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  • What's faster to parse lots of data (5Mb): eval or json?

    - by AlfaTeK
    I want to get, via ajax, a collection of data objects and parse them into JS data. Currently I have 2 choices: - Server returns valid javascript code and then I eval it. - Server returns JSON object and then I eval the json object What is the fastest of these in Firefox? (I only care about the "parsing" performance, not server or data transfer)

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  • Prerequistes for learning how to code a facebook application

    - by Peter
    I am facing a really tough time doing this. I haven't done much on web development before this. I know HTML and dats it. What else do I need to learn in order to start coding a good facebook app (specifically scripting languages like JS, PHP etc). I have already created a test application using a web hosting site. Time is of the essence here.

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  • Javascript self contained sandbox events and client side stack

    - by amnon
    I'm in the process of moving a JSF heavy web application to a REST and mainly JS module application . I've watched "scalable javascript application architecture" by Nicholas Zakas on yui theater (excellent video) and implemented much of the talk with good success but i have some questions : I found the lecture a little confusing in regards to the relationship between modules and sandboxes , on one had to my understanding modules should not be effected by something happening outside of their sandbox and this is why they publish events via the sandbox (and not via the core as they do access the core for hiding base libary) but each module in the application gets a new sandbox ? , shouldn't the sandbox limit events to the modoules using it ? or should events be published cross page ? e.g. : if i have two editable tables but i want to contain each one in a different sandbox and it's events effect only the modules inside that sandbox something like messabe box per table which is a different module/widget how can i do that with sandbox per module , ofcourse i can prefix the events with the moduleid but that creates coupling that i want to avoid ... and i don't want to package modules toghter as one module per combination as i already have 6-7 modules ? while i can hide the base library for small things like id selector etc.. i would still like to use the base library for module dependencies and resource loading and use something like yui loader or dojo.require so in fact i'm hiding the base library but the modules themself are defined and loaded by the base library ... seems a little strange to me libraries don't return simple js objects but usualy wrap them e.g. : u can do something like $$('.classname').each(.. which cleans the code alot , it makes no sense to wrap the base and then in the module create a dependency for the base library by executing .each but not using those features makes a lot of code written which can be left out ... and implemnting that functionality is very bug prone does anyonen have any experience with building a front side stack of this order ? how easy is it to change a base library and/or have modules from different libraries , using yui datatable but doing form validation with dojo ... ? some what of a combination of 2+4 if u choose to do something like i said and load dojo form validation widgets for inputs via yui loader would that mean dojocore is a module and the form module is dependant on it ? Thanks .

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  • SSL with external static content server

    - by SirMoreno
    I have a .Net web application that for performance issues gets all the static data (CSS, Images, JS) from an external server that is on different location and different hosting company. I want to enable SSL on my site without the users getting a message: "Page contains both secure and insecure elements" Does this means I’ll have to get two SSL Certificates one for each server? If I want the users to continue getting the static content from the external server what other options do I have? Thanks.

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  • jQuery to hide and show divs with an indicator

    - by songdogtech
    Using the jQuery below to toggle the hiding and showing of divs of text: how would I add some sort of indicator - like an up and down arrow as a graphic - to the titles when the divs are either open and closed? What's the best way to do that? Two images? A CSS sprite? And most importantly: how would that be integrated into the JS? I've looked at other jQuery that assigns a random number to each div and then determines which are open and which are closed and toggles one of two images. But I'm using php in a WordPress loop to show a posts, and that gives problems with incrementing in the loop, so there must be an easier way that doesn't require changes in the name of the title div. Thanks.... This JS fires the showing and hiding. Each div can be expanded and collapsed independently. $(document).ready(function() { $('div.demo-show:eq(0)> div').hide(); $('div.demo-show:eq(0)> h3').click(function() { $(this).next().slideToggle('fast'); }); }); This is the HTML it works with: <div class="collapser"> <p class="title">Header-1 </p> <div class="contents">Lorem ipsum</div> <p class="title">Header-2</p> <div class="contents">Lorem ipsum </div> <p class="title">Header-3</p> <div class="contents">Lorem ipsum</div> </div> The CSS is arbitrary: .collapser { margin: 0; padding: 0; width: 500px; } .title { margin: 1px; color: #fff; padding: 3px 10px; cursor: pointer; position: relative; background-color:#c30; } .contents { padding: 5px 10px; background-color:#fafafa; }

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  • Unzipping zip archives with JavaScript in Firefox 3.6

    - by August Lilleaas
    I am toying with an application that will demo some Firefox 3.6 specific functionality, most of which are listed here: http://demos.hacks.mozilla.org/openweb/ I want to drag a zip file in the browser, unzip it, and work with the unzipped contents. Are there any existing libraries that can do this? Does FireFox 3.6 in particular have something I can use? Or would I have to roll my own unzipper library? For the record: http://github.com/augustl/js-unzip

