Lodash _.reduceRight() Method
Last Updated :
13 Nov, 2023
Lodash _.reduceRight() method is similar to _.reduce() method except that it iterates over elements of collection from right to left.
Syntax:
_.reduceRight(collection, iteratee, accumulator)
Parameters:
This method accepts three parameters as mentioned above and described below:
- collection: This parameter holds the collection to iterate over.
- iteratee: This parameter holds the function invoked per iteration.
- accumulator: This parameter holds the initial value.
Return Value:
This method returns the accumulated value.
Example 1: This code uses the Lodash library to flatten a nested array by iterating from right to left and concatenating subarrays using the _.reduceRight()
method.
Here, const _ = require(‘lodash’) is used to import the lodash library in the file.
javascript
const _ = require("lodash");
var array = [[10, 11], [12, 13], [14, 15]];
let gfg = _.reduceRight(array,
function (flattened, other) {
return flattened.concat(other);
}, []);
console.log(gfg);
|
Output:
[ 14, 15, 12, 13, 10, 11 ]
Example 2: In this example, the code requires the Lodash library and uses the _.reduceRight
method to flatten a nested array and then displays the flattened result in the console.
javascript
const _ = require("lodash");
let array = [[ 'C++' , 'C#' ],
[ 'DAA' , 'Java' ], [ 'Lodash' , 'Python' ]];
let gfg = _.reduceRight(array,
function (flattened, other) {
return flattened.concat(other);
}, []);
console.log(gfg);
|
Output:
[ 'Lodash', 'Python', 'DAA', 'Java', 'C++', 'C#' ]
Note:
This code will not work in normal JavaScript because it requires the library lodash to be installed.
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