The JavaScript Interview Handbook: 100+ Interview Questions/

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Solution Review: Destructure Undefined

Solution Review: Destructure Undefined

This lesson will explain the solution to the problem in the previous lesson.

We'll cover the following...

The challenge in the previous lesson requires you to fix the following code using your understanding of object destructuring.

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function pointValues(point){
    const {name:n,age:a} = point 
    console.log(n)
    console.log(a)
}
var point = {name:"jerry", age: 2}
pointValues(point)
point = undefined
pointValues(point)

Solution 1 #

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function pointValues(point){
    const {name:n,age:a} = {...point} 
    console.log(n)
    console.log(a)
}
pointValues({name:"jerry", age:2})
pointValues(undefined)

Explanation #

The original code displays the name and age values of point if it is defined as an object; however, it gives an error if it is undefined. The ...