merge.js

/**
  Given two sorted arrays, merge them into one big sorted array
  Ex:
  merge([1,3,5],[2,4,6])
  returns [1,2,3,4,5,6]
  You cannot use array.sort().
  
  Try to solve this in O(n+m) runtime.
  Where n is the length of the first array
  and m is the length of the second array.
*/
function merge(arr1, arr2){

}