视频： 幻灯片： https://speakerdeck.com/pmq20/rubyconf-2017-packing-your-ruby-application-into-a-single-executable 项目地址： https://github.com/pmq20/ruby-packer 讲稿全文： Good morning, Ruby Conf! I

在 Gemfile 中写了 gem "therubyracer" 据说要安装两个 gem gem install libv8 gem install therubyracer 执行 gem

Could Sidekiq Use concurrent-ruby? 模型如下: 核心的组件包括 Manager Manager 根据用户设置的并发数, 生成处理队列任务的 Processor, 并对 idle 或者 dead 的 Processsor 进行管理, 包括: 1. start: Spin up Processors. 2. processor_died: Handle job failure, throw away Processor, create

could likely be tweaked for different systems without too much fuss. Let’s begin! INSTALLING EMACS HEAD To do this we’ll use homebrew, observe: $ brew install emacs --cocoa --use-git-head --HEAD $ mv /usr/local/Cellar/emacs/HEAD/Emacs.app

最近在网上看到一些文章里说：“change buffer 只适用于非唯一索引页。” 其实这个观点是错的，先来看看官方文档对 change buffer 的介绍： 文档地址：https://dev.mysql.com/doc/refman/8.0/en/innodb-change-buffer.html The change

could take a while... ERROR: Error installing redcarpet: ERROR: Failed to build gem native extension. current directory: /home/kevin/.rbenv/versions/2.4.3/lib/ruby/gems/2.4.0/gems/redcarpet-3.4.0/ext/redcarpet /home/kevin/.rbenv/versions/2.4.3/bin/ruby -r ./siteconf20180111-24116-8kyrcv.rb extconf.rb creating Makefile current directory: /home/kevin/.rbenv/versions/2.4.3/lib/ruby/gems/2.4.0/gems/redcarpet-3.4.0/ext/redcarpet make "DESTDIR=" clean current directory: /home/kevin/.rbenv/versions/2.4.3/lib/ruby/gems/2.4.0/gems/redcarpet-3.4.0/ext/redcarpet make "DESTDIR

操作系统：centos7 x64 ruby: ruby 2.2.1p85 (2015-02-26 revision 49769) [x86_64-linux

could potentially get us into the GC, which we're trying to avoid (and hey, memory savings are always good). Option 4: ActiveRecord::Extensions njero in #rubyonrails pointed me at this nifty little

第一次弄,在本论坛某位 github 上下的一个 rails 项目,需要 mongo 数据库,我用 brew 安装的。参照官方文档说如果我正确安装 brew 的话

我的 rails 环境是用 windows installer 安装的。不知错误是什么原因，错误记录： C:\Sites>gem install caldecott Temporarily enhancing

Couldn't find Product without an ID 并且这个链接并不是我想要的：http://localhost:3000/cart/4 2、将此页面刷新，可以链接到页面但不是'Line item was successfully created'通知的信息，感觉链接有错误 同样的链接地址，居然刷新后可以出来 问题代码如下，求大神指导 #代码1 #/views/store/index.html.erb #添加的button_to按钮，并且传递了商品的ID <%= button_to 'Add to Cart

感谢大家近一段时间的申请与关注, 我们已经在申请者中确定了几名远程雇员。我们还有职位等待诸位继续申请。下面是它们的英文描述。如果有兴趣，请发送简历至 [email protected]。请注明你申请哪一个职位。 Back End Engineer We are looking for

could take a while... ERROR: Error installing ruby-debug-base19x-0.11.29.gem: ERROR: Failed to build gem native extension. C:/RailsInstaller/Ruby1.9.3/bin/ruby.exe extconf.rb checking for rb_method_entry_t.body in method.h... no checking for vm_core.h... no C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/ruby_core_source-0.1.5/lib/ ruby_core_source.rb:39: Use RbConfig instead

could take a while... ERROR: Error installing mysql2: ERROR: Failed to build gem native extension. /Users/sandy/.rvm/rubies/ruby-1.9.3-p194/bin/ruby extconf.rb checking for rb_thread_blocking_region()... yes checking for rb_wait_for_single_fd()... yes checking for mysql.h

学习 ruby on rails 有一段时间了，也写过一些简单的程序。但对 rails 一直充满神秘感，为什么我们把代码填充到 controller、view、model 里，再执行一下

couldn't connect to server 127.0.0.1:27017 at src/mongo/shell/mongo.js:147 exception: connect failed 还是不行， 在网上搜了好多，http://www.markpoor.com/connecting_mongodb_failed/说得清楚： 就是：电脑/服务器崩溃->非安全关闭，触发 mongodb 保护程序->系统自动在数据库根目录的 mongod.lock 文件上做记录->mongod.lock 非空，mongd 程序拒绝启动->无法连接数据库 因为我用的是虚拟机

notes to Qiita in single click 仅需按下 “Qiita に投稿”，去看看 Qiita, 阿哈! 亦可使用自己喜爱的编辑器自分の好きなエディタから編集可能 Editing with your favorite editor 因为专注，所以快速。メモに特化することで得た軽快さ LESS IS MORE. 没有不需要的功能。专注你所需要的功能，使得 Kobito 又快又轻量。 支持常见键盘操作キーボード操作へのこだわり 支持常见的键盘操作，使你手不离键盘，效率更高。 简单整理你的笔记タグで簡単に整理 Breadcrumb

Note:** 因为 `capistrano` 是十分有用的，他将会搜索你的 file tree 直到它找到了一个名叫 `capfile` 的文件，这里意图确保你在你的应用程序的任何位置，你尝试并运行 `cap`,它将会找到正确的 `capfile`；this has been known to catch people out though；你的 home 目录也会被搜索。 ### A Simple Example 一个简单的例子 闲聊了太多了，来看看一个很简单的 `capfile`，来明白它会是什么样的

前几天遇到的问题，是使用 gem install mysql 遇到的。报下面的错误 Building native extensions. This could take a while

https://github.com/candlerb/string19/blob/master/soapbox.rb It's buggy as hell. I found loads of bugs just in

noticeable impact. EXPECTATIONS AND TASKS Drive, design, and develop new features by working with Product Management, User Experience, and Software Testing to elaborate on the features, estimate task time, and then quickly write high-quality

could take a while... ERROR: Error installing pg: ERROR: Failed to build gem native extension. current directory: /Users/chris/.rvm/gems/ruby-2.6.0/gems/pg-1.1.4/ext /Users/chris/.rvm/rubies/ruby-2.6.0/bin/ruby -I /Users/chris/.rvm/rubies/ruby-2.6.0/lib/ruby/2.6.0 -r ./siteconf20190512-93337-1jm5hew.rb extconf.rb checking for pg_config... yes Using config values from /usr/local/bin/pg_config checking

simple While and Sub and If module main; // crispy basic programming language import std.stdio; import

ruby 是用 rvm 安装的，有高手碰到过这样的问题吗： 错误信息： gem install eventmachine Building native extensions. This could take

couldn't build any C extensions. By the way, Ruby is written in C and there are a wealth of libraries that require C extensions to build correctly. For beginners to run into these errors

could drive people crazy if you do. But just so you know that you can, here it is. prc = proc {|num| num == 4} prc.instance_exec { def == other; other == 3 end } prc.call(4) # => true prc.call

hello 大家，我正在阅读 rails 4 的教程，在进行到第八章测试 authentication_pages 时，总是通不过，查了很多资料都不行，我也在 stackover 发了一篇帖子

我的 libv8 版本是 3.3.10.4 gcc48 求指教怎么把 therubyracer 给装上去.. Building native extensions. This could take