swapnilmishra

{
  "version": "0.2.0",
  "configurations": [
    {
      "type": "node",
      "request": "launch",
      "name": "Jest All",
      "program": "${workspaceFolder}/node_modules/.bin/jest",
      "args": ["--runInBand"],
      "console": "integratedTerminal",

swapnilmishra

Function programming
===================

Where Computations are modelled as evaluation of expressions

1. Functions are first class citizens - HOC, map
2. Functions don't produce side effects - 
    2.1 dont't access global variables, produce same return value given the same arguments
    2.2 Uses immutable data structures
    2.3 Memoization/Lazy evaluation - since with same arguments function return values are same they can be memoize

swapnilmishra

React lifecycle methods

constructor()
componentWillMount()
render()
componentDidMount()


componentWillReceiveProps(nextProps) - setState() can be called

swapnilmishra

1. The render() function should be pure, meaning that it does not modify component state, 
it returns the same result each time it's invoked, and it does not directly
interact with the browser. If you need to interact with the browser,
perform your work in componentDidMount() or the other lifecycle methods instead. 
Keeping render() pure makes components easier to think about.

2. componentWillMount() - This is the only lifecycle hook called on server rendering.
Generally, we recommend using the constructor() instead.

3. componentDidMount() is invoked immediately after a component is mounted.

swapnilmishra

echo -n "Enter Component name > "
read componentName
mkdir -p -- "$componentName"
cd $componentName
{
echo "import React, { Component } from 'react';"
echo "import { observer, inject } from 'mobx-react';"
echo "import styles from './style.scss';"

swapnilmishra

function underscoreToCamelCase(param){
	var paramArray, firstLetter,camelCased='';
	try{
		paramArray = param ? param.split('_') : [];
		// case where there is no underscore
		if(paramArray.length < 2){
			return (paramArray.length>0 ? paramArray[0].toLowerCase() : param);
		}
		for (var i = 1; i < paramArray.length; i++) {
			firstLetter = paramArray[i].charAt(0);

swapnilmishra

function getCardType(cardNum) {

    if(!luhnCheck(cardNum)){
	return "";
    }
    var payCardType = "";
    var regexMap = [
      {regEx: /^4[0-9]{5}/ig,cardType: "VISA"},
      {regEx: /^5[1-5][0-9]{4}/ig,cardType: "MASTERCARD"},
      {regEx: /^3[47][0-9]{3}/ig,cardType: "AMEX"},

swapnilmishra

function extend(Child,Parent){
  var F = function(){};
  F.prototype = Parent.prototype;
  Child.prototype = new F();
  Child.prototype.constructor = Child;
}

swapnilmishra

module.exports = function(grunt) {

  grunt.initConfig({

    /*
      copy header-template.html which will have placeholders for injecting css,js
    */
    copy: {
      main: {
        files: [