duration) .attr("d", diagonal) .each("end",function(e) { if(e.target.id == current) show_tooltip(e.target) }); This currently calls the anonymous function for each element at the end of the animation. I would like to call it for every frame.

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• jQuery - Animation Causes Div Overlap IE7

  - by Norbert

  I have a hidden div (#contactArea) above another div. When I click the link, the #contactArea opens up. When I click it again, it closes back up. It all works nicely, except in IE7. The two divs are transparent, so they overlap. I have no idea why this happens, or why doesn't it happen on other browsers. It just about feels like IE7 is right on this one. Any way to fix this? $(document).ready(function(){ $("#contactArea").css('display', 'none'); $("a.contact").toggle(function() { $("#contactArea").animate({height: "show"}, 1500, "easeOutBounce"); }, function() { $("#contactArea").animate({height: "hide"}, 1500, "easeOutBounce"); }); });

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• Apache tiles and body onload event. Known issue?

  - by Angus

  We're prototyping a new visual framework using Apache Tiles for markup templating. Often the document onload event (actually prototype's dom:loaded event) is getting fired before all DOM objects are actually loaded Is it possible that the tiles templates are loading in an asynchronous fashion and therefore doing an end run around the event handler? Has anyone else had this experience? Can anyone share a robust workaround? thanks in advance

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• Show alert on browser close but don't show alert while closing from logoff

  - by Neha Jain

  In my application when user logs out the browser is closed. And on browser close I am throwing an alert. Now what I want is if I directly close the browser window alert should come but if window is closed through logout alert should not come as I have shown another confirm message of logout. function closeEditorWarning(){ for (var i=0;i<childWindow.length;i++) { if (childWindow[i] && !childWindow[i].closed) childWindow[i].close(); if(i==0) { alert("This will close all open e-App applications"); } } window.close(); } window.onbeforeunload = closeEditorWarning; And this is my logout code $('#'+id).click(function(event){ event.preventDefault(); $('#centerContent').load('<%=request.getContextPath()%>/'+target); }); } else { $('#'+id).click(function(event){ event.preventDefault(); var r=confirm("logout"); if (r==true) { flag=true; for (var i=0;i<childWindow.length;i++) { if (childWindow[i] && !childWindow[i].closed) childWindow[i].close(); } window.close(); } else { } }); }

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• On IE cursor is comming always at start in textarea

  - by pravin

  I am dealing with textarea, and on click of this I am calling one replace function which will remove some specified string in textarea, this is the basic operation. Expected behavior after clicking on textarea 1) At first click : It should remove specified string from textarea Cursor should come at end of string 2) more than one click : - Cursor should come at where ever user clicks in text area Below is my replace function.... function replace(id,transFromDb) { newStr = $("#"+id).val(); var len = null; if(transFromDb == '') { newStr = newStr.replace(Lang.Message27,''); newStr = newStr.replace(Lang.Message28,''); } else { newStr = newStr.replace(Lang.Message28,''); newStr = newStr.replace(Lang.Message27,''); } /* change font weight as bold. */ $("#"+id).css({"fontWeight":"bold"}); $("#"+id).val(newStr); } Assume that Lang.Message is specified string. It's working above behavior with FF. Facing issue on IE, it always keep cursor position at first. Please provide any solution.... Thanks in Adavance Pravin

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• How can I call a function at the very end of document.ready

  - by Umair

  I have multiple document.ready functions on a page and I want a function to be called when all my document.ready functions have been executed. I simply want the function to be called at the very end, after all other document.ready functions have executed. An example of this could be that each document.ready function increments a global variable when it has been executed, and the last function needs to check the value of that variable at the very end. Any ideas ?

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• Set focus to textbox after alert in Safari

  - by Slava

  I'm trying to return focus to the textbox after showing message. Like the following code: <input type="text" id="text1" /> <input type="submit" id="submit1" onclick="alert('test');document.getElementById('text1').focus();return false;" /> It's not working in Safari. I've got version 4.0.5 for Windows.

