Other methods like concat, map, and filter create a copy of the array ... As an example, this is what happens when you reverse an array. const languages = ["JavaScript", "TypeScript", "CoffeeScript"]; ...

When the concat method is called with zero or more arguments, // it returns an array containing the array elements of the // object followed by the array elements of each argument in order. // Arrays ...

Concatenation means to join items end to end. JavaScript offers the concat method for both strings and arrays that work in the same way. For arrays, the method is called on one, then another array is ...