当我尝试通过Ti.Geolocation.locationServiceEnabled命令启动我的Sinatra应用程序时，我收到此错误：
rackup但是当我使用/home/matteog/Scrivania/ruby_ws/config.ru:1:in `block in <main>': undefined method `require' for #<Rack::Builder:0x000000027d4e50> (NoMethodError)
from /home/matteog/.rvm/gems/ruby-2.1.2/gems/rack-1.6.4/lib/rack/builder.rb:55:in `instance_eval'
from /home/matteog/.rvm/gems/ruby-2.1.2/gems/rack-1.6.4/lib/rack/builder.rb:55:in `initialize'
from /home/matteog/Scrivania/ruby_ws/config.ru:in `new'
from /home/matteog/Scrivania/ruby_ws/config.ru:in `<main>'
from /home/matteog/.rvm/gems/ruby-2.1.2/gems/rack-1.6.4/lib/rack/builder.rb:49:in `eval'
from /home/matteog/.rvm/gems/ruby-2.1.2/gems/rack-1.6.4/lib/rack/builder.rb:49:in `new_from_string'
from /home/matteog/.rvm/gems/ruby-2.1.2/gems/rack-1.6.4/lib/rack/builder.rb:40:in `parse_file'
from /home/matteog/.rvm/gems/ruby-2.1.2/gems/rack-1.6.4/lib/rack/server.rb:299:in `build_app_and_options_from_config'
from /home/matteog/.rvm/gems/ruby-2.1.2/gems/rack-1.6.4/lib/rack/server.rb:208:in `app'
from /home/matteog/.rvm/gems/ruby-2.1.2/gems/rack-1.6.4/lib/rack/server.rb:336:in `wrapped_app'
from /home/matteog/.rvm/gems/ruby-2.1.2/gems/rack-1.6.4/lib/rack/server.rb:272:in `start'
from /home/matteog/.rvm/gems/ruby-2.1.2/gems/rack-1.6.4/lib/rack/server.rb:147:in `start'
from /home/matteog/.rvm/gems/ruby-2.1.2/gems/rack-1.6.4/bin/rackup:4:in `<top (required)>'
from /home/matteog/.rvm/gems/ruby-2.1.2/bin/rackup:23:in `load'
from /home/matteog/.rvm/gems/ruby-2.1.2/bin/rackup:23:in `<main>'
from /home/matteog/.rvm/gems/ruby-2.1.2/bin/ruby_executable_hooks:15:in `eval'
from /home/matteog/.rvm/gems/ruby-2.1.2/bin/ruby_executable_hooks:15:in `<main>'
时，我没有任何问题。我的ruby helloworld.rb非常简单：
config.ru此外，我在require 'helloworld'
run Sinatra::Application
之前成功执行bundle install，使用此Gemfile（省略输出）：
rackup答案 0 :(得分：1)
解决chat - 对于遇到相同问题的人的摘要：
如果我将其粘贴到VIM中，我会得到：
undefined method `<feff>require' for
Unicode 0xFEFF是BOM character，可能由编辑器插入。