TechLog

An Introduction to Web Workers

Overview

Browsers use single thread for JavaScript and UI. So synchronous JavaScript calls will block this thread, thus rendering will be blocked. For example, if our website needs to do UI events, fetch and process large amount of API data and manipulate DOM. It is not possible do all these simultaneously since the script execution happens within a single thread, in browsers.

For example run the…

Getting Started with IndexedDB

Overview

IndexedDB  is an API for storing significant amounts of structured data in user’s browser. It helps to do high performance  searches using indexes. The data stored in IndexedDB is persistent and work in online and offline.  It provides both a synchronous and an asynchronous API. In practice, however, all current implementations are asynchronous, and requests will not block the user…

Overview

There are of different ways to store data from website into your local machine, more specifically in your browsers. Most commonly used and traditional way is store data into cookies.

There is some limitations and drawbacks are there when using cookies, some of them are,

Cookies are limited to about 4 KB of data.

No Security for Sensitive Data.

Cookies are send along with every HTTP…

Getting Started With Handlebars.js – Templating Engine for JavaScript.

  Handlebars.js is a Logic-less template engine for JavaScript. When we need an application with frequently updating view, template engine has to play big role. It keep you HTML pages simple, clean and decouples from logic based JavaScript files. Also reduce effort by reducing loops with native JavaScript.

It is also possible to precompile your templates with handlebar js. This will result in a…

Facebook launches a new JavaScript static type checker, designed to find type errors in JavaScript programs.

Check Official site http://flowtype.org/

As its documentation says,

“The goal of Flow is to find errors in JavaScript code with little programmer effort. Flow relies heavily on type inference to find type errors even when the program has not been annotated – it precisely tracks the types…

If you have problem with git commands like ‘ git status,git pull ‘ etc. and got error message as follows,

$ git status error: bad index file sha1 signature fatal: index file corrupt

Don’t worry. Just remove your git index file and restore. To be safe make a backup of your index ‘.git/index ‘ before remove.

rm .git/index git reset

A text shortening plugin with help of css and jquery. Try it and modify as your need. It is my small attempt contribute open-source codes.

Find project on git hub. github url : https://github.com/safeer-in/more_less

How to Use:

Image preview before upload file

We can preview the uploaded image easily with jQuery or JavaScript before actual upload of file.

Just Follow these Steps

HTML Code

<form id="Imgfrm"> <input id="imgfile" type="file" /> <img id="preview" src="#" alt="your image" />< /form>

Then use following jQuery Code (You can use pure JavaScript also)

$("#imgfile").change(function(){ if (this.files && this.files[0]) { var reader =…

Originally posted on Java J2EE Android Dev:

Just Uploaded ppt for “Introduction To NOSQL”.

Have a look and feel free to share your views.

View original

Youtube API – Browse Based Upload

Originally posted on Web +:

Step – 1 : Upload Video Metadata

ACCESS_TOKEN

DEVELOPER_KEY

CONTENT_LENGTH

API_XML_Request

HTML Form

<form action=”<?=base_url()?>index.php/controller/method” method=”post” > <table style=”margin: 0 auto”> <tr><td>Title : </td><td><input type=”text” name=”title” /></td></tr> <tr><td>Description : </td><td><textarea name=”description”></textarea> </td></tr>

Building a RESTful Service using CodeIgniter

Originally posted on Me Bhoomi:

I recently built a RESTful web service to integrate two web applications, and I thought I would document that effort for the benefit of others. If you need to implement a RESTful service, this tutorial will give you a quick start.

First off, I am happy to report that the CodeIgniter PHP application framework makes it very easy to build a RESTful service.…

Facebook Page Tab (App) Tutorial

You can integrate custom pages in to your facebook pages via Page Tab Applications. This post will…

Display Products from Specific Category on Home Page - Magento

First you have to note the ID of category you want to display at the home page. You can find this…

By default, the index.php file will be included in your URLs. You can easily remove this file by using a .htaccess file with some simple rules.

To remove index.php from codeigniter url follow the steps,

Create .htaccess file on the root folder (in project…

In Ubuntu/Linux, there is no direct method to hide files and folders like windows. You should rename the files and folders.

Hide files and folders

Rename file/folder with “.”(dot) in front of name.

For example, if  you want to hide a folder “Work” then…

In Ubuntu and other Debian based distributions, “adduser” package is used for account management.

To add a user account, use the following syntax, and follow the prompts to give the account a password and identifiable characteristics such as a full name,…