ruby-on-rails - 如何在Rails 3中获取数组元素

我在Rails3中有一个类似这样的数组[["SWD", "150325006"], ["GOODS", "150325006"]]。我想得到那些类型为“SWD”的数字。请检查下面的代码。
支付控制器.rb

class PaymentsController < ApplicationController

    def payment
        @payment=Vendor.new
        respond_to do |format|
            format.html
            format.js
        end

    end
    def check_type
        if params[:commit]=="submit"
            @vendor_type = PaymentVendor.where(:v_name => params[:v_name]).map{|v|[v.v_catagory ,v.Receipt_No]}
            #@vendor_type = PaymentVendor.where(:v_name => params[:v_name]).pluck(:v_catagory)


        else
            @v_name=Vendor.where(:s_catagory => params[:payment][:s_catagory] ).pluck(:v_name)
        end
    end
end

@vendor_type给出的值是这样的[["SWD", "150325006"], ["GOODS", "150325006"]]请帮帮我。

最佳答案

@vendor_type = [["SWD", "150325006"], ["GOODS", "150325006"],["GOODS", "150325006sdfs"],["SWD", "150325006sdff"]]

output = []
@vendor_type.each do |i|
   if i.first == "SWD"
      output << i[1]
   end
end
puts output

关于ruby-on-rails - 如何在Rails 3中获取数组元素，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/29916935/