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• In XMLHttpRequest, where is error flag variable?

  - by Tiangolo

  In the XMLHttpRequest Spec it says that: The DONE state has an associated error flag that indicates some type of network error or abortion. It can be either true or false and has an initial value of false. Also says something similar about a "send() flag" in an "OPENED" state. It's said in the specification but not in the IDL and when I create a new XMLHttpRequest I can't find those "flags". Where are those boolean variables?

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• Syntax highlighting with Chili

  - by Nimbuz

  I want to use jquery Chili plugin for syntax highlighting a piece of code thats generated on the fly, but its not working for the same, because the code is inserted into the #output div on page load. When I tried chili with static examples, it worked but not on the dynamically generated code. Is there any workaround? Thanks in advance for your help!

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• Reset Java Applet on page reload

  - by tommy-susanto

  I need to quit firefox and restart it in order for the applet to be refreshed... its anoying since i'm still programming it an the class files changes... am i missing some codes which makes it unable to refresh the applet and still take the one from the cache??? So I have a .jar applet in my website, a simulation game that spawns army whenever user clicks on the screen... however whenever I refresh the page, the previous army are still there on the screen.. I want it to be refreshed (as if we're just starting to run the application the first time). I already tried pressing CTRL+f5 but the trick doesn't seem to work I'd basically like to do it automatically using scripts or something, so that it won't require user to manually press some button on the keyboard Any Suggestions? I'd really appreciate it Thank you....

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• Menu glitchy on top of slideshow

  - by gnomixa

  I have implemented the following set up (after being requested): slideshow of images changing, after the user mouse over, the menu would appear in the top right corner, it would disappear on mouse out. The problem is that the menu it glitchy in both IE6/7 and FF 3.5. I have tried Jquery hover, mouseenter, mouseleave, all with the same result. http://www.codecookery.com/test/index.html is it possible to make it not glitchy at all?

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• How to select font with its style attribute value.

  - by Wazdesign

  I have the following html mark up. <p> lorem ipsum lorem ipsum <font style="background-color:yellow"> ipsum </font> Lorem ipsum dolor sit amet, consectetur adipiscing elit. Etiam id enim in tellus sollicitudin viverra. Morbi nec ipsum ligula, non volutpat enim. In quis metus <font style="color:red"> Tincidunt lorem </font>blandit faucibus. Nam condimentum facilisis vestibulum. Nunc tristique est vel erat sagittis ac placerat orci varius.</p> I want to select only the font which has the "background-color:yellow" not any other <font> tag with any style

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• ajax request rely on the previous one

  - by Lynn

  I want to do something like this: $.ajax({ url: SOMEWHERE, ... success: function(data){ // do sth... var new_url = data.url; $.ajax({ url: new_url, success: function(data){ var another_url = data.url; // ajax call rely on the result of previous one $.ajax({ // do sth }) } }) }, fail: function(){ // do sth... // ajax call too $.ajax({ // config }) } }) the code looks like shit. I wonder how to make it looks pretty. Some best practice?

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• ASCIIMath and TiddlyWiki

  - by Space_C0wb0y

  I use TiddlyWiki for work-notes. I already have pretty large wiki, but now I want to add math-support. As far as I understand what is written here, all I would have to do to use ASCIIMathML in my wiki would be including the script ASCIIMathML.js. Doesn't work (no effect at all). Then I found this plugin for TiddlyWiki, but when I import it to my wiki, it gives me an error in one of the regexp strings. When I download that wiki directly, ASCIIMath does not work anymore, even though I have the script in the same directory. Does anyone have a solution available, how I can add ASCIIMath to my existing TiddlyWiki?

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• Regular expression to match Amsterdam postcodes

  - by rajanikant

  can any one tell me regular expression for postalcode of Amsterdam, Netherlands for validation EX. 1113 GJ Postal code format according to Wikipedia (thanks to Pekka): 1011–1199 plus a literal suffix AA-ZZ, e.g. 1012 PP

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• How to not allow parts of sortable jquery list to move?

