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121 lines (84 loc) · 2.22 KB
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/*
Clase 35 - Desestructuración y propagación
Vídeo: https://youtu.be/1glVfFxj8a4?t=15747
*/
let myArray = [1, 2, 3, 4]
let person = {
name: "Brais",
age: 37,
alias: "MoureDev"
}
let myValue = myArray[1]
console.log(myValue)
let myName = person.name
console.log(myName)
// Desestructuración
// Sintaxis arrays
let [myValue0, myValue1, myValue2, myValue3, myValue4] = myArray
console.log(myValue0)
console.log(myValue1)
console.log(myValue2)
console.log(myValue3)
console.log(myValue4)
// Sintaxis arrays con valores predeterminados
let [myValue5 = 0, myValue6 = 0, myValue7 = 0, myValue8 = 0, myValue9 = 0] = myArray
console.log(myValue5)
console.log(myValue6)
console.log(myValue7)
console.log(myValue8)
console.log(myValue9)
// Ignorar elementos array
let [myValue10, , , myValue13] = myArray
console.log(myValue10)
console.log(myValue13)
// Sintaxis objects
let { name, age, alias } = person
console.log(name)
console.log(age)
console.log(alias)
// Sintaxis objects con valores predeterminados
let { name2, age2, alias2, email = "email@email.com" } = person
console.log(name2) // No existe
console.log(age2) // No existe
console.log(alias2) // No existe
console.log(email)
// Sintaxis objects con nuevos nombres de variables
let { alias: alias3, name: name3, age: age3 } = person
console.log(name3)
console.log(age3)
console.log(alias3)
// Objects anidados
let person3 = {
name: "Brais",
age: 37,
alias: "MoureDev",
walk: function () {
console.log("La persona camina.")
},
job: {
name: "Programador",
exp: 15,
work: function () {
console.log(`La persona de ${this.age} años de experiencia trabaja.`)
}
}
}
let { name: name4, job: { name: jobName } } = person3
console.log(name4)
console.log(jobName)
// Propagación (...)
// Sintaxis arrays
let myArray2 = [...myArray, 5, 6]
console.log(myArray2)
// Copia de arrays
let myArray3 = [...myArray]
console.log(myArray3)
// Combinación de arrays
let myArray4 = [...myArray, ...myArray2, ...myArray3]
console.log(myArray4)
// Sintaxis objects
let person4 = { ...person, email: "braismoure@mouredev.com" }
console.log(person4)
// Copia de objects
let person5 = { ...person }
console.log(person5)