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  • Need Google Map InfoWindow Hyperlink to Open Content in Overlay (Fusion Table Usage)

    - by McKev
    I have the following code established to render the map in my site. When the map is clicked, the info window pops up with a bunch of content including a hyperlink to open up a website with a form in it. I would like to utilize a function like fancybox to open up this link "form" in an overlay. I have read that fancybox doesn't support calling the function from within an iframe, and was wondering if there was a way to pass the link data to the DOM and trigger the fancybox (or another overlay option) in another way? Maybe a callback trick - any tips would be much appreciated! <style> #map-canvas { width:850px; height:600px; } </style> <script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=true"></script> <script src="http://gmaps-utility-gis.googlecode.com/svn/trunk/fusiontips/src/fusiontips.js" type="text/javascript"></script> <script type="text/javascript"> var map; var tableid = "1nDFsxuYxr54viD_fuH7fGm1QRZRdcxFKbSwwRjk"; var layer; var initialLocation; var browserSupportFlag = new Boolean(); var uscenter = new google.maps.LatLng(37.6970, -91.8096); function initialize() { map = new google.maps.Map(document.getElementById('map-canvas'), { zoom: 4, mapTypeId: google.maps.MapTypeId.ROADMAP }); layer = new google.maps.FusionTablesLayer({ query: { select: "'Geometry'", from: tableid }, map: map }); //http://gmaps-utility-gis.googlecode.com/svn/trunk/fusiontips/docs/reference.html layer.enableMapTips({ select: "'Contact Name','Contact Title','Contact Location','Contact Phone'", from: tableid, geometryColumn: 'Geometry', suppressMapTips: false, delay: 500, tolerance: 8 }); ; // Try W3C Geolocation (Preferred) if(navigator.geolocation) { browserSupportFlag = true; navigator.geolocation.getCurrentPosition(function(position) { initialLocation = new google.maps.LatLng(position.coords.latitude,position.coords.longitude); map.setCenter(initialLocation); //Custom Marker var pinColor = "A83C0A"; var pinImage = new google.maps.MarkerImage("http://chart.apis.google.com/chart?chst=d_map_pin_letter&chld=%E2%80%A2|" + pinColor, new google.maps.Size(21, 34), new google.maps.Point(0,0), new google.maps.Point(10, 34)); var pinShadow = new google.maps.MarkerImage("http://chart.apis.google.com/chart?chst=d_map_pin_shadow", new google.maps.Size(40, 37), new google.maps.Point(0, 0), new google.maps.Point(12, 35)); new google.maps.Marker({ position: initialLocation, map: map, icon: pinImage, shadow: pinShadow }); }, function() { handleNoGeolocation(browserSupportFlag); }); } // Browser doesn't support Geolocation else { browserSupportFlag = false; handleNoGeolocation(browserSupportFlag); } function handleNoGeolocation(errorFlag) { if (errorFlag == true) { //Geolocation service failed initialLocation = uscenter; } else { //Browser doesn't support geolocation initialLocation = uscenter; } map.setCenter(initialLocation); } } google.maps.event.addDomListener(window, 'load', initialize); </script>

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  • how to use window.onload?

    - by Patrick
    I'm refactoring a website using MVC. What was a set of huge pages with javascript, php, html etc etc is becoming a series of controllers and views. I'm trying to do it in a modular way so views are split in 'modules' that I can reuse in other pages when needed eg. "view/searchform displays only one div with the searchform "view/display_events displays a list of events and so on. One of the old pages was supposed to load a google map with a marker on it. Amongst the rest of the code, I can identify the relevant bits as follows <head> <script src="http://maps.google.com/maps?file=api&amp;v=2&amp;key=blablabla" type="text/javascript"></script> <script type="text/javascript"> //<![CDATA[ function load() { if (GBrowserIsCompatible()) { var map = new GMap2(document.getElementById("map")); var point = new GLatLng(<?php echo ($info->lat && $info->lng) ? $info->lat .",". $info->lng : "51.502759,-0.126171"; ?>); map.setCenter(new GLatLng(<?php echo ($info->lat && $info->lng) ? $info->lat .",". $info->lng : "51.502759,-0.126171"; ?>), 15); map.addControl(new GLargeMapControl()); map.addControl(new GScaleControl()); map.addOverlay(new GMarker(point)); var marker = createMarker(point,GIcon(),"CIAO"); map.addOverlay(marker); } } //]]> </script> </head> ...then <body onload="load()" onunload="GUnload()"> ...and finally this div where the map should be displayed <div id="map" style="width: 440px; height: 300px"> </div> Don't know much about js, but my understanding is that a) I have to include the scripts in the view module I'm writing (directly in the HTML? I would prefer to load a separate script) b) I have to trigger that function using the equivalent of body onload... (obviously there's no body tag in my view. In my ignorance I've tried div onload=.... but didn't seem to be working :) What do you suggest I do? I've read about window.onload but don't know what's the correct syntax for that. please keep in mind that other parts of the page include other js functions (eg, google adsense) that are called after the footer.

