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Lodash _.map

Overview

The lodash _.map() method is a popular function used in JavaScript programming to transform collections. It is part of the popular Lodash utility library and provides an easy way to iterate over an array or object executing a function for each value and returning a new array of the results.

The _.map() method accepts two parameters: the collection to iterate over and the function to be executed on each value. This function accepts three arguments: the current value in the iteration, its index, and the whole collection. The return value of this function is added to the result array.

Here’s an example of how to use the _.map() method:

const numbers = [1, 2, 3, 4];
const squares = _.map(numbers, (num) => {
  return num * num;
});

console.log(squares); // [1, 4, 9, 16]

In the example above, _.map() is used to iterate over the numbers array and apply a function to each value. The result is then stored in the squares array.

One of the benefits of using the _.map() method is that it can help make code more readable and concise. It can also help reduce boilerplate code by avoiding explicit loops, and can make it easier to work with collections of data in JavaScript.

Overall, the _.map() method is a powerful and flexible tool for transforming collections of data in JavaScript. Its ease of use makes it a popular choice for developers looking to work with complex data structures in a concise and efficient way.