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  Learn from Haskell - Functional, Reusable JavaScript

Learn You a Haskell: For Great Good? For the last couple months I have been learning Haskell. Because there are so many unfamiliar concepts, it feels like learning to program all over again. At i.TV, we write a lot of JavaScript (node.js and front end). While many functional/haskell paradigms don’t translate, there are a few techniques that JS can benefit from. There are Haskell library functions for everything. At first I thought this was just because it was mature, but then I notice...

   JavaScript,Haskell,Functional,Reusability,Feature     2012-02-21 05:30:51

  Understand JavaScript prototype

For an front end programming language like JavaScript, if we want to understand its OOP feature, we need to understand its objects, prototype chain, execution context, closure and this keyword in deep. If you have a good understanding on these concepts, you should be confident that you can handle this language well. The inheritance in JavaScript is not class inheritance like Java, but it adopts another mechanism-- prototype inheritance. The key to prototype inheritance is the prototype chain mec...

   JavaScript, prototype, __proto__     2013-02-02 02:34:09

  jQuery to check whether checkbox is checked

In Vanilla JavaScript, the correct way of checking whether a checkbox is checked is to get the property checked of the checkbox. Assuming there is an checkbox with id "checkbox1", below line will return true if the checkbox is checked while it will return false if the checkbox is unchecked: document.getElementById("checkbox1").checked In jQuery, there are a few ways to check this. The first one is to using the corresponding counterpart of the Vanilla JavaScript, it is to check the checked proper...

   jQuery,checked,checkbox,attr,prop     2015-07-25 08:49:54

  Removing all child nodes from an element

When manipulating the DOM, it's often useful to remove all child nodes from a specific element. This typically comes in handy when you're looking to replace the content of an element with a separate form element, such as an <input>, so the user can edit the actual value.Here's an example of something I recently created that illustrates my point:Get the Flash Player to see this player.These "dynamic form elements" are written to the page only when the...

   Js,DOM,Remove all children,Clear,JavaScript,Code     2011-10-19 10:04:23

  UIWebView Secrets - Part1 - Memory Leaks on Xmlhttprequest

My first blog post on iphone subject reveal a big memory bug when using UIWebView component. This is the (only one) component to display some HTML content in an iphone interface. UIWebView object has a lot of differents issues and I’m going to highlight the biggest of them. Actually, all XMLHttpRequests used in javascript code are fully leaking!!! I mean when you do a request that retrieve 100ko of data, your memory used grow up for 100ko! This bug is not always active, but almost always....

   XMLHttpRequest,Memory leak,Mobile device,UIWebView     2011-11-25 13:46:30

  PHP to Objective C, where the f**k are parameters?

Javascript, PHP, Ruby functionsI assume you are very familiar with declaring functions in any of the languages above, if not, you should not be reading this. Let’s begin with a simple function to send email in these languages:// PHP or Javascript do_send_email (recipient, cc, subject, body); // Ruby do_send_email (recipient, cc, subject, body)So it’s clear by looking at the function’s signature that it takes 4 parameters and they could be optional, depends on your imple...

   Objective-C,PHP,JavaScript,Parameter,Function name     2012-01-16 09:46:09

  Gcd Algorithm with JavaScript

How to find the greatest common divisor between two integers? We may encounter this problem frequently in interviews or other occasions. An efficient metho to find gcd is the Euclidean algorithm, which uses the division algorithm in combination with the observation that the gcd of two numbers also divides their difference: divide 48 by 18 to get a quotient of 2 and a remainder of 12. Then divide 18 by 12 to get a quotient of 1 and a remainder of 6. Then divide 12 by 6 to get...

   JavaScript,Algorithm,Gcd,Implementation,     2011-09-21 15:57:32

  HTML5 Drag and Drop Upload and File API Tutorial

Update #3: Using the techniques outlined in this article I have rolled out and initial release of imgscalr.com.Feel free to download the JS source (it is heavily commented) and take a look at how it was rolled out. Unfortunately the required File API support is only in Chrome and Firefox currently, Safari gets it in version 6, Opera possibly in version 11 and possibly IE 10 (9 has no support).IntroductionOver the last day I’ve been trying to learn how to use the new HTML5 D...

   HTML5,Drag and drop,DnD,File API,Tutorial,Coding     2011-10-29 13:47:14

  Microsoft announces new Microsoft Band

Microsoft just announced a new Microsoft Band on a new product release event held in New York today. This new device is the second generation of the smart wearable device since the first generation announced around 1 year back(29 October, 2014). The biggest change of the new Microsoft Band is that it has a whole new design with curved screen. It now can be better adept to our body structure. In addition to this, there are a few other features as well. Below is a list of the features this new Mi...

   MICROSOFT BAND 2,MICROSOFT     2015-10-06 09:51:41

  Everything you need to know about what happened at Apple’s Special Event 2019

Apple’s special event that was announced in mid-November is finally over. The company held a presentation event in New York City where it highlighted the best apps and games of 2019 with no new software or hardware announcements at all.   On the event, five different nominations were announced: Apple’s chosen favourite apps, top free apps, top paid apps, top free games, and top paid games for 2019. Usual keynotes from Apple The tech industry is pretty accustomed to Apple’s...

   APPLE,EVENTS     2019-12-04 05:50:15

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