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Update stack min challenge (#128)

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Rename variable min_vals to stack_of_mins to improve clarity.
Rename method min to minimum to avoid using the same name as the built-in min.
This commit is contained in:
Donne Martin 2016-12-08 05:32:13 -05:00 committed by GitHub
parent 385bc54efa
commit 2399eb60d3
3 changed files with 33 additions and 33 deletions
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18
stacks_queues/stack_min/stack_min_challenge.ipynb
View File

@ -103,7 +103,7 @@
" # TODO: Implement me\n",
" pass\n",
"\n",
" def min(self):\n",
" def minimum(self):\n",
" # TODO: Implement me\n",
" pass\n",
"\n",
@ -146,26 +146,26 @@
" stack = StackMin()\n",
" stack.push(5)\n",
" assert_equal(stack.peek(), 5)\n",
" assert_equal(stack.min(), 5)\n",
" assert_equal(stack.minimum(), 5)\n",
" stack.push(1)\n",
" assert_equal(stack.peek(), 1)\n",
" assert_equal(stack.min(), 1)\n",
" assert_equal(stack.minimum(), 1)\n",
" stack.push(3)\n",
" assert_equal(stack.peek(), 3)\n",
" assert_equal(stack.min(), 1)\n",
" assert_equal(stack.minimum(), 1)\n",
" stack.push(0)\n",
" assert_equal(stack.peek(), 0)\n",
" assert_equal(stack.min(), 0)\n",
" assert_equal(stack.minimum(), 0)\n",
"\n",
" print('Test: Pop on non-empty stack')\n",
" assert_equal(stack.pop(), 0)\n",
" assert_equal(stack.min(), 1)\n",
" assert_equal(stack.minimum(), 1)\n",
" assert_equal(stack.pop(), 3)\n",
" assert_equal(stack.min(), 1)\n",
" assert_equal(stack.minimum(), 1)\n",
" assert_equal(stack.pop(), 1)\n",
" assert_equal(stack.min(), 5)\n",
" assert_equal(stack.minimum(), 5)\n",
" assert_equal(stack.pop(), 5)\n",
" assert_equal(stack.min(), sys.maxsize)\n",
" assert_equal(stack.minimum(), sys.maxsize)\n",
"\n",
" print('Test: Pop empty stack')\n",
" assert_equal(stack.pop(), None)\n",

32
stacks_queues/stack_min/stack_min_solution.ipynb
View File

@ -129,23 +129,23 @@
"\n",
" def __init__(self, top=None):\n",
" super(StackMin, self).__init__(top)\n",
" self.min_vals = Stack()\n",
" self.stack_of_mins = Stack()\n",
"\n",
" def min(self):\n",
" if self.min_vals.top is None:\n",
" def minimum(self):\n",
" if self.stack_of_mins.top is None:\n",
" return sys.maxsize\n",
" else:\n",
" return self.min_vals.peek()\n",
" return self.stack_of_mins.peek()\n",
"\n",
" def push(self, data):\n",
" super(StackMin, self).push(data)\n",
" if data < self.min():\n",
" self.min_vals.push(data)\n",
" if data < self.minimum():\n",
" self.stack_of_mins.push(data)\n",
"\n",
" def pop(self):\n",
" data = super(StackMin, self).pop()\n",
" if data == self.min():\n",
" self.min_vals.pop()\n",
" if data == self.minimum():\n",
" self.stack_of_mins.pop()\n",
" return data"
]
},
@ -184,26 +184,26 @@
" stack = StackMin()\n",
" stack.push(5)\n",
" assert_equal(stack.peek(), 5)\n",
" assert_equal(stack.min(), 5)\n",
" assert_equal(stack.minimum(), 5)\n",
" stack.push(1)\n",
" assert_equal(stack.peek(), 1)\n",
" assert_equal(stack.min(), 1)\n",
" assert_equal(stack.minimum(), 1)\n",
" stack.push(3)\n",
" assert_equal(stack.peek(), 3)\n",
" assert_equal(stack.min(), 1)\n",
" assert_equal(stack.minimum(), 1)\n",
" stack.push(0)\n",
" assert_equal(stack.peek(), 0)\n",
" assert_equal(stack.min(), 0)\n",
" assert_equal(stack.minimum(), 0)\n",
"\n",
" print('Test: Pop on non-empty stack')\n",
" assert_equal(stack.pop(), 0)\n",
" assert_equal(stack.min(), 1)\n",
" assert_equal(stack.minimum(), 1)\n",
" assert_equal(stack.pop(), 3)\n",
" assert_equal(stack.min(), 1)\n",
" assert_equal(stack.minimum(), 1)\n",
" assert_equal(stack.pop(), 1)\n",
" assert_equal(stack.min(), 5)\n",
" assert_equal(stack.minimum(), 5)\n",
" assert_equal(stack.pop(), 5)\n",
" assert_equal(stack.min(), sys.maxsize)\n",
" assert_equal(stack.minimum(), sys.maxsize)\n",
"\n",
" print('Test: Pop empty stack')\n",
" assert_equal(stack.pop(), None)\n",

16
stacks_queues/stack_min/test_stack_min.py
View File

@ -8,26 +8,26 @@ class TestStackMin(object):
stack = StackMin()
stack.push(5)
assert_equal(stack.peek(), 5)
assert_equal(stack.min(), 5)
assert_equal(stack.minimum(), 5)
stack.push(1)
assert_equal(stack.peek(), 1)
assert_equal(stack.min(), 1)
assert_equal(stack.minimum(), 1)
stack.push(3)
assert_equal(stack.peek(), 3)
assert_equal(stack.min(), 1)
assert_equal(stack.minimum(), 1)
stack.push(0)
assert_equal(stack.peek(), 0)
assert_equal(stack.min(), 0)
assert_equal(stack.minimum(), 0)
print('Test: Pop on non-empty stack')
assert_equal(stack.pop(), 0)
assert_equal(stack.min(), 1)
assert_equal(stack.minimum(), 1)
assert_equal(stack.pop(), 3)
assert_equal(stack.min(), 1)
assert_equal(stack.minimum(), 1)
assert_equal(stack.pop(), 1)
assert_equal(stack.min(), 5)
assert_equal(stack.minimum(), 5)
assert_equal(stack.pop(), 5)
assert_equal(stack.min(), sys.maxsize)
assert_equal(stack.minimum(), sys.maxsize)
print('Test: Pop empty stack')
assert_equal(stack.pop(), None)