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Lodash _.last


The lodash _.last() method is a utility method in JavaScript that allows developers to retrieve the last element of an array. This method works with arrays, strings, and objects, and it can be used with both mutable and immutable data structures.

The syntax for _.last() is simple: _.last(collection), where collection is the JavaScript array, string, or object containing the elements to retrieve. If collection is an array, _.last() will return the last element in the array. Similarly, if collection is a string, _.last() will return the last character in the string. If collection is an object, _.last() will return the value of the last property in the object.

It’s important to note that _.last() does not modify the original collection. Instead, it returns a new array, string, or value.

One of the key features of the _.last() method is that it can accept an optional n parameter that allows developers to retrieve the last n elements of a collection. For example, _.last([1, 2, 3, 4], 2) will return [3, 4], which are the last two elements of the array.

Another benefit of _.last() is that it can be used with a method chaining syntax for readability and conciseness. For example, _.chain(users).map('name').sortBy().last().value() will return the name of the user with the last name alphabetically.

In summary, the _.last() method is a powerful and flexible utility method that can be used to retrieve the last element(s) of a collection in JavaScript. Its ability to work with arrays, strings, and objects, as well as its support for method chaining, makes it a popular choice for developers who require a reliable and efficient way to access the last element(s) of their data.