javascript-lodashHow can I use Lodash's reject function in JavaScript?
The reject
function in Lodash is used to filter out items in an array that meet certain criteria. It takes an array and a predicate (function that returns true or false) as arguments and returns a new array with the items that do not meet the criteria.
For example:
const _ = require('lodash');
const numbers = [1, 2, 3, 4, 5];
const oddNumbers = _.reject(numbers, (num) => {
return num % 2 === 0;
});
console.log(oddNumbers);
// Output: [1, 3, 5]
In the example above, _.reject
takes an array of numbers, and a predicate that checks if the number is even. The reject
function then returns a new array with all the odd numbers from the original array.
The parts of the example above are:
const _ = require('lodash');
- This imports the Lodash library.const numbers = [1, 2, 3, 4, 5];
- This is the original array of numbers.const oddNumbers = _.reject(numbers, (num) => {
- This is the call to thereject
function, which takes two arguments - the array and a predicate.return num % 2 === 0;
- This is the predicate, which checks if the number is even.console.log(oddNumbers);
- This prints out the new array with all the odd numbers.
For more information about Lodash's reject
function, see the official documentation.
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