Array Map, Filter, Reduce methods (Array mfr in short)

Use map when you want to change each value in the array based on some logic

var mappedArray = [2,4].map(number => number * 2)

console.log(mappedArray)


Use filter when you want filter out some values from an array based on some logic

var filteredArray = [1,2,3,4].filter(number => (number % 2 === 0))

console.log(filteredArray)


Use reduce when you want to reduce an array into a single resulting value

var reducedArray = [1,2,3,4].reduce((total,number) => total + number, 0)

console.log(reducedArray)

Cute reference: https://medium.com/@joshpitzalis/the-trouble-with-loops-f639e3cc52d9

How do you debug a script file that is executed using NodeJS?

node --inspect --debug-brk index.js

Read more: https://medium.com/@paul_irish/debugging-node-js-nightlies-with-chrome-devtools-7c4a1b95ae27

What is Bash in Linux?

A nice article on Shell, Bourne Shell, Bourne again Shell that explains as simple as "Shell is the glue between you and the Kernell.". A must read: http://www.macdevcenter.com/pub/a/mac/2004/02/24/bash.html

Slideshow Using CSS and jQuery

I was looking for a simple solution to implement the slideshow of the images in one of my web sites. Found a simple solution here: https://css-tricks.com/snippets/jquery/simple-auto-playing-slideshow/. Simple and elegant!

Stock Market: Short Selling

In terms of Stock Market...Short selling is borrowing the shares from a company, and sell them &&& when the share prices are low, buy them from market and give them back to that company. Since you sold the shares at a high price and bought them at a low price and gave them back, you get to keep the difference.

Read this interesting article on TradeKing.

Definitions

• What is SSH? 
• Cloud computing IaaS, Paas, SaaS.
• what is CI/CD?

Responsive Web Design

Three things to be considered for Responsive Web Design:

1. Fluid layouts
2. Fluid Images
3. CSS Media Queries

And I come across this nice web site where the author has explained all three of them with a simple example. A very nice job.

http://www.entheosweb.com/website_design/responsive_web_design.asp