JavaScript’s arrays can hold heterogeneous ... modifying the collection in a “destructive” way: // Create an array with heterogeneous types: let myArray = [10, "hello", true, { name ...

JavaScript arrays are resizable and can contain a mix of different data types. JavaScript array-copy operations create shallow copies ( meaning that a new array or object is created, but the elements ...

Unlike in Harry's world, we can't simply cast Scourgify. Luckily we are programmers and we can invoke the magic of JavaScript! Create a function that receives the messy birthday array and returns a ...