Sử dụng Tuple trong TypeScript

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var empId: number = 1;
var empName: string = "Steve";        

// Tuple type variable 
var employee: [number, string] = [1, "Steve"];

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var employee: [number, string] = [1, "Steve"];
var person: [number, string, boolean] = [1, "Steve", true];

var user: [number, string, boolean, number, string];// declare tuple variable
user = [1, "Steve", true, 20, "Admin"];// initialize tuple variable

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var employee: [number, string][];
employee = [[1, "Steve"], [2, "Bill"], [3, "Jeff"]];

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var employee: [number, string] = [1, "Steve"];
employee[0]; // returns 1
employee[1]; // returns "Steve"

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var employee: [number, string] = [1, "Steve"];
employee.push(2, "Bill"); 
console.log(employee); //Output: [1, 'Steve', 2, 'Bill']

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var employee: [number, string] = [1, "Steve"];

// retrieving value by index and performing an operation 
employee[1] = employee[1].concat(" Jobs"); 
console.log(employee); //Output: [1, 'Steve Jobs']