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Lodash _.unzip

Overview

The lodash _.unzip method is a utility function that is used to transpose a matrix of nested arrays. It returns a new array composed of arrays generated from the input arrays, where the first array contains all the first elements from each input array, the second array contains all the second elements from each input array, and so on.

Example usage:

const arr = [['a', 1], ['b', 2], ['c', 3]];
const transposed = _.unzip(arr);
// transposed -> [['a', 'b', 'c'], [1, 2, 3]]

The _.unzip method can also be used with an array of objects, where the resulting arrays will contain the values of a specified key.

Example usage:

const arr = [{name: 'Alice', age: 25}, {name: 'Bob', age: 30}, {name: 'Charlie', age: 35}];
const transposed = _.unzip(_.map(arr, _.values));
// transposed -> [['Alice', 'Bob', 'Charlie'], [25, 30, 35]]

One important aspect of this method is that it assumes that all of the input arrays have the same length. If an input array is shorter than the others, the missing values will be filled with undefined in the resulting array.

_.unzip can be a useful tool for data manipulation and can aid in simplifying complex code.