I will add java scripts code
- 3 Ways to Copy or Clone Array in Javascript clonearray.js
- Higher Order Functions in Javascript highorderfuntion.js
- destructuring with rest operator(Array VS object) destructuring.js
- Rest Parameter in Javascript
- Spred Operator
- Mutubale Vs Imutable
#Common Javascript Error that you should know
https://rollbar.com/blog/top-10-javascript-errors-from-1000-projects-and-how-to-avoid-them/
var codeJS = null;
console.log(codeJS); //output is null
console.log(typeof codeJS); //output is object
var codeJS;
console.log(codeJS); //output is undefined
console.log(typeof codeJS); //output is undefined
console.log(null==undefined);
//output is true
console.log(null===undefined); //output is false
https://www.toptal.com/javascript/10-most-common-javascript-mistakes