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javascript Programming Glossary: anHow do JavaScript closures work? http://stackoverflow.com/questions/111102/how-do-javascript-closures-work closures work Like the old Albert Einstein said If you can't explain it to a six year old you really don't understand it.. can't explain it to a six year old you really don't understand it yourself. Well I tried to explain JavaScript closures to.. to explain JavaScript closures to a 27 year old friend and completely failed. How would you explain it to someone with..
Access / process (nested) objects, arrays or JSON http://stackoverflow.com/questions/11922383/access-process-nested-objects-arrays-or-json or JSON I have a nested data structure containing objects and arrays. How can I extract the information i.e. access a specific.. nested data structure containing objects and arrays. How can I extract the information i.e. access a specific or multiple.. there are only two actually one data types which can contain other data types objects and arrays a special form of..
Does it matter which equals operator (== vs ===) I use in JavaScript comparisons? http://stackoverflow.com/questions/359494/does-it-matter-which-equals-operator-vs-i-use-in-javascript-comparisons JSLint to go through some horrific JavaScript at work and it's returning a huge number of suggestions to replace two.. like comparing idSele_UNVEHtype.value.length 0 inside of an if statement. Is there a performance benefit to replacing with.. 0 inside of an if statement. Is there a performance benefit to replacing with Any performance improvement would..
http://stackoverflow.com/questions/5874652/prop-vs-attr i switch to 1.6 UPDATE See this fiddle http jsfiddle.net maniator JpUF2 The console logs the getAttribute as a string and.. JpUF2 The console logs the getAttribute as a string and the attr as a string but the prop as a CSSStyleDeclaration.. improve this question Update 1 November 2012 My original answer applies specifically to jQuery 1.6. My advice remains the..
Reference: Why does the PHP (or other server side) code in my Javascript not work? http://stackoverflow.com/questions/13840429/reference-why-does-the-php-or-other-server-side-code-in-my-javascript-not-wor which submits data to the server and loads a new page. An AJAX request which is a Javascript technique to make a regular..
Why does jQuery or a DOM method such as `getElementById` not find the element? http://stackoverflow.com/questions/14028959/why-does-jquery-or-a-dom-method-such-as-getelementbyid-not-find-the-element There are two reasons why an element might not exist An element with the passed ID really does not exist in the document... you are trying to select them before they actually exist . An added twist is when jQuery is not found because you have loaded..
Valid Characters for JavaScript Variable Names http://stackoverflow.com/questions/1661197/valid-characters-for-javascript-variable-names names my write up summarizing the relevant spec sections An identifier must start with _ or any character in the Unicode.. 5.1 and Unicode 6.1 P.S. To give you an idea of how wrong Anthony Mills' answer is if you were to summarize all these rules..
Change an element's CSS class with JavaScript http://stackoverflow.com/questions/195951/change-an-elements-css-class-with-javascript '' code wrapped for readability above is all one statement An explanation of this regex is as follows ^ s # match the start..
How do you determine equality for two JavaScript objects? http://stackoverflow.com/questions/201183/how-do-you-determine-equality-for-two-javascript-objects type to define how an Equals method should be implemented. An iterative comparision of attributes that have primitive values.. the distinction between data and method is blurred. An object may reference a method that is to be called as an event..
array.contains(obj) in JavaScript http://stackoverflow.com/questions/237104/array-containsobj-in-javascript the value. jQuery has several useful utility functions . An excellent JavaScript utility library is underscore.js _.contains..
http://stackoverflow.com/questions/242841/javascript-for-in-vs-for 'value1' So we can iterate for var i 0 i myArray.length i And for var i in myArray I don't see a big difference. Are there.. should be based on the which idiom is best understood. An array is iterated using for var i 0 i a.length i do stuff with.. iterated using for var i 0 i a.length i do stuff with a i An object being used as an associative array is iterated using..
How does this JavaScript/JQuery Syntax work: (function( window, undefined ) { })(window)? http://stackoverflow.com/questions/2716069/how-does-this-javascript-jquery-syntax-work-function-window-undefined article on JavaScript Namespacing and another one called An Important Pair of Parens so I know some about what's going on.. syntax before. What is that undefined doing there And why does window need to be passed and then appear at the end..
Is javascript guaranteed to be single-threaded? http://stackoverflow.com/questions/2734025/is-javascript-guaranteed-to-be-single-threaded threaded in despite you having done nothing to provoke it. An example textarea id log rows 20 cols 40 textarea button id act.. interaction with the browser because script is threaded. And for single windows you might be right. But that all goes to..
JavaScript unit test tools for TDD http://stackoverflow.com/questions/300855/javascript-unit-test-tools-for-tdd been updated for a few years Notes There is a JsUnit 2 . An 'ant' is an open source build tool Ant because it is a little.. is a JsUnit 2 . An 'ant' is an open source build tool Ant because it is a little thing that can build big things. RhinoUnit.. command line I guess it's mostly similar to JsTestDriver. Announcement from August 25th 2010 http www.yuiblog.com blog 2010..
