ES6 Destructuring
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The older method of accessing and assigning values from an array was indexing:
const myArray = ['car', 'jet', 'spaceship'];
const landVehicle = myArray[0];
const airVehicle = myArray[1];
const spaceVehicle = myArray[2];
However, ES6 has introduced a new method called destructuring, which enables us to access and assign values from an array easily:
const [ landVehicle, airVehicle, spaceVehicle ] = myArray;
console.log (landVehicle);
The above method is much neater and requires less code.
We can also skip the elements we don't want to capture, for example, we can skip airVehicle but add an extra comma:
const [ landVehicle, , spaceVehicle ] = myArray;
Note
The
constkeyword is for defining constant terms, you can also use theletkeyword in the Destructuring statement.
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セクション 1. 章 6
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セクション 1. 章 6