ruby-on-rails - Ruby On Rails迭代器.each block 错误

Question

我有此代码捕获的异常，我无法查明错误。

  def paypal_content
    payment = {}
    payment[:intent] = "sale"
    payment[:payer] = { :payment_method => "paypal" }
    payment[:redirect_urls] = { :return_url => "http://localhost:3000/payment/execute", :cancel_url => "http://localhost:3000"}

    items = []
    index = 0
    @cart.items.each do |item|
       items[index] = {}
       items[index][:name] = item.title
       items[index][:sku] = item.artist
       items[index][:price] = item.price.to_s
       items[index][:quantity] = "1"
       items[index][:currency] = "CHF"
       index++      
    end  <--- this is line 109

    item_list = {}
    item_list[:items] = items

    transactions = []
    transactions[0] = {}
    transactions[0][:item_list] = item_list
    transactions[0][:amount] = { :total => @cart.total_price.to_s, :currency => "CHF"}
    transactions[0][:description] = "from Larraby Blaine Esquire"

    payment[:transactions] = transactions

    return payment
  end

错误是
home_controller.rb:109语法错误，意外的keyword_end
home_controller.rb:125:语法错误，意外的$ end，期望keyword_end

如果我删除每个块，一切都很好，那么我想我在该块上犯了一个错误，但是是什么错误？

Answer 1

Ruby不知道++，写+= 1。

当您编写index++时，它会认为第一个+是加法，而第二个+是一元符号。后面没有东西就不能有一个标志，因此它需要一个表达式，但是会找到end。