Question

How to create and use an array of objects in TypeScript

Answer 1

type CompanyWorker = {
    id: number;
    name: string;
    age: number;
};
   

const workers: CompanyWorker[] = [
    {
        id: 82927, name: "Axel", age: 37
    },
    {
        id: 98272, name: "Arti", age: 41
    },
    {
        id: 76362, name: "Isla", age: 31
    }
];

for (let i = 0; i < workers.length; i++) {
    console.log(workers[i].id + " " + workers[i].name);
}

  
  
/*
run:
  
"82927 Axel" 
"98272 Arti" 
"76362 Isla" 
  
*/

 

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Answer 2

type CompanyWorker = {
    id: number;
    name: string;
    age: number;
};
   

const workers: CompanyWorker[] = [
    {
        id: 82927, name: "Axel", age: 37
    },
    {
        id: 98272, name: "Arti", age: 41
    },
    {
        id: 76362, name: "Isla", age: 31
    }
];

console.log(workers[0].id + " " + workers[0].name + " " + workers[0].age);
console.log(workers[2].id + " " + workers[2].name + " " + workers[2].age);

  
  
/*
run:
  
"82927 Axel 37" 
"76362 Isla 31"
  
*/

 

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Answer 3

type CompanyWorker = {
    id: number;
    name: string;
    age: number;
    show_details?: () => string;
};
   

const workers: CompanyWorker[] = [
    {
        id: 82927, 
        name: "Suki", 
        age: 37,
        show_details() {
            return(this.id + " " + this.name + " " + this.age);
        }
    },
    {
        id: 98272, name: "Arti", age: 41
    },
    {
        id: 76362, name: "Isla", age: 31
    }
];

console.log(workers[0].show_details?.());

  
  
/*
run:
  
"82927 Suki 37" 
  
*/

 

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