Understanding Rest Syntax
The rest parameter syntax allows us to represent an indefinite number of arguments as an array. This is particularly useful for creating flexible functions like mathematical calculators or data formatters.
function myBio(firstName, lastName, ...otherInfo) {
// otherInfo will be an array of everything after lastName
}
Key Features:
- Array Methods: Because it's a real array, you can use
.sort(),.pop(), or.forEach()immediately. - One per function: You can only have one rest parameter per function.
- Final position: It must be the last parameter in the function definition.