Tuples gather multiple values in a specific order which can be retrieved with their indexes.
To define a tuple, use parenthesis and the , operator :
type full_name = (string, string);
And to define a value of this type :
let person : full_name = ("Jack", "Oneill");
If we want to get the first and last name of the full_name type, we can use destructuring. Destructuring a tuple allows you to give names to the elements inside the tuple.
let (first_name, last_name) : full_name = person
This also works in functions:
let first_name = ((first_name, _): full_name) => first_namelet jack = first_name(person)
Notice that we use the underscore to indicate that we ignore the last element of the tuple.
You can access each component of a tuple by their position. Tuple components are zero-indexed, that is, the first component has index 0.
let first_name : string = person;let last_name : string = person;
1- Create a tuple type coordinates representing a 3D location.
2- Define earth_coordinates at coordinates 2,7,1.
3- Let’s say you made a mistake in the definition. Define a new constant modifiedearthcoordinates which reuses parameters of earth_coordinates except for the last parameter of earth_coordinates which is fixed to 5. Direct access by postion is asked (do not destructure earth_coordinates)