Ruby中的循环分配

Question

我有Enquiry和Consellor个型号。我想以循环方式向辅导员分配咨询。如果有3个consellors和5个查询，那么作业应该是：

  

查询1 =＆gt; C1，询问2 =＆gt; C2，询问3 =＆gt; C3，询问4 =＆gt; C1，   询问5 =＆gt; C2

我可以通过查询数据库并通过缓存进行优化来实现这一目标，但寻找更好的解决方案。

Answer 1

Array＃cycle（无限枚举器）很适合：

counselors = %w(C1 C2 C3).cycle
enquiries = Array.new(5){|i| "Enquiry #{(i+1).to_s}"}
enquiries.each{|enq| puts "Do something with #{enq} and #{counselors.next}."}

输出

Do something with Enquiry 1 and C1.
Do something with Enquiry 2 and C2.
Do something with Enquiry 3 and C3.
Do something with Enquiry 4 and C1.
Do something with Enquiry 5 and C2.