Sometimes, it is useful to see the list of packages that you have installed on your system. You can do that with the following commands:

# list all installed modules with dependencies

# list all installed modules without dependencies

# list all installed globally dependencies

npm init is the command to create a node project.

npm init is a tool for creating (or modifying) a project’s package.json file.

When you enter the command npm init on your terminal, it will take you through a series of questions, for which, you can either go with default answers or can give different answers.

This is how it looks like in my terminal, after running npm init command.

http://www.savetheinternet.in/

Have you watched the Aircel and MTS advertisements?

If not, watch it now. Listen carefully. At the end of both the advertisements, it says Free Facebook and Whatsapp or Free Whatsapp and Viber.

I always wondered, why they have to specifically mention Facebook and whatsapp are free, when they are actually free.

Now I know the answer.

Net Neutrality Matters.

If you wonder, what is net neutrality, why it is important read the following articles carefully, and do something.

Unlike many other programming languages, JavaScript enables you to freely pass functions around to be executed at a later time. A callback is a function that is passed as an argument to another function and is executed after its parent function has completed. Callbacks are special because they patiently wait to execute until their parent finishes. Meanwhile, the browser can be executing other functions or doing all sorts of other work.
A definition taken from jquery website

Reference: Michael Vollmer

One should also understand about callback hell

Minification is the process of removing comments and unnecessary whitespace from a program. Depending on how the program is written, this can reduce the size by about half.

for example

prerequisites

1. install node js and npm
2. install yuicompressor using the command npm install yuicompressor

A short tutorial on, how to use yuicompressor is available on https://www.npmjs.com/package/yuicompressor

Here is a small javascript program which helps you to compress multiple files.

JSFIDDLE: http://jsfiddle.net/jnelsonin/ctfy158o/

This simple formula will help you to convert a px value in CSS to corresponding em, % and pt.

consider we have a pixel value of 8. Based on the above formula,

pt = (8 * 3) / 4 = 6pt

em = 8 / 12 = 0.5em

% = 0.5 * 100 = 50%

[table id=6 /]

You can donate blood if

• you are between age group of 18-60 years
• your weight is 45 kgs or more
• your hemoglobin is 12.5 gm% minimum
• Your last blood donation was 3 months earlier
• you are healthy and have not suffered from malaria, typhoid or other transmissible disease in the recent past
• you have eaten a low fat healthy diet few hours before donating blood

Do not donate blood if you have any of the following conditions: