ruby-on-rails - Rails 应用程序在 Heroku 上失败 : (No route matches [GET] "/")-6ren

ruby-on-rails - Rails 应用程序在 Heroku 上失败 : (No route matches [GET] "/")

转载作者：行者123 更新时间：2023-12-03 00:41:19

Rails 和 Heroku 的新手，我正在尝试按照 Rails Tutorial 中的分步说明部署一个简单的应用程序。。该应用程序在本地运行良好并显示默认的 Rails 起始页。但是在 Heroku 中导航到应用程序 URL 时不断出现 404 Page Not Found，即使它是同一个应用程序并且我没有触及路由文件或任何 Controller 等。

我使用的是 Mac 10.6.8，带有最新的 Ruby (1.9.3) 和 Rails (4.0.0)。

我尝试过的事情:

遵循Rails 3.1.3 on Heroku: (No route matches [GET] "/assets/rails.png")中的答案我向 config/application.rb 添加了代码，用于在生产中延迟编译 Assets :

if defined?(Bundler)
  # If you want your assets lazily compiled in production, use this line
  Bundler.require(:default, :assets, Rails.env)
end

遵循Rails production static files routing error中的答案我修改了 Production.rb 以确保提供静态资源:

config.serve_static_assets = true

但我仍然收到 404。我还能尝试什么？

Heroku 日志:

2013-05-31T16:39:41.675219+00:00 app[web.1]: ActionController::RoutingError (No route matches [GET] "/"):
2013-05-31T16:39:41.675219+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/actionpack-4.0.0.rc1/lib/action_dispatch/middleware/debug_exceptions.rb:21:in `call'
2013-05-31T16:39:41.675513+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/railties-4.0.0.rc1/lib/rails/rack/logger.rb:21:in `call'
2013-05-31T16:39:41.675219+00:00 app[web.1]: F, [2013-05-31T16:32:49.152450 #2] FATAL -- : 
2013-05-31T16:39:41.675513+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/actionpack-4.0.0.rc1/lib/action_dispatch/middleware/request_id.rb:21:in `call'
2013-05-31T16:39:41.675513+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/rack-1.5.2/lib/rack/methodoverride.rb:21:in `call'
2013-05-31T16:39:41.675513+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/activesupport-4.0.0.rc1/lib/active_support/tagged_logging.rb:67:in `block in tagged'
2013-05-31T16:39:41.676016+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/actionpack-4.0.0.rc1/lib/action_dispatch/middleware/debug_exceptions.rb:21:in `call'
2013-05-31T16:39:41.675513+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/activesupport-4.0.0.rc1/lib/active_support/tagged_logging.rb:25:in `tagged'
2013-05-31T16:39:41.675513+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/actionpack-4.0.0.rc1/lib/action_dispatch/middleware/static.rb:64:in `call'
2013-05-31T16:39:41.675777+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/rack-1.5.2/lib/rack/handler/webrick.rb:60:in `service'
2013-05-31T16:39:41.675513+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/activesupport-4.0.0.rc1/lib/active_support/tagged_logging.rb:67:in `tagged'
2013-05-31T16:39:41.675777+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/rack-1.5.2/lib/rack/lock.rb:17:in `call'
2013-05-31T16:39:41.676016+00:00 app[web.1]: F, [2013-05-31T16:32:52.415675 #2] FATAL -- : 
2013-05-31T16:39:41.675513+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/rack-1.5.2/lib/rack/runtime.rb:17:in `call'
2013-05-31T16:39:41.675777+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/rack-1.5.2/lib/rack/content_length.rb:14:in `call'
2013-05-31T16:39:41.675777+00:00 app[web.1]: 
2013-05-31T16:39:41.675777+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/railties-4.0.0.rc1/lib/rails/engine.rb:511:in `call'
2013-05-31T16:39:41.675777+00:00 app[web.1]: 
2013-05-31T16:39:41.676016+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/activesupport-4.0.0.rc1/lib/active_support/tagged_logging.rb:67:in `block in tagged'
2013-05-31T16:39:41.675777+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/railties-4.0.0.rc1/lib/rails/application.rb:96:in `call'
2013-05-31T16:39:41.675777+00:00 app[web.1]:   vendor/ruby-1.9.3/lib/ruby/1.9.1/webrick/httpserver.rb:138:in `service'
2013-05-31T16:39:41.675777+00:00 app[web.1]:   vendor/ruby-1.9.3/lib/ruby/1.9.1/webrick/httpserver.rb:94:in `run'
2013-05-31T16:39:41.676016+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/actionpack-4.0.0.rc1/lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
2013-05-31T16:39:41.675513+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/activesupport-4.0.0.rc1/lib/active_support/cache/strategy/local_cache.rb:83:in `call'
2013-05-31T16:39:41.676016+00:00 app[web.1]: I, [2013-05-31T16:32:52.414612 #2]  INFO -- : Started GET "/" for 67.244.94.162 at 2013-05-31 16:32:52 +0000
2013-05-31T16:39:41.676016+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/railties-4.0.0.rc1/lib/rails/rack/logger.rb:21:in `block in call'
2013-05-31T16:39:41.676016+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/railties-4.0.0.rc1/lib/rails/rack/logger.rb:38:in `call_app'
2013-05-31T16:39:41.676253+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/actionpack-4.0.0.rc1/lib/action_dispatch/middleware/static.rb:64:in `call'
2013-05-31T16:39:41.676016+00:00 app[web.1]: ActionController::RoutingError (No route matches [GET] "/"):
2013-05-31T16:39:41.676016+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/activesupport-4.0.0.rc1/lib/active_support/tagged_logging.rb:25:in `tagged'
2013-05-31T16:39:41.676253+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/rack-1.5.2/lib/rack/lock.rb:17:in `call'
2013-05-31T16:39:41.676253+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/actionpack-4.0.0.rc1/lib/action_dispatch/middleware/request_id.rb:21:in `call'
2013-05-31T16:39:41.675777+00:00 app[web.1]:   vendor/ruby-1.9.3/lib/ruby/1.9.1/webrick/server.rb:191:in `block in start_thread'
2013-05-31T16:39:41.676016+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/activesupport-4.0.0.rc1/lib/active_support/tagged_logging.rb:67:in `tagged'
2013-05-31T16:39:41.676253+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/railties-4.0.0.rc1/lib/rails/application.rb:96:in `call'
2013-05-31T16:39:41.676490+00:00 app[web.1]: 
2013-05-31T16:39:41.676253+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/activesupport-4.0.0.rc1/lib/active_support/cache/strategy/local_cache.rb:83:in `call'
2013-05-31T16:39:41.676490+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/rack-1.5.2/lib/rack/handler/webrick.rb:60:in `service'
2013-05-31T16:39:41.676490+00:00 app[web.1]: 
2013-05-31T16:39:41.676253+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/rack-1.5.2/lib/rack/methodoverride.rb:21:in `call'
2013-05-31T16:39:41.676253+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/rack-1.5.2/lib/rack/content_length.rb:14:in `call'
2013-05-31T16:39:41.676490+00:00 app[web.1]:   vendor/ruby-1.9.3/lib/ruby/1.9.1/webrick/httpserver.rb:94:in `run'
2013-05-31T16:39:41.676253+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/rack-1.5.2/lib/rack/runtime.rb:17:in `call'
2013-05-31T16:39:41.676253+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/railties-4.0.0.rc1/lib/rails/engine.rb:511:in `call'
2013-05-31T16:39:41.676490+00:00 app[web.1]:   vendor/ruby-1.9.3/lib/ruby/1.9.1/webrick/server.rb:191:in `block in start_thread'
2013-05-31T16:39:41.676490+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/actionpack-4.0.0.rc1/lib/action_dispatch/middleware/debug_exceptions.rb:21:in `call'
2013-05-31T16:39:41.676253+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/railties-4.0.0.rc1/lib/rails/rack/logger.rb:21:in `call'
2013-05-31T16:39:41.676490+00:00 app[web.1]: I, [2013-05-31T16:38:42.543864 #2]  INFO -- : Started GET "/" for 67.244.94.162 at 2013-05-31 16:38:42 +0000
2013-05-31T16:39:41.676725+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/railties-4.0.0.rc1/lib/rails/rack/logger.rb:21:in `call'
2013-05-31T16:39:41.676725+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/rack-1.5.2/lib/rack/runtime.rb:17:in `call'
2013-05-31T16:39:41.676725+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/activesupport-4.0.0.rc1/lib/active_support/tagged_logging.rb:67:in `tagged'
2013-05-31T16:39:41.676725+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/railties-4.0.0.rc1/lib/rails/rack/logger.rb:38:in `call_app'
2013-05-31T16:39:41.676490+00:00 app[web.1]: ActionController::RoutingError (No route matches [GET] "/"):
2013-05-31T16:39:41.676725+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/actionpack-4.0.0.rc1/lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
2013-05-31T16:39:41.676725+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/activesupport-4.0.0.rc1/lib/active_support/tagged_logging.rb:67:in `block in tagged'
2013-05-31T16:39:41.676725+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/activesupport-4.0.0.rc1/lib/active_support/tagged_logging.rb:25:in `tagged'
2013-05-31T16:39:41.676725+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/rack-1.5.2/lib/rack/methodoverride.rb:21:in `call'
2013-05-31T16:39:41.676490+00:00 app[web.1]:   vendor/ruby-1.9.3/lib/ruby/1.9.1/webrick/httpserver.rb:138:in `service'
2013-05-31T16:39:41.676490+00:00 app[web.1]: F, [2013-05-31T16:38:42.544833 #2] FATAL -- : 
2013-05-31T16:39:41.677196+00:00 app[web.1]: 
2013-05-31T16:39:41.677196+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/actionpack-4.0.0.rc1/lib/action_dispatch/middleware/debug_exceptions.rb:21:in `call'
2013-05-31T16:39:41.676961+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/activesupport-4.0.0.rc1/lib/active_support/cache/strategy/local_cache.rb:83:in `call'
2013-05-31T16:39:41.676961+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/rack-1.5.2/lib/rack/content_length.rb:14:in `call'
2013-05-31T16:39:41.676961+00:00 app[web.1]:   vendor/ruby-1.9.3/lib/ruby/1.9.1/webrick/httpserver.rb:138:in `service'
2013-05-31T16:39:41.676961+00:00 app[web.1]:   vendor/ruby-1.9.3/lib/ruby/1.9.1/webrick/httpserver.rb:94:in `run'
2013-05-31T16:39:41.677196+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/activesupport-4.0.0.rc1/lib/active_support/tagged_logging.rb:67:in `block in tagged'
2013-05-31T16:39:41.677432+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/actionpack-4.0.0.rc1/lib/action_dispatch/middleware/request_id.rb:21:in `call'
2013-05-31T16:39:41.677196+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/actionpack-4.0.0.rc1/lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
2013-05-31T16:39:41.677665+00:00 app[web.1]:   vendor/ruby-1.9.3/lib/ruby/1.9.1/webrick/httpserver.rb:94:in `run'
2013-05-31T16:39:41.676961+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/actionpack-4.0.0.rc1/lib/action_dispatch/middleware/static.rb:64:in `call'
2013-05-31T16:39:41.677196+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/railties-4.0.0.rc1/lib/rails/rack/logger.rb:38:in `call_app'
2013-05-31T16:39:41.677432+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/rack-1.5.2/lib/rack/methodoverride.rb:21:in `call'
2013-05-31T16:39:41.676961+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/railties-4.0.0.rc1/lib/rails/engine.rb:511:in `call'
2013-05-31T16:39:41.676961+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/rack-1.5.2/lib/rack/lock.rb:17:in `call'
2013-05-31T16:39:41.677196+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/railties-4.0.0.rc1/lib/rails/rack/logger.rb:21:in `block in call'
2013-05-31T16:39:41.677432+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/railties-4.0.0.rc1/lib/rails/rack/logger.rb:21:in `call'
2013-05-31T16:39:41.677432+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/railties-4.0.0.rc1/lib/rails/engine.rb:511:in `call'
2013-05-31T16:39:41.677665+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/rack-1.5.2/lib/rack/lock.rb:17:in `call'
2013-05-31T16:39:41.676725+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/railties-4.0.0.rc1/lib/rails/rack/logger.rb:21:in `block in call'
2013-05-31T16:39:41.676725+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/actionpack-4.0.0.rc1/lib/action_dispatch/middleware/request_id.rb:21:in `call'
2013-05-31T16:39:41.676961+00:00 app[web.1]:   vendor/ruby-1.9.3/lib/ruby/1.9.1/webrick/server.rb:191:in `block in start_thread'
2013-05-31T16:39:41.677196+00:00 app[web.1]: 
2013-05-31T16:39:41.677196+00:00 app[web.1]: I, [2013-05-31T16:39:41.674148 #2]  INFO -- : Started GET "/" for 67.244.94.162 at 2013-05-31 16:39:41 +0000
2013-05-31T16:39:41.676969+00:00 heroku[router]: at=info method=GET path=/ host=floating-refuge-5703.herokuapp.com fwd="67.244.94.162" dyno=web.1 connect=0ms service=5ms status=404 bytes=1351
2013-05-31T16:39:41.676961+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/railties-4.0.0.rc1/lib/rails/application.rb:96:in `call'
2013-05-31T16:39:41.676961+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/rack-1.5.2/lib/rack/handler/webrick.rb:60:in `service'
2013-05-31T16:39:41.677196+00:00 app[web.1]: ActionController::RoutingError (No route matches [GET] "/"):
2013-05-31T16:39:41.677432+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/rack-1.5.2/lib/rack/runtime.rb:17:in `call'
2013-05-31T16:39:41.677665+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/rack-1.5.2/lib/rack/content_length.rb:14:in `call'
2013-05-31T16:39:41.677432+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/activesupport-4.0.0.rc1/lib/active_support/tagged_logging.rb:67:in `tagged'
2013-05-31T16:39:41.677665+00:00 app[web.1]: 
2013-05-31T16:39:41.677432+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/actionpack-4.0.0.rc1/lib/action_dispatch/middleware/static.rb:64:in `call'
2013-05-31T16:39:41.677665+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/rack-1.5.2/lib/rack/handler/webrick.rb:60:in `service'
2013-05-31T16:39:41.677432+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/activesupport-4.0.0.rc1/lib/active_support/cache/strategy/local_cache.rb:83:in `call'
2013-05-31T16:39:41.677665+00:00 app[web.1]:   vendor/ruby-1.9.3/lib/ruby/1.9.1/webrick/httpserver.rb:138:in `service'
2013-05-31T16:39:41.677665+00:00 app[web.1]: 
2013-05-31T16:39:41.677196+00:00 app[web.1]: F, [2013-05-31T16:39:41.675079 #2] FATAL -- : 
2013-05-31T16:39:41.677432+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/activesupport-4.0.0.rc1/lib/active_support/tagged_logging.rb:25:in `tagged'
2013-05-31T16:39:41.677432+00:00 app[web.1]:   vendor/bundle/ruby/1.9.1/gems/railties-4.0.0.rc1/lib/rails/application.rb:96:in `call'
2013-05-31T16:39:41.677665+00:00 app[web.1]:   vendor/ruby-1.9.3/lib/ruby/1.9.1/webrick/server.rb:191:in `block in start_thread'

最佳答案

首先是Rails4应用程序no longer serve public/index.html或 app/assets/rails.png，因为这些文件现在由 Rails gem 本身处理，因此您可以安全地忽略与它们相关的所有讨论。

其次，我建议您忽略question中给出的建议。您链接到，因为它与rails4 完全不相关。如果您使用 heroku，则无需预编译您的 Assets 。当您将应用程序推送给他们时，他们会为您做这件事。可能值得删除您在运行 rake assets:precompile 时创建的 public/assets 文件夹，因为它只会妨碍

第三，删除添加到 config/application.rb 中的代码，因为其中有 no assets group in Rails 4

第四，heroku 曾经向您的应用程序注入(inject)一个用于提供静态资源的插件，但现在您需要 do that yourself将以下内容添加到您的 Gemfile 中:

gem 'rails_log_stdout',           github: 'heroku/rails_log_stdout'
gem 'rails3_serve_static_assets', github: 'heroku/rails3_serve_static_assets'

第五，您正在使用Webrick服务器。 Heroku 建议您switch to Unicorn .

最后，不用担心默认的 Rails 登录页面不会在 Heroku 上显示。这可能是他们系统中的一个错误，它发生在我身上，它也会发生在下一个人身上，如果他也尝试的话，它很可能会发生在马茨身上。没什么大不了的。继续前进吧。您的应用程序已准备好，您可以开始开发自己的着陆页。

祝你好运，不管怎样，这里有一个针对 Heroku 优化的非常简单的 Gemfile 示例:

source 'https://rubygems.org'

# you are using Ruby 1.9.3, better to 2.0.0 upgrade for more speed
ruby '2.0.0'

gem 'rails', '4.0.0.rc1'    
gem 'sass-rails', '~> 4.0.0.rc1'    
gem 'uglifier', '>= 1.3.0'
gem 'coffee-rails', '~> 4.0.0'
gem 'jquery-rails'
gem 'turbolinks'    
gem 'jbuilder', '~> 1.0.1'

# The asset_sync gem is WELL worth using
# but you should read more about it before deciding
# https://github.com/rumblelabs/asset_sync
# gem 'asset_sync'

# only want sqlite in dev and test envs
group :development, :test do
  gem 'sqlite3'
end

group :production do
  gem 'pg' # dont want sqlite in production
  gem 'unicorn' # make sure you follow installation instructions for this gem
  gem 'rails_log_stdout',           github: 'heroku/rails_log_stdout'
  gem 'rails3_serve_static_assets', github: 'heroku/rails3_serve_static_assets'
end

group :doc do
  gem 'sdoc', require: false
end

关于ruby-on-rails - Rails 应用程序在 Heroku 上失败 : (No route matches [GET] "/")，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/16862855/

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我正在尝试为匹配中的每个匹配呈现一些 HTML，但是，我不太确定实际上是正确的。更具体地说，我不确定我是否可以使用 v-bind:match='match'在与循环相同的元素上 v-for='ma
match - Any.match 是做什么的？
它具有看似简单的代码: method match(Any:U: |) { self.Str; nqp::getlexcaller('$/') = Nil } 但是，这是它的行为: (^3).matc
python - 替代 `match = re.match(); if match: ...` 成语？
如果您想检查某项是否与正则表达式匹配，如果是，请打印第一组，您就可以了.. import re match = re.match("(\d+)g", "123g") if match is not N
mysql - MATCH (field1, field2) 和 MATCH(field1) OR MATCH(field2) 之间的区别
以下两个查询的结果有差异吗？ SELECT * FROM table1, table2 WHERE ( MATCH(table1.row1) AGAINST('searchstring' IN
vim 语法 : match only when between other matches
我正在尝试为我的日志文件创建一个语法文件。它们采用以下格式: [time] LEVEL filepath:line - message 我的语法文件如下所示: :syn region logTime
ruby - 为什么 `Symbol#match` 的行为与 `String#match` 和 `Regexp#match` 不同？
String#match 和 Regexp#match 在匹配成功时返回一个 MatchData: "".match(//) # => # //.match("") # => # //.match(:
swift - 实例方法 'match(match:player:didChangeState:)'几乎匹配协议(protocol) 'match(_:player:didChange:)'的可选要求 'GKMatchDelegate'
我的代码中有这个函数: func match(match: GKMatch, player playerID: String, didChangeState state: GKPlayerConnec
match - case 和 match 有什么区别？
我对 match 和 case 之间的区别感到困惑。在 document ，其中提到match支持通用模式匹配。 > (define (m x) (match x [(list a
javascript - .match ("") 和 .match(/^$/) 有什么区别？
我在检查特定元素中的空 HTML 内容时遇到了问题。当我使用 someElement.trim().match("") 即使 HTML 内容为空，我有时也会得到 true。我改成了 someEleme
python - 正则表达式 : match within a match
我正在尝试使用正则表达式查找包含特定词的两个词之间的所有内容，但是这些词是重复的，所以我没有得到我想要的匹配项。例如，我想要“你好”和“再见”之间的所有内容，以便它们之间存在“苹果”一词: hell
HTTP If-None-Match 与 If-Match
我目前正在构建一个 PHP 脚本，它将在需要时响应 HTTP“304 Not Modified”。 (请参阅 question #2086712 了解我目前所做的事情)。目前我回答以下问题: If-
ruby 正则表达式 : Matching a < without a matching >
给定以下 XML 10 我希望能够正确识别内部的 s : result = subject.gsub(/]*>)/, '<') 解释: ]* # any number of charact
excel - If Not IsError(MATCH) 没有绕过错误。如何跳过未找到的 MATCHes？
这个问题在这里已经有了答案: How to error handle 1004 Error with WorksheetFunction.VLookup? (3 个回答) 3年前关闭。目标:查找输入
arrays - -match…和|之间的区别其中{$ _ -match…}
我已经尝试了好一阵子了，但是我似乎无法弄清楚这两者之间的区别。特别是，与数据数组有关的差异: PS C:>$myarray = "a", "ab", "abc" PS C:>$myarray -mat
clojure - 将模式和结果作为向量传递给 core.match/match 的宏
我正在努力研究如何构建一个宏，让我可以将模式和结果以向量的形式传递给 core.match/match 。我希望能够做到这一点: (let [x {:a 1} patterns [[{:a
javascript - "matches x and remembers the match"在正则表达式中意味着什么
这个问题在这里已经有了答案: Reference - What does this regex mean? (1 个回答) 关闭 8 年前。如果这看起来微不足道但只是为了理解正则表达式，请原谅我:
php - 为什么 MATCH against 的效果不如 Exact match？
我的 MySQL 表中有大约 20 行，其 Title 列为 Elsewhere 并具有其他不同的列参数。我目前正在使用这样的查询，因为我的大多数搜索(通过 PHP 文件)都需要我进行猜测。所以我使
MYSQL : match and remove matched word from string
当找到匹配时，我必须从字符串中删除单词让我们看看我的输入字符串是 “肯诺克斯路” 比赛表演中的单词表街道驾驶道路 4. 车道输出字符串应该是: KENOX 我正在使用 vb.net 作为此
python - 正则表达式 : How to match using previous matches?
我正在搜索以下形式的字符串模式: XXXAXXX # exactly 3 Xs, followed by a non-X, followed by 3Xs 所有的 X 必须是相同的字符，并且 A 不能
javascript - gulp version.match -> 无法读取属性 "match"
好吧，我是 gulp 和 sass 的新手，我正在努力让它发挥作用。我正确安装了所有东西，但我收到了这个愚蠢的错误。有解决办法吗？ PS C:\Users\Bojan Kolano\Desktop\F

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ruby-on-rails - Rails 应用程序在 Heroku 上失败 : (No route matches [GET] "/")