按键获取数组元素

Question

这是我的 app.rb:

require 'sinatra'
COMICS = [
  {
    'name' => 'Test #1',
    'code' => 'Link №1'
    },
  {
    'name' => 'Test #2',
    'code' => 'Test №2'
    },
  {
    'name' => 'Test #3',
    'code' => 'Test №3'
    },
  {
    'name' => 'Test #4',
    'code' => 'Test №4'
    }
  ]
get '/' do
  erb :index, :locals => { :comics => COMICS }
end

get '/single/:key' do
  comic = COMICS[params['key']]
  erb :single, :locals => { :comic => comic }
end

但是当我尝试访问时：例如 /single/0 我收到以下错误：

TypeError at /single/1

no implicit conversion of String into Integer

Answer 1

尝试

comic = COMICS[params['key'].to_i]

参数来自路径，所以它是一个字符串。

按键获取数组元素

Get array element by key

ruby

arrays

sinatra