我有两阵.。
array_of_structs1
array_of_structs2
构造类从环境角度考虑:
class Leader < Struct.new(:rank, :user); end
我想从array_of_structs1上删除重复用户。
任何援助都将受到高度赞赏。
我不敢理解。 如果你想要拆除在使用_struct1阵列中具有相同用户的重复装置:
array_of_structs1 = Hash[*array_of_structs1.map {|obj| [obj.user, obj]}.flatten].values
如果您放弃从阵列1中删除第2阵列中的条目,则使用
array_of_structs1 = array_of_structs1 - array_of_struct2
collection_select and select Rails helpers: Which one should I use? I can t see a difference in both ways. Both helpers take a collection and generates options tags inside a select tag. Is there a ...
We ve deployed our rails app to EC2. In our setup, we have two proxies on small instances behind round-robin DNS. These run nginx load balancers for a dynamically growing and shrinking farm of web ...
As part of a web application I need an auth-code to pass as a URL parameter. I am currently using (in Rails) : Digest::SHA1.hexdigest((object_id + rand(255)).to_s) Which provides long strings like : ...
I ve installed RubyCAS-Client version 2.1.0 as a plugin within a rails app. It s working, but I d like to remove the ?ticket= in the url. Is this possible?
I have a these 3 models: class User < ActiveRecord::Base has_many :permissions, :dependent => :destroy has_many :roles, :through => :permissions end class Permission < ActiveRecord::...
I m building an xml document from a hash. The xml attributes need to be in order. How can this be accomplished? hash.to_xml
guys which text editor is good for Rubyonrails? i m using Windows and i was using E-Texteditor but its not free n its expired now can anyone plese tell me any free texteditor? n which one is best an ...
I’m developing an application dedicated to generate statistical reports, I would like that user after saving their stat report they save sql queries too. To do that I wrote the following module: ...