Why won't this Ruby each loop break?

I have the following code in one of my personal projects:

def allocate(var, value) # Allocate the variable to the next available spot. 
  @storage.each do |mem_loc|
    if mem_loc.free?
      mem_loc.set(var, value) # Set it then break out of the loop.
      break
    end
  end
end

Each item in the storage array is an object that responds to free? and set. What I am trying to do is cycle through the array, looking for the next free (empty) object to set the variable to. My problem is, this just cycles through every object and开发者_JAVA百科 sets them all. Am I using the break function incorrectly?

Testing it, I call the following:

store.allocate(:a, 10)
store.allocate(:b, 20)

So store[1] should be set to :b and 20. But when I output the contents, it's value is 10, as is the rest of the array.

I believe I have found the mistake, and it wasn't actually in the code above. When I set up the storage array, I did like so:

@storage = [Memory_location.new] * 1000

Believing it would create 1000 different objects. What I think actually happened, was that it created 1000 references to the same object, so when I changed one of them, I changed all of them. I could prove this by using the puts method on two different array locations, with both of them returning:

#{Memory_location:0x2bc8b74}