Skip to main content

function composition (function programming) over inheritance javascript with example

working link

https://stackblitz.com/edit/js-d57tvk


more about

https://www.youtube.com/results?search_query=functional+programming+vs+object+oriented+javascript


a better link

https://www.youtube.com/watch?v=7HolHe7Gqbw&t=263s


example :-

//function composition (function programming) over inheritance
//create some global function every thing except number and string are object in javascript


//@function showName----------------------------
const showName=(state)=>({
getfullName()
{
return state.name+" "+state.last;
}
});
//@function showSalary----------------------------
const showSalary=(state)=>(
{
bonus:800,
getSal()
{
return state.sal*12+this.bonus;
}
}
)
//@function what emp do
const WhatHeDo=(state)=>(

{
getType()
{
switch(state.type) {
case "it":
this.type="you are a it emp";
break;
case "game":
this.type="you are a game developer"
break;
default:
// code block
}
return this.type;
}
}
)

//emp class which is function as we know every function is a constructor in javascript
function emp(_name,_last)
{
let objRef={
name:_name,
last:_last
}
return Object.assign(objRef,showName(objRef));
}

//create a new class itEmp which hold some properties
function itEmp(_sal,_type)
{
let objRef={
sal:_sal,
type:_type
}
return Object.assign(objRef,showSalary(objRef),WhatHeDo(objRef));
}

//copy or you can say copy properties from source to destination
//where source is emp calss and destination is itEmp class

//first object
let itemp=Object.assign(itEmp(2000,"it"),emp("manish","chauhan"))
console.log(itemp.getfullName())
console.log(itemp.getSal())
console.log(itemp.getType());


//second object
let gameemp=Object.assign(itEmp(2100,"game"),emp("sachin","chauhan"))
console.log(gameemp.getfullName())
console.log(gameemp.getSal());
console.log(gameemp.getType());

Comments

Post a Comment

Popular posts from this blog

Creating a word Scramble game where you can drag and drop the word and create a complete word. (drag and drop word Scramble game).

Creating a word game using  phaser game engine which is a javascript based gaming engine  where u can drag and drop world like Word Scramble Game and complete a given word. your index.html file look like below < html > < head > < script src = "src/phaser.min.js" ></ script > < script src = "src/wordGame.js" ></ script > < script src = "src/main.js" ></ script > </ head > < body > </ body > </ html > 1.    <script src="src/phaser.min.js"></script> required to run the  phaser game engine. 2. rest of the two files deals with game logics      <script src="src/wordGame.js"></script>       <script src="src/main.js"></script> you can download whole project from https://github.com/manishchauhan/wordgame/tree/master just copy and paste the project in your local server and run ...
Post a Comment
Read more

A simple binary search tree with generic approach tree can store any type of data. (DFS and BFS)

 1. a binary search tree in c++ using a generic approach with both BFS and DFS approach    working tree    https://www.onlinegdb.com/edit/HkuQLdA-w code=> some properties of binary search tree-> 1. binary search tree is not always a balanced tree.  2. Inorder, traversing gives you sorted data.  3.  best is o(log n) and worst is O(n).  4. left node data is always less than root data and right node data always be greater than root data.  5. red-black tree STL map is a balanced binary search tree. *******************************************************************************/ #include <stdio.h> #include<iostream> #include<queue> using namespace std; template < typename T > class Node {   //can store any type of data private:   //genric data or store any type of data   T data;   //reference of left pointer   Node *left = nullptr;   //reference of right pointer   Node *rig...
Post a Comment
Read more

starting with three.js and react with a very simple example

 1. three.js is undoubtedly the best library to create interactive content for the web in 3d. link https://threejs.org/ a working sample of three with react can be found below https://stackblitz.com/edit/react-7n5qf9?file=src%2FApp.js why choose threejs 1. lightweight  2.fast 3.big community  https://discourse.threejs.org/ 4. even you can use unity or unreal to publish html5 content but i don't think that would be acceptable in many cases. 5. open-source project. i created a running sample with React  https://stackblitz.com/edit/react-7n5qf9?file=src%2FApp.js
Post a Comment
Read more