摘要： 解决http://askubuntu.com/questions/339702/network-service-discovery-disabled-what-does-this-mean-for-me/339709#339709To disable it, you must edit the fi... 阅读全文

摘要： reject和reject!reject返回不满足代码块的元素数组reject！删除数组中满足代码块的元素a=[1,2,3,5]a.reject! {|x| x4}p cp b[1, 2, 3, 4][1, 2, 3, 4, 5] 阅读全文