This method is like sortedIndex except that it returns the highest
index at which value should be inserted into array in order to
maintain its sort order.
Parameters
array: any[]
The sorted array to inspect.
value: any
The value to evaluate.
Returns number
Returns the index at which value should be inserted
into array.
This method is like
sortedIndexexcept that it returns the highest index at whichvalueshould be inserted intoarrayin order to maintain its sort order.