clone object in js
var student = {name: "Rahul", age: "16", hobby: "football"};
//using ES6
var studentCopy1 = Object.assign({}, student);
//using spread syntax
var studentCopy2 = {...student};
//Fast cloning with data loss
var studentCopy3 = JSON.parse(JSON.stringify(student));merge two objects javascript
const object1 = {
name: 'Flavio'
}
const object2 = {
age: 35
}
const object3 = {...object1, ...object2 } //{name: "Flavio", age: 35}javascript merge objects
var person={"name":"Billy","age":34};
var clothing={"shoes":"nike","shirt":"long sleeve"};
var personWithClothes= Object.assign(person, clothing);//merge the two objectmerge objects javascript
const a = { b: 1, c: 2 };
const d = { e: 1, f: 2 };
const ad = { ...a, ...d }; // { b: 1, c: 2, e: 1, f: 2 }javascript merge objects
// reusable function to merge two or more objects
function mergeObj(...arr){
return arr.reduce((acc, val) => {
return { ...acc, ...val };
}, {});
}
// test below
const human = { name: "John", age: 37 };
const traits = { age: 29, hobby: "Programming computers" };
const attribute = { age: 40, nationality: "Belgian" };
const person = mergeObj(human, traits, attribute);
console.log(person);
// { name: "John", age: 40, hobby: "Programming computers", nationality: "Belgian" }javascript merge objects
/**
* Simple object check.
* @param item
* @returns {boolean}
*/
export function isObject(item) {
return (item && typeof item === 'object' && !Array.isArray(item));
}
/**
* Deep merge two objects.
* @param target
* @param ...sources
*/
export function mergeDeep(target, ...sources) {
if (!sources.length) return target;
const source = sources.shift();
if (isObject(target) && isObject(source)) {
for (const key in source) {
if (isObject(source[key])) {
if (!target[key]) Object.assign(target, { [key]: {} });
mergeDeep(target[key], source[key]);
} else {
Object.assign(target, { [key]: source[key] });
}
}
}
return mergeDeep(target, ...sources);
}Copyright © 2021 Codeinu
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