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DESTRUCTURING ARRAYS IN JS

ndonnauc profile image Ndonna ・2 min read

Hi I am Ndonna Ugwuede a javaScript newbie, and as a noob in javaScript i found it hard understanding Destructuring, even after reading many materials and watching tutorial videos it was still sounding strange but thanks to Mark Zamoyta i finally got a grasp of it.

Firstly, what do you need destructuring for?

Destructuring gives us an avenue to name our Array/Object items as against the regular calling of array items with "arrayName[0]" or Objects with "object.key".

DESTRUCTURING ARRAYS

You can destructure an array using the syntax let [name1, name2, name3] = names; where names is an already existing array. Using an example we have an array named Cars with content ["Benz", "Honda", "Nissan", "Toyota", "Ford"] and we want to assign them to variables namely car1, car2, car3, car4, car5. Going the old school way we would to go through assigning each with:
let car1 = Cars[0], car2 = Cars[1], .... etc
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Destructuring has brought a simpler way to do this where you can name array items where we can name our array items using:
let [car1, car2, car3, car4, car5] = Cars;
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You could even assign the remaining items into another named array using a rest operator (...), if we aren't sure of the number of items to be named.
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Another beauty is we could skip some items, if we are sure of what to skip, some strategic items we are sure of we could be removed by putting a comma in its place e.g we could remove our first and second item of the array using:
let [,,car3, car4, car5] = Cars;
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Destructuring also works fine with/on Objects, I'll be making another post explaining DESTRUCTURING OBJECTS IN JS, in the near future but in the meantime you could reach out to me on twitter: https://twitter.com/Ndonnauc

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ndonnauc profile

Ndonna

@ndonnauc

A Frontend Developer and aspiring MERN Stack Developer.

Discussion

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Wow! I didn't know about the skip feature!

Thats new. I'll try it out! 🔥🔥