How to use a custom function In Javascript
In this approach, we define the areObjectsEqual function, which compares two objects obj1 and obj2. It first checks if the number of keys in both objects is the same; if not, it returns false.
Example: In this example, we are using a custom function areObjectsEqual, the example compares two objects obj1 and obj2, returning true as they have equivalent properties and values.
function areObjectsEqual(obj1, obj2) {
const keys1 = Object.keys(obj1);
const keys2 = Object.keys(obj2);
if (keys1.length !== keys2.length) {
return false;
}
for (const key of keys1) {
if (obj1[key] !== obj2[key]) {
return false;
}
}
return true;
}
let obj1 = {
name: "John",
age: 23,
degree: "CS"
};
let obj2 = {
name: "John",
age: 23,
degree: "CS"
};
console.log(areObjectsEqual(obj1, obj2));
Output
true
How to compare two objects to determine the first object contains equivalent property values to the second object in JavaScript ?
In this article, we are going to learn about comparing two objects to determine if the first object contains equivalent property values to the second object, In JavaScript, comparing the values of two objects involves checking if they have the same properties with corresponding values. Given two objects obj1 and obj2 and the task are to check that obj1 contains all the property values of obj2 in JavaScript.
Input: obj1: { name: "John", age: 23; degree: "CS" }
obj2: {age: 23, degree: "CS"}
Output: true
Input: obj1: { name: "John", degree: "CS" }
obj2: {name: "Max", age: 23, degree: "CS"}
Output: false
To solve this problem we follow the following approaches.
Table of Content
- Using for..in loop
- Using Object.keys() and Array.every()
- Using JSON.stringify()
- Using a custom function
- Using Object.entries()
- Using Map Object
We will explore all the above methods along with their basic implementation with the help of examples.