Here is how to do this as of Typescript 2.0: (tsd and typings are being deprecated in favor of the following): $ npm install –save lodash # This is the new bit here: $ npm install –save-dev @types/lodash Then, in your .ts file: Either: import * as _ from “lodash”; Or (as suggested by @Naitik): … Read more
Ah-ha! The Lodash Changelog says it all… “Removed _.pluck in favor of _.map with iteratee shorthand” var objects = [{ ‘a’: 1 }, { ‘a’: 2 }]; // in 3.10.1 _.pluck(objects, ‘a’); // → [1, 2] _.map(objects, ‘a’); // → [1, 2] // in 4.0.0 _.map(objects, ‘a’); // → [1, 2]
_.unique no longer works for the current version of Lodash as version 4.0.0 has this breaking change. The functionality of _.unique was splitted into _.uniq, _.sortedUniq, _.sortedUniqBy, and _.uniqBy. You could use _.uniqBy like this: _.uniqBy(data, function (e) { return e.id; }); …or like this: _.uniqBy(data, ‘id’); Documentation: https://lodash.com/docs#uniqBy For older versions of Lodash (< … Read more
Here is a React Hooks specific solution for Error Warning: Can’t perform a React state update on an unmounted component. Solution You can declare let isMounted = true inside useEffect, which will be changed in the cleanup callback, as soon as the component is unmounted. Before state updates, you now check this variable conditionally: useEffect(() … Read more
An easy and elegant solution is to use _.isEqual, which performs a deep comparison: var a = {}; var b = {}; a.prop1 = 2; a.prop2 = { prop3: 2 }; b.prop1 = 2; b.prop2 = { prop3: 3 }; console.log(_.isEqual(a, b)); // returns false if different <script src=”https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js”></script> However, this solution doesn’t show which … Read more
Here’s how extend/assign works: For each property in source, copy its value as-is to destination. if property values themselves are objects, there is no recursive traversal of their properties. Entire object would be taken from source and set in to destination. Here’s how merge works: For each property in source, check if that property is … Read more
I created Lodash to provide more consistent cross-environment iteration support for arrays, strings, objects, and arguments objects1. It has since become a superset of Underscore.js, providing more consistent API behavior, more features (like AMD support, deep clone, and deep merge), more thorough documentation and unit tests (tests which run in Node.js, RingoJS, Rhino, Narwhal, PhantomJS, … Read more