How do I get the name of an object's type in JavaScript? http://stackoverflow.com/questions/332422/how-do-i-get-the-name-of-an-objects-type-in-javascript works well enough for most needs. That said... Caveats An example where it isn't as obvious is using multiple inheritance..
'console' is undefined error for Internet Explorer http://stackoverflow.com/questions/3326650/console-is-undefined-error-for-internet-explorer console log function script still I get the errors. Any way to get rid of the errors javascript internet explorer.. improve this question Try if window.console console ... An undefined variable cannot be referred directly. However all..
Does JavaScript Guarantee Object Property Order? http://stackoverflow.com/questions/5525795/does-javascript-guarantee-object-property-order an Object from ECMAScript Third Edition pdf 4.3.3 Object An object is a member of the type Object. It is an unordered collection..
http://stackoverflow.com/questions/5874652/prop-vs-attr .attr 'style' or in this case do they do the same thing And if I do have to switch to using prop all the old attr calls.. attr as a string but the prop as a CSSStyleDeclaration Why And how does that affect my coding in the future javascript jquery.. are generally simpler to deal with than attributes. An attribute value may only be a string whereas a property can..
YouTube iframe API: how do I control a iframe player that's already in the HTML? http://stackoverflow.com/questions/7443578/youtube-iframe-api-how-do-i-control-a-iframe-player-thats-already-in-the-html origin e.g. http stackoverflow.com . Q I get error message An invalid or illegal string was specified . Why A The API doesn't..
Building a Chrome Extension - Inject code in a page using a Content script http://stackoverflow.com/questions/9515704/building-a-chrome-extension-inject-code-in-a-page-using-a-content-script it's wise to create a function to avoid code repetition. An implementation might look like function injectScript func var..
Error when passing undefined variable to function? http://stackoverflow.com/questions/11874871/error-when-passing-undefined-variable-to-function any way to get this function isDefined to work THIS WORKS AND RETURN FALSE alert typeof sdfsdfsdfsdf 'undefined' THIS GIVES.. FALSE alert typeof sdfsdfsdfsdf 'undefined' THIS GIVES AN ERROR WHY Uncaught ReferenceError sdfsd is not defined function..
http://stackoverflow.com/questions/1283158/geolocation-api Asia AG North America AI North America AL Europe AM Asia AN North America AO Africa AQ Antarctica AR South America AS Australia..
Scroll smoothly to specific element on page http://stackoverflow.com/questions/17722497/scroll-smoothly-to-specific-element-on-page the Software. THE SOFTWARE IS PROVIDED AS IS WITHOUT WARRANTY OF ANY KIND EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO.. THE SOFTWARE IS PROVIDED AS IS WITHOUT WARRANTY OF ANY KIND EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO THE WARRANTIES.. EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND..
Flash based cropper like this, but with source or customizable? http://stackoverflow.com/questions/1974422/flash-based-cropper-like-this-but-with-source-or-customizable during my search Flex Image Cropping Component HOW TO CROP AND RESIZE AN IMAGE USED AS BACKGROUND FOR CANVAS Building an image.. Flex Image Cropping Component HOW TO CROP AND RESIZE AN IMAGE USED AS BACKGROUND FOR CANVAS Building an image viewing.. HOW TO CROP AND RESIZE AN IMAGE USED AS BACKGROUND FOR CANVAS Building an image viewing widget with ActionScript 3.0 The..
Javascript check Mouse clicked inside the Circle or Polygon http://stackoverflow.com/questions/2212604/javascript-check-mouse-clicked-inside-the-circle-or-polygon permission. THE SOFTWARE IS PROVIDED AS IS WITHOUT WARRANTY OF ANY KIND EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO.. THE SOFTWARE IS PROVIDED AS IS WITHOUT WARRANTY OF ANY KIND EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO THE WARRANTIES.. EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND..
Parse JSON String into a Particular Object Prototype in JavaScript http://stackoverflow.com/questions/5873624/parse-json-string-into-a-particular-object-prototype-in-javascript are commented in CAPITALS function Foo obj CONSTRUCTOR CAN BE OVERLOADED WITH AN OBJECT this.a 3 this.b 2 this.test function.. function Foo obj CONSTRUCTOR CAN BE OVERLOADED WITH AN OBJECT this.a 3 this.b 2 this.test function return this.a this.b.. 3 this.b 2 this.test function return this.a this.b IF AN OBJECT WAS PASSED THEN INITIALISE PROPERTIES FROM THAT OBJECT..
How to properly handle session and access token with Facebook PHP SDK 3.0? http://stackoverflow.com/questions/6468103/how-to-properly-handle-session-and-access-token-with-facebook-php-sdk-3-0 GET ACCESS TOKEN access_token facebook getAccessToken MAKE AN API CALL WITH IT user_info facebook api 'me fields id name first_name..
Returning HTML from JSON webservice - what is the “.d”? http://stackoverflow.com/questions/739859/returning-html-from-json-webservice-what-is-the-d #printdialoginner .html data.d I struggled with this FOR AN AGE before I noticed the .d in another example So it works but..
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