Question

How to loop through an object with for loop in TypeScript

Answer 1

const student = { 
    name: 'Anakin',
    age: 29,
    hobbies: ['flight', 'lightsaber', 'coding']
};
   
for (let [key, value] of Object.entries(student)) {
    console.log(key + " - " +  value);
}
   
      
      
/*
run:
      
name - Anakin
age - 29
hobbies - flight,lightsaber,coding
      
*/

 

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Answer 2

const student = { 
    name: 'Anakin',
    age: 29,
    hobbies: ['flight', 'lightsaber', 'coding']
};
  
for (let key in student) {
    let value: any = student[key]; 
    console.log(key + " - " + value);
}
  
     
     
/*
run:
     
name - Anakin
age - 29
hobbies - flight,lightsaber,coding
     
*/

 

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Answer 3

const student = { 
    name: 'Anakin',
    age: 29,
    hobbies: ['flight', 'lightsaber', 'coding']
};
  
for (let key in student) {
    let value = student[key as keyof typeof student]; 
    console.log(key + " - " + value);
}
  
      
      
/*
run:
      
name - Anakin
age - 29
hobbies - flight,lightsaber,coding
      
*/

 

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Answer 4

const student = { 
    name: 'Anakin',
    age: 29,
    hobbies: ['flight', 'lightsaber', 'coding']
};
  
for (let key in student) { 
    let value: any = student[key];
    console.log(value);
    console.log(key + " - " + value[0] + ", " + value[1] + ", " + value[2] + ", " + value[3]); 
    console.log("------------------");
}
  
      
      
/*
run:
      
Anakin
name - A, n, a, k
------------------
29
age - undefined, undefined, undefined, undefined
------------------
[ 'flight', 'lightsaber', 'coding' ]
hobbies - flight, lightsaber, coding, undefined
------------------
      
*/

 

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