nonMutatingSort.js

// *** Functional Programming: Return a Sorted Array Without Changing the Original Array ***

// A side effect of the sort method is that it changes the order of the elements 
// in the original array. In other words, it mutates the array in place. One way to 
// avoid this is to first concatenate an empty array to the one being sorted (remember 
// that concat returns a new array), then run the sort method.

// Use the sort method in the nonMutatingSort function to sort the elements of an
// array in ascending order. The function should return a new array, and not mutate
//  the globalArray variable.

var globalArray = [5, 6, 3, 2, 9];
function nonMutatingSort(arr) {
  // Add your code below this line
  
  return arr.concat().sort();
  
  // Add your code above this line
}
nonMutatingSort(globalArray);