# [Ruby 块]=begin1 块由大量代码构成2 块中代码包含在{}内3 从与其相同名称的函数调用4 可以使用yield语句调用块=enddef test p '在test方法内' yield p '又回到了test方法内' yieldend test {p '你在块内'}#也可以传递由参数的yielddef test yield 5 p '在方法内' yield 100endtest {|i| p "你在块#{i}内"} # 传递多个参数def test yield 5,100
安装cocoapods,记录两个问题! 1.镜像已经替换成了 http://ruby.taobao.org/, 还是不能不能安装cocoapods, 报错:Unable to download data from http://ruby.taobao.org/ - bad response Not Found 404 (http://ruby.taobao.org/latest_specs.4.8.gz) 如图: 原来是ruby.taobao.org已经停止基于 HTTP 协议的镜像服务, 启用
The most interesting addition to Ruby 2.3.0 is the Safe Navigation Operator(&.). A similar operator has been present in C# and Groovy for a long time with a slightly different syntax - ?.. So what does it do? Scenario Imagine you have an account that
当一个类拥有可以从多个父类继承的特点,类应该显示多重继承. Ruby没有直接支持多继承,但Ruby模块有另一个精彩使用.他们几乎消除多重继承的需要,提供了一个工厂,称为混入. 混合类型给一个精彩的控制方式增加功能类.在代码中混合类,使用它的代码能进行交互. 语法: module A def a1 end def a2 end end modlue B def b1 end def b2 end end class Sample include A include B def s1 end end