How Does Destructuring Work?
Destructuring is a great way to quickly unpack data and assign it to variables. It can save time and make code more readable. It can also be used to quickly assign values to multiple variables at once, which can be useful when dealing with large amounts of data.
A fourth common mistake is attempting to destructure an array which contains nested arrays. This can be difficult to debug as the template must be written to match the nested array structure. Additionally, it is important to remember that destructuring an array does not create a copy of the array, but instead creates a reference to the original array. This means that any changes made to the destructured array will also be reflected in the original array.
It is also important to remember that destructuring can be used to assign values to existing variables, as well as to create new variables. This can be useful when you need to assign values from an array or object to existing variables, or when you need to assign values from an array or object to multiple variables at once. Additionally, when using destructuring, it is important to remember that the order of the variables on the left-hand side of the statement must match the order of the items in the source array or object.
Easily renaming variables: const [firstName, lastName] = [‘John’, ‘Smith’];
Swapping values between variables: let x=4, y=5; [x,y] = [y ,x] //x now equals 5 and y now equals 4
Returning multiple related values from a function: const getName =()=> [‘John’,’Smith’]; const [nameA ,nameB] = getName; //nameA = ‘John’, nameB = ‘Smith’;