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Finding the lowest value within an instance variable

def show_cheapest_item(self):
    """ (ShoppingCart) -> int
    Return the cheapest item in the cart, or -1 if
no items are in the cart
    if len(self.cart) == 0:
        return -1
    cheapest_item = self.cart[0]
    for item in self.cart[1:]:
        if item.price < cheapest_item.price:
            cheapest_item = item
    return cheapest_item

Categories : Python

Related to : Finding the lowest value within an instance variable
Finding the lowest value in dictionary
The problem in your code is that you initialize lowest to 0. If all your cities have positive temperatures, lowest will never change when you compute the min, and no city will ever satisfy the if city[key] == lowest: test. A way to fix this is to initialize lowest to one of the temperatures of the cities. For example you could add: lowest = temperature below if user == "stop": to initialize

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how to access an instance of a class from its instance variable
You must create new object from instance A A aa = new A(); OR public class B extends A { public B() { // need to access A } }

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Java : performance of the instance without variable
Test.getInstance().firstMethod() Test.getInstance().secondMethod() Test.getInstance().thirdMethod() This will create three different instances of the Test class and call a method on each. Test test = Test.getInstance(); test.firstMethod(); test.secondMethod(); test.thirdMethod(); Will create only one instance and invoke the three methods on that instance. So it's a completely different behav

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Best Way to initialize a instance variable in Rails
If you really dont want to use after_initialize, create the variable on the fly: attr_writer :test def testing self.test += 1 end def test @test ||= 0 end

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Instance variable in Rails helper not set
Try using deep_merge!: def add_meta_tag_options(opt) meta_options.deep_merge!(opt) end

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