the rest operator javascript
function sum(...numbers) {
return numbers.reduce((accumulator, current) => {
return accumulator += current;
});
};
sum(1,2) // 3
sum(1,2,3,4,5) // 15the rest operator javascript
function sum(...numbers) {
return numbers.reduce((accumulator, current) => {
return accumulator += current;
});
};
sum(1,2) // 3
sum(1,2,3,4,5) // 15rest parameter
deleteUser = (id: number): void => {
const { [id]: user, ...updatedUsers } = this.users;
this.users = updatedUsers;
};
//a function within a class to delete a use. Also uses TS assignments on line 1.
//On line 2, [id]: user, uses both a computed property and the rest parameter to remove the user by id from this.users. this.users is then reassigned to updatedUsers, which we accessed via the spread operator.Copyright © 2021 Codeinu
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