  - by sanpell

  I made a sortable list: <ul> <li class="line"><a href="#" class="food">milk</a></li> <li class="line"><a href="#" class="food">eggs</a></li> <li class="line"><a href="#" class="food">cheese</a></li> </ul> However, I want to make everything with class food not draggable. Since they are links, sometimes when people click them, they accidently reorder the list. Does anyone know how to make just the "food" class items not "draggable"?

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• window.beforeunload called twice in Firefox - how to get around this?

  - by Zarkonnen

  I'm creating a popup window that has a beforeunload handler installed. When the "Close" file menu item is used to close the popup, the beforeunload handler is called twice, resulting in two "Are you sure you want to close this window?" messages appearing. This is a bug with Firefox, and I've reported it here, but I still would like a way to prevent this from happening. Can you think of a sane way of detecting double beforeunload to prevent the double message problem? The problem is that Firefox doesn't tell me which button in the dialog the user elected to click - OK or cancel.

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• Django-ckeditor inline error

  - by ad3w

  I'm using FeinCMS (https://github.com/feincms/feincms/) and django-ckeditor with file upload support (https://github.com/shaunsephton/django-ckeditor). I create a FeinCMS content type for RichTextField: class RichContent(models.Model): text = RichTextField(_('text')) class Meta: abstract = True verbose_name = _('Rich Text') verbose_name_plural =_('Rich Text') def render(self, **kwargs): context_instance = kwargs.get('context_instance') return render_to_string('content/page/rich_content.html', { 'page': self, }, context_instance=context_instance) But in Django admin, when i select 'Rich Text' and press 'Go', get this error in firebug console: uncaught exception: [CKEDITOR.editor] The instance "id_richcontent_set-__prefix__-text" already exists. And textarea in ckeditor do not editable.

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• When onblur occurs, how can I find out which element focus went *to*?

  - by Michiel Borkent

  Suppose I attach an onblur function to an html input box like this: <input id="myInput" onblur="function() { ... }"></input> Is there a way to get the ID of the element which caused the onblur event to fire (the element which was clicked) inside the function? How? For example, suppose I have a span like this: <span id="mySpan">Hello World</span> If I click the span right after the input element has focus, the input element will lose its focus. How does the function know that it was mySpan that was clicked? PS: If the onclick event of the span would occur before the onblur event of the input element my problem would be solved, because I could set some status value indicating a specific element had been clicked. PPS: The background of this problem is that I want to trigger an Ajax.AutoCompleter control externally (from a clickable element) to show its suggestions, without the suggestions disappearing immediately because of the onblur event on the input element. So I want to check in the OnBlur function if one specific element has been clicked, and if so, ignore the blur event.

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• How to get around the jslint error 'Don't make functions within a loop.'

  - by Ernelli

  I am working on making all of our JS code pass through jslint, sometimes with a lot of tweaking with the options to get legacy code pass for now on with the intention to fix it properly later. There is one thing that jslint complains about that I do not have a workround for. That is when using constructs like this, we get the error 'Don't make functions within a loop.' for (prop in newObject) { // Check if we're overwriting an existing function if (typeof newObject[prop] === "function" && typeof _super[prop] === "function" && fnTest.test(newObject[prop])) { prototype[prop] = (function (name, func) { return function () { var result, old_super; old_super = this._super; this._super = _super[name]; result = func.apply(this, arguments); this._super = old_super; return result; }; })(prop, newObject[prop]); } This loop is part of a JS implementation of classical inheritance where classes that extend existing classes retain the super property of the extended class when invoking a member of the extended class. Just to clarify, the implementation above is inspired by this blog post by John Resig. But we also have other instances of functions created within a loop. The only workaround so far is to exclude these JS files from jslint, but we would like to use jslint for code validation and syntax checking as part of our continuous integration and build workflow. Is there a better way to implement functionality like this or is there a way to tweak code like this through jslint?

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