Last Updated : 23 Jul, 2025
Lodash is a JavaScript library that works on the top of underscore.js. Lodash helps in working with arrays, strings, objects, numbers, etc. It provides us with various inbuilt functions and uses a functional programming approach which makes coding in javascript easier to understand because instead of writing repetitive functions, tasks can be accomplished with a single line of code.
Lodash Methods
Description
_.countBy() It creates an object composed of keys generated from the results of running each element of collection through iteratee. _.every() It checks if the predicate returns true for all elements of collection and iteration is stopped once the predicate returns falsely. _.filter() It iterates over elements of collection, returning an array of all elements predicate returns true. _.find() It access each value of the collection and returns the first element that passes a truth test for the predicate. _.findLast() It iterates over the elements in a collection from the right to the left. _.flatMap() It creates a flattened array of values by running each element in collection through iteratee and flattens the mapped results. _.flatMapDeep() It creates a flattened array of values by running each element in collection through iteratee and flattens the mapped results. _.flatMapDepth() It creates a flattened array of values by running each element in collection through iteratee and flattens the mapped results up to the given depth value. _.forEach() It iterates over elements of collection and invokes iteratee for each element. _.forEachRight() It iterates over elements of collection from right to left. _.groupBy() It creates an object composed of keys generated from the results of running each element of collection through iteratee. _.includes() It is used to find the value is in the collection or not. _.invokeMap() It invokes the method at the given path of each element in the collection and returns an array of the results of each invoked method. _.keyBy() It creates an object that composed of keys generated from the results of running an each element of collection through iteratee. _.map() It creates an array of values by running each element in collection through the iteratee. _.orderBy() It allows the sort orders of the iterates to sort by. _.partition() It creates an array of elements split into two groups. _.reduce() It reduces collection to value which is accumulated result of running each element in the collection through iteratee. _.reduceRight() It iterates over elements of collection from right to left. _.reject() This method returns elements of the collection that predicate does not return true. _.sample() It will provide a random element from collection. _.sampleSize() is used to give an array of n random elements from the given array. _.shuffle() It creates an array of shuffled values from the given collection using a version of the Fisher-Yates shuffle algorithm. _.size() It gets the size of collection by returning its length for array such as values. _.some() It is used to check if predicate return true for any element of collection. _.sortBy() It creates an array of elements which is sorted in ascending order by the results of running each element in a collection through iteratee.RetroSearch is an open source project built by @garambo | Open a GitHub Issue
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