object function javascript code example

Example 1: how to define function in object javascript

// Functions that are defined inside objects are called methods.
let example = {
  calc: function (num1, num2) {
    return num1 + num2;
  },
};

// Calling the method
example.calc(1,2)

Example 2: object object javascript

person = {
    'name':'john smith'
    'age':41
};

console.log(person);
//this will return [object Object]
//use
console.log(JSON.stringify(person));
//instead

Example 3: object methods in javascript

/// OBJECTS IN JAVASCRIPT
const testScore = {
  damon: 89,
  shawn: 91,
  keenan: 80,
  kim: 89,
};

Object.keys(testScore);  // gives all keys
Object.values(testScore); // gives all values
Object.entries(testScore); // gives nested arrays of key-value pairs

// YOU CAN USE ( FOR-IN )  LOOP FOR ITERATION OVER OBJECTS
for (let person in testScore) {...} 

// WE CAN'T DIRECTLY USE ( FOR-OF ) LOOP IN OBJECTS BUT WE CAN DO Like THIS:
for(let score of Object.values(testScore)){
  	console.log(score)  // 89 91 80 89 
}