The result of such sequences must be unwrapped with _#value. Taken from lodash’s documentation website. We’ll look at two scenarios using features such as find and reduce. Lodash is a JavaScript library that works on the top of underscore.js. So why shouldn’t you use lodash? Let’s create a method to sort arrays being able to arrange objects by some property. Because performance really matters for a good user experience, and lodash is an outsider here. Lodash helps in working with arrays, collection, strings, objects, numbers etc. Creates a lodash wrapper instance that wraps value with explicit method chain sequences enabled. value (*): The value to wrap. Here are two main issues. The team made an early decision in favor of flow.. Returns (Object): Returns the new lodash wrapper instance. compose is often the classic tool for people coming from an FP background as it reads in the same way as the manual composition, but flow reads sequentially left to right and is, therefore, the first choice of all other people. The _.sortBy() method creates an array of elements which is sorted in ascending order by the results of running each element in a collection through each iteratee. It can handle robust data manipulations with ease. But for now we are going to try this approach Gist: sortBy-old.js. I used the Lodash docs to create the solution below however .orderBy doesn't seem to be having any affect at all. Is there some handy way of defining direction per column? 1.3.0. E.g. _.orderBy(collection, [iteratees=[_.identity]], [orders]) This method is like _.sortBy except that it allows specifying the sort orders of the iteratees to sort by. library and beyond) to use reversed functional composition. And compare them with JavaScript analogues. @qiansen1386 Can't comment on "Ramda vs Lodash" (I am familiar with Lodash, but not so much with Ramda), but in Haskell (FP beast) I see it is common to use fn composition and actually prefer it even thought there are possibilities (in std. It also reads the same way as a promise chain. sortBy on an array containing both strings and numbers gives strange results: _.sortBy([6,5,4,"hi",3,2,1]) [1, 4, 5, 6, "hi", 2, 3] I think this happens because comparison between a number and a string will coerce the string into NaN, which is neither greater than nor less than any other number: In native javaScript there is the array sort method that can also be used when it comes to not using lodash as part of a … To read more about the library, explore the methods see the Lodash documentation. Since. We are using it in an Angular 2 application. If orders is unspecified, all values are sorted in ascending order. So the lodash order by method is another option on top of the lodash _.sortBy method whe it comes to sorting object collections in general both with arrays, and objects in general. I recommend GitHub: Array sortBy – a best implementation of sortBy method which uses the Schwartzian transform. Speed. In light of this I tend to think it is just a matter of taste/habit which approach to use. The first and most important thing is speed. Lodash works great with Node.js. Arguments. You can also specify the option in either of the following forms: Example Questions: There’s a nifty method to sort an array of object based on several propertes: var data = _.sortBy(array_of_objects, ['type', 'name']); However that is only for ascending sorting. 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