ruby入门_for_in

针对数组和哈希表

看例子就可以了

people1 = ["Tom", "Marry", "Jack", "Kay"]people2 = {"Tom"=>23, "Marry"=>22, "Jack"=>25, "Kay"=>20}# ------------------------for person in people1  puts personend# ------------------------for personInfo in people2  # puts "name #{personInfo[0]} age #{personInfo[1]}"  puts personInfo[0] + " : " + personInfo[1].to_send# ------------------------for name, age in people2  # puts "name #{name} age #{age}"  puts name + " : " + age.to_send

输出

Tom
Marry
Jack
Kay
Tom : 23
Kay : 20
Jack : 25
Marry : 22
Tom : 23
Kay : 20
Jack : 25
Marry : 22