how to use the assignin function from lodash in javascript

The assignin function from lodash is used to assign properties of one or more source objects to a destination object in a shallow manner; that is, only the top-level properties are assigned and any nested properties are not merged. Here is how you can use the assignin function in JavaScript:

index.tsx
const _ = require('lodash');

const sourceObj1 = { name: 'John', age: 25 };
const sourceObj2 = { occupation: 'Programmer', language: 'JavaScript' };
const destObj = { name: 'Jane' };

_.assignIn(destObj, sourceObj1, sourceObj2);

console.log(destObj); // Output: { name: 'John', age: 25, occupation: 'Programmer', language: 'JavaScript' }
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In this example, we first require lodash using const _ = require('lodash');. We then create three objects: sourceObj1, sourceObj2, and destObj. The sourceObj1 and sourceObj2 objects contain the properties we want to assign to destObj. The destObj object has an existing name property which will be overwritten by the value of name property in sourceObj1.

We then use the _.assignIn(destObj, sourceObj1, sourceObj2); statement to assign the properties of the sourceObj1 and sourceObj2 objects to the destObj. Since destObj is the first argument in the assignIn function, its properties will be overwritten by any matching properties of the source objects. The result is logged to the console using console.log(destObj);.

This will output { name: 'John', age: 25, occupation: 'Programmer', language: 'JavaScript' }, which shows that the properties from both source objects have been assigned to the destination object.