javascript-lodashHow can I use Lodash to filter an array in JavaScript?

Lodash is a JavaScript library that provides utility functions for common programming tasks. It can be used to filter an array in JavaScript by using the _.filter() function.

The _.filter() function takes two arguments: an array and a predicate function. The predicate function is a function that returns true or false for each element in the array.

Example

const array = [1, 2, 3, 4, 5];

const result = _.filter(array, (element) => element % 2 === 0);

console.log(result);
// Output: [2, 4]

In the example above, the predicate function (element) => element % 2 === 0 checks if the element is even or odd. If the element is even, it returns true and the element is added to the result array.

The _.filter() function can also be used with an object array. The predicate function should return true or false based on the object property values.

Example

const array = [
  { name: 'John', age: 25 },
  { name: 'Jane', age: 18 },
  { name: 'Joe', age: 32 },
];

const result = _.filter(array, (element) => element.age >= 21);

console.log(result);
// Output: [{ name: 'John', age: 25 }, { name: 'Joe', age: 32 }]

In the example above, the predicate function (element) => element.age >= 21 checks if the age of the element is greater than or equal to 21. If the condition is true, it returns true and the element is added to the result array.

Helpful links

• Lodash Documentation
• MDN Array Documentation

Edit this code on GitHub