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Lodash _.spread

Overview

The lodash _.spread method is a built-in utility function that takes a function as its argument and returns a new function that can be used to spread the arguments received by that function.

This method is useful when you have an array of arguments that you want to pass to a function that does not accept an array as its input. With _.spread, you can easily specify which items in the array should be used as arguments when calling the function.

The syntax for using _.spread is as follows:

_.spread(func)

Here, func is the function that you want to spread arguments to. The returned function takes an array of arguments and spreads them out as individual arguments when calling func.

For example, let's say we have a function sum that accepts three arguments:

function sum(a, b, c) {
  return a + b + c;
}

If we have an array of three numbers, we can pass them to sum using _.spread like this:

const numbers = [1, 2, 3];
const result = _.spread(sum)(numbers);
console.log(result); // Output: 6

In this example, we first define an array numbers with three numbers. We then call _.spread(sum) to get a new function that will spread out any array argument passed to it when calling sum. Finally, we pass numbers to the new function, which spreads its three values as individual arguments when calling sum. The result is the sum of the three numbers (1 + 2 + 3 = 6).

_.spread can also be used with functions that accept arguments of different types, such as a combination of strings and numbers, booleans and objects.

In summary, _.spread is a powerful utility function that allows you to spread out array arguments when calling a function. This makes it easy to use functions in ways that are not natively supported, and enables you to write cleaner, more readable code.