下载还是很快的 Abstract base class for comparison tags. ConditionalTagBase Abstract base class for the various conditional evaluation tags. EmptyTag Evalute the nested body content of this tag if the specified value is empty for this request. EqualTag Eval
1 Introduction 1 1.1 What is this book? 1 1.2 But why? 2 1.3 Who am I? 2 1.4 Who are you? 3 1.5 So what will you read about? 3 1.6 A brief history of games 4 1.6.1 The time that land forgot 4 1.6.2 It’s all academic 6 1.6.3 My! Hasn’t he grown? 7 1.
给定一个对象数组：
class Company
attr_accessor :name, :size
def initialize(name, size)
name = name
size = size
end
end
companies = [
Company.new('Alpha', 30),
Company.new('Beta', 300),
Company.new('Delta', 3000)
]
使用ap
