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JS objects copies, shallow, deep, lodash etc ...

JavaScript

copies.js Raw #

/*
All ways 
===========
https://code.tutsplus.com/articles/the-best-way-to-deep-copy-an-object-in-javascript--cms-39655 

*/


let a = {
	user: 'A',
	age: 99,
	hobbies: {
		sport: ['soccer', 'hockey'],
		others: ['sleeping']
	}
}

// only shallow copy
let b = {...a}

b.age = 50
b.user = 'B'
b.hobbies.sport = ['ping-pong']
b.hobbies.others = ['eating hamburgers']


// deep copy with nested
let c = JSON.parse(JSON.stringify(a));


c.age = 20
c.user = 'C'
c.hobbies.sport = ['swimming']
c.hobbies.others = ['tv & music']

console.log(a)
console.log(b)
console.log(c)