How to Create Nested Arrays from a Nest of Arrays in JavaScript ? Last Updated : 07 Feb, 2024 Comments Improve Suggest changes Like Article Like Report Creating nested arrays from a nest of arrays in JavaScript involves organizing multiple arrays into a hierarchical structure, which is often useful for managing and representing complex data relationships. This process entails encapsulating arrays within other arrays to form multi-dimensional structures. Such nested arrays can represent various data structures, from simple lists of lists to more intricate tree-like structures. These are the following methods: Table of Content Using map() methodUsing reduce() methodUsing from() methodMethod 1: Using map() methodThis map method is used to iterate over the input arrays using map(), and for each array, creating a new array containing the original array as its only element. The push() method is then used to append each new array to a resulting array. Example: Creating the nested array from the given in arrays using the map method. JavaScript function createNestedArray(...arrays) { return arrays.map(array => [array]); } // Example usage: const arr1 = [1, 2, 3]; const arr2 = ['a', 'b', 'c']; const arr3 = [true, false]; const nestedArray = createNestedArray(arr1, arr2, arr3); console.log(nestedArray); Output[ [ [ 1, 2, 3 ] ], [ [ 'a', 'b', 'c' ] ], [ [ true, false ] ] ] Method 2: Using reduce() methodIn this approch, reduce() is used to iterate over the input arrays. For each array, a new array containing the original array as its only element is created and appended to the accumulating result array using push(). Example: Creating the nested array from the given in arrays using the reduce method. JavaScript function createNestedArray(...arrays) { return arrays.reduce((acc, curr) => { acc.push([curr]); return acc; }, []); } // Example usage: const arr1 = [1, 2, 3]; const arr2 = ['a', 'b', 'c']; const arr3 = [true, false]; const nestedArray = createNestedArray(arr1, arr2, arr3); console.log(nestedArray); Output[ [ [ 1, 2, 3 ] ], [ [ 'a', 'b', 'c' ] ], [ [ true, false ] ] ] Method 3: Using from() methodIn this method, from() is utilised to create a new array from the input arrays. A mapping function passed to from() constructs new arrays, with each original array nested within another array. This method offers a concise way to create nested arrays from existing arrays. Example: Creating the nested array from the given in arrays using the from method. JavaScript function createNestedArray(...arrays) { return Array.from(arrays, array => [array]); } // Example usage: const arr1 = [1, 2, 3]; const arr2 = ['a', 'b', 'c']; const arr3 = [true, false]; const nestedArray = createNestedArray(arr1, arr2, arr3); console.log(nestedArray); Output[ [ [ 1, 2, 3 ] ], [ [ 'a', 'b', 'c' ] ], [ [ true, false ] ] ] Comment More infoAdvertise with us Next Article How to Create Nested Arrays from a Nest of Arrays in JavaScript ? S strikeackr Follow Improve Article Tags : JavaScript Web Technologies Similar Reads How to Merge/Flatten an array of arrays in JavaScript ? Merging or flattening an array of arrays in JavaScript involves combining multiple nested arrays into a single-level array. 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