Lodash _.omitBy() Method

Lodash is a JavaScript library that works on the top of underscore.js. Lodash helps in working with arrays, strings, objects, numbers, etc.

The _.omitBy() method is used to return a copy of the object that composed of the own and inherited enumerable string keyed properties of the object that predicate doesn’t return truthy for. It is the opposite of _.pickBy() method.

Syntax:

_.omitBy( object, predicate )

Parameters: This method accepts two parameters as mentioned above and described below:

• object: This parameter holds the source object.
• predicate: This parameter holds the function that is invoked for every property. It is an optional value.

Return Value: This method returns the new object.

Example 1:

Javascript

// Requiring the lodash library
const _ = require("lodash");

// The source object
var obj = {
    Name: "GeeksforGeeks",
    password: 123456,
    username: "your_geeks"
 }

// Using the _.omitBy() method
console.log(_.omitBy(obj, _.isLength));

Output:

{Name: "GeeksforGeeks", username: "your_geeks"}

Example 2: 

Javascript

// Requiring the lodash library
const _ = require("lodash");

// The source object
var obj = { 'x': 1, 'y': '2', 'z': 3 };

// Using the _.omitBy() method
console.log(_.omitBy(obj, _.isNumber));

Output:

{'y': '2'}

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