Sometimes, we want to generate all combinations of elements in a single array in pairs with JavaScript.
In this article, we’ll look at how to generate all combinations of elements in a single array in pairs with JavaScript.
How to generate all combinations of elements in a single array in pairs with JavaScript?
To generate all combinations of elements in a single array in pairs with JavaScript, we use the array map and flatMap methods.
For instance, we write
const array = ["apple", "banana", "lemon", "mango"];
const result = array.flatMap((v, i) =>
array.slice(i + 1).map((w) => v + " " + w)
);
console.log(result);
to call slice and map to create all the strings with 2 of the items in array in each string separated by a space.
Then we call flatMap to combine the nested arrays into one flat array.
Conclusion
To generate all combinations of elements in a single array in pairs with JavaScript, we use the array map and flatMap methods.
