arrayDeletion.rb

arr = [5, 6, 5, 4, 3, 1, 2, 5, 4, 3, 3, 3] 
# Delete an element from the end of the array
 arr.pop
#  => 3

# Delete an element from the beginning of the array
arr.shift
#  => 5

# Delete an element at a given position
 arr.delete_at(2)

 #  => 4
# Delete all occurrences of a given element
arr.delete(5)
#  => 5

# arr
#  => [6, 3, 1, 2, 4, 3, 3]

#solution
def end_arr_delete(arr)
  # delete the element from the end of the array and return the deleted element
  arr.pop
end

def start_arr_delete(arr)
  # delete the element at the beginning of the array and return the deleted element
  arr.shift
end

def delete_at_arr(arr, index)
  # delete the element at the position #index
  arr.delete_at(index)
end

def delete_all(arr, val)
  # delete all the elements of the array where element = val
  arr.delete(val)
end