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Lodash _.thru

Overview

The lodash _.thru method is a function that is used to pass the input to a given function and returns the same input object. This method can be used to chain multiple lodash methods in a single chain.

The _.thru method is typically used to modify or transform data before passing it to another method. For example, you could use _.thru to modify a string, then pass it to a _.map method.

Here's an example of how to use the _.thru method:

const result = _.chain([1, 2, 3])
  .thru(array => array.map(n => n * 2))
  .map(n => n + 1)
  .value();

console.log(result); // Output: [ 3, 5, 7 ]

In the above example, we first pass the input [1, 2, 3] to a function that maps each element in the array to its double using the array.map method. The resulting array is then passed to the _.map method, which adds 1 to each element in the array.

The _.thru method is used to ensure that the modified array is passed to the _.map method for further processing.

The _.thru method is often used in conjunction with other lodash methods like _.map, _.filter, and _.reduce. By chaining these methods together using _.thru, you can create powerful data transformations in a simple and concise way.

To summarize, the _.thru method is a utility method in lodash that allows you to modify data before passing it to another method in the same chain. It is a powerful tool for creating complex data transformations with ease.