ruby-on-rails - 在 Ruby on Rails 中正确使用 REJECT 方法——帮助我将多行代码转换为 Ruby 单行代码

Question

我有一个哈希名称和电子邮件的数组，如下所示:

array = [{"email"=>"test@test.com", "name"=>"Test"},
      {"email"=>"testA@gmail.com", "name"=>"Test A"},
      {"name"=>"Test B", "email"=>"testB@test.com"},
      {"email"=>"testC@yahoo.com", "name"=>"Test C"},
      {"name"=>"Test D", "email"=>"testD@hotmail.com"},
      {"email"=>"testE@test.com"},
      {"name"=>"Test F", "email"=>"testF@test.com"}]

我想过滤掉“黑名单”数组中的某些电子邮件。下面的工作，但它太冗长了。

 blacklist = ["@test.com", "@gmail.com"] 
 na = array
 blacklist.each do |b|
   na = na.reject{ |e| e["email"].include?(b) }
 end

 # na => [{"email"=>"testC@yahoo.com", "name"=>"Test C"}, {"name"=>"Test D", "email"=>"testD@hotmail.com"}]

有人可以帮助我将它放入性感的 Ruby 单行代码中吗？

Answer 1

还有一个建议:)

array.reject { |h| blacklist.any? { |b| h["email"].include? b } }