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  • how can a firefox extension detect content-type of the page loaded ?

    - by bosky101
    since my extension's pageload is triggered even when I view css or js files, i want to add another check that triggers my extension only when the current page's content-type is text/html . //eg: at my page load handler function onPageload(){ // only want to proceed if content-type reflects a text/html or */html page if ( contentTypeIsHtml() ){ //continue here } } what should contentTypeIsHtml() do ?

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  • rails javascript_include_tag

    - by ash34
    Hi, I have a few custom .js files in my public/javascripts folder. The 'javascript_include_tag' adds script tags to the head element. Are these executed in the order in which they appear. If yes, how do I control the order in which these script tags are added to my html. thanks, ash

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  • how to set a polyline on google maps every time when i click twice(make two markers) on maps,

    - by zjm1126
    this is my code : thanks <!DOCTYPE html PUBLIC "-//WAPFORUM//DTD XHTML Mobile 1.0//EN" "http://www.wapforum.org/DTD/xhtml-mobile10.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <meta name="viewport" content="width=device-width,minimum-scale=1.0,maximum-scale=5.0,user-scalable=yes"> </head> <body onload="initialize()" onunload="GUnload()"> <style type="text/css"> </style> <div id="map_canvas" style="width: 500px; height: 300px;float:left;"></div> <script src="jquery-1.4.2.js" type="text/javascript"></script> <script src="jquery-ui-1.8rc3.custom.min.js" type="text/javascript"></script> <script src="http://maps.google.com/maps?file=api&amp;v=2&amp;key=ABQIAAAA-7cuV3vqp7w6zUNiN_F4uBRi_j0U6kJrkFvY4-OX2XYmEAa76BSNz0ifabgugotzJgrxyodPDmheRA&sensor=false"type="text/javascript"></script> <script type="text/javascript"> //********** function initialize() { if (GBrowserIsCompatible()){ //var map = new GMap2(document.getElementById("map_canvas")); //map.setCenter(new GLatLng(39.9493, 116.3975), 13); var map = new GMap2(document.getElementById("map_canvas")); var center=new GLatLng(39.917,116.397); map.setCenter(center, 13); map.addOverlay(new GMarker(new GLatLng(39.917,116.397))); map.enableDrawing() //GEvent.addListener(map, "mouseover", function() { //alert("???????"); //}); var one; aFn=function(y_scale,x_scale){ //************ //function p(){ var bounds = map.getBounds(); var southWest = bounds.getSouthWest(); var northEast = bounds.getNorthEast(); var lngSpan = northEast.lng() - southWest.lng(); var latSpan = northEast.lat() - southWest.lat(); var point = new GLatLng(southWest.lat() + latSpan * (1-y_scale), southWest.lng() + lngSpan * x_scale); if(!one){ map.addOverlay(new GMarker(point)); one=point; }else{ var polyline = new GPolyline([one,point], "#ff0000", 5); map.addOverlay(polyline); one=0; } } //********** //************* } } </script> </body> </html>

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  • Which JavaScript graphics library has the best performance?

    - by DNS
    I'm doing some research for a JavaScript project where the performance of drawing simple primitives (i.e. lines) is by far the top priority. The answers to this question provide a great list of JS graphics libraries. While I realize that the choice of browser has a greater impact than the library, I'd like to know whether there are any differences between them, before choosing one. Has anyone done a performance comparison between any of these?

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  • Project Performance Evaluation and Finding Weak Areas

    - by pramodc84
    I'm working in J2EE web project, which has lots of Java, SQL scripts, JS, AJAX stuff. Its been 5 years for project still running fine. I have assigned with work of performance evaluation on the project as there might be some memory usage issues, DB fetching logic delays and other similar weak performance areas. From where should I begin? Any best practices to make project better?

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  • Download and Archive Web Pages on the iPhone

    - by Stefan
    Hi, how do I download and archive full web pages (HTML, CSS, JS, images) on the iPhone? I know how to download the single files. But is there any existing approach to get all files (e.g. all included javascripts), which are linked with a particular web page?

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  • Graceful Degradation with JSON.Parse

    - by Steve
    If a browser doesn't support JSON.parse, would it make sense to include json.js and call parseJSON in lieu? So the code would looks something like: var z; if (JSON.parse) z = JSON.parse(yada); else z = JSON.parseJSON(yada);

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