understanding-destructuring-rest-spread/

[utterances-bot]

Understanding Destructuring, Rest Parameters, and Spread Syntax | Tania Rascia

This article was originally written for DigitalOcean. Introduction Many new features for working with arrays and objects have been made…

https://www.taniarascia.com/understanding-destructuring-rest-spread/

[riazXrazor]

very insightful thanks !!

[prashanthaKumar]

It's a very informative article

[Lcfvs]

Nice article but misses 2 useful tricks:

• property aliasing

  
  const o = { a: 1 }
  const name = 'a'
  const { [name]: value } = o

console.log(value) // 1

 * **arguments skipping**
```js
function getThird(...[,,third]) {
  return third
}

console.log(getThird(1, 2, 3)) // 3

[alexleduc76]

When needing immutability, I find the spread syntax overly verbose compared to this:

deepCopy = (obj) => { return JSON.parse(JSON.stringify(obj)) }

[Lcfvs]

@alexleduc76 Except that: your deep copy doens't preserves the methods, prototypes chain, map, etc.

[alexleduc76]

@Lcfvs That's true, however I have never had a need to deep copy anything but objects and arrays containing primitive values.

[alexleduc76]

(except nested array and objects of course.)

[rolandoivan23]

Thank you, great post.