lodash.uniqby
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Package description
The lodash.uniqby package is a part of the Lodash library, specifically designed for creating arrays with unique elements based on a specified criterion. It allows for filtering out duplicate values in an array by comparing the result of running each element through an iteratee function. This is particularly useful for dealing with arrays of objects where uniqueness should be determined based on specific properties.
Removing duplicate objects based on a specific property
This feature allows for the removal of duplicate objects from an array based on a specific property. In this example, the array of objects is filtered to ensure uniqueness based on the 'id' property.
[{ 'id': 1, 'name': 'John' }, { 'id': 2, 'name': 'Doe' }, { 'id': 1, 'name': 'John' }].filter((v, i, a) => a.findIndex(t => (t.id === v.id)) === i)Underscore is a utility library with similar functionalities to lodash, including methods for working with arrays, objects, and functions. It offers a 'uniq' method that can be used similarly to 'uniqBy' for arrays of primitive types but lacks the direct equivalent of specifying an iteratee for complex uniqueness conditions.
Ramda is a functional programming library that includes a 'uniqBy' function, which works similarly to lodash.uniqby. It emphasizes a more functional programming approach, which might be preferred by developers looking for composability and immutability. Ramda's 'uniqBy' also removes duplicates based on the provided iteratee function.
Readme
The lodash method _.uniqBy exported as a Node.js module.
Using npm:
$ {sudo -H} npm i -g npm
$ npm i --save lodash.uniqby
In Node.js:
var uniqBy = require('lodash.uniqby');
See the documentation or package source for more details.
FAQs
The lodash method `_.uniqBy` exported as a module.
The npm package lodash.uniqby receives a total of 1,663,507 weekly downloads. As such, lodash.uniqby popularity was classified as popular.
We found that lodash.uniqby demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 3 open source maintainers collaborating on the project.
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