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事实、观念、词语、命题——《简单的逻辑学》读书笔记之一

此读书笔记，以英文原版为基准，同时参考中文版。考虑到中文和英文在表达上的差距，笔记中关键词汇和语句用英文标示，部分中文译文根据自己理解而写。在开始逻辑思维前，要弄清楚事实、观念、词语、命题、有效沟通及真相等基本概念。人类的认知主要由三部分组成：客观事实 (An Object...

Posted by on December 30, 2017

如何把seed-rb推到Heroku上

解法思路在seed.rb 里输入 #账户的写法 #管理员账户 create_account = User.create([email: 'mjadmin@jdstore3.com', password:'123456', password_confirmation: '123456', i...

Posted by on July 15, 2017

NoMethodError-in-Admin--Products#update

<%= select_tag(:category_id, options_for_select(@categories), :prompt => "类别") %> 解决方法 http://fanliangchun.logdown.com/posts/1365905-1-30...

Posted by on March 17, 2017

添加分类功能-Category-for-Ruby-On-Rails-app

参考https://blog.skcript.com/implementing-categories-in-ruby-on-rails-14c2b5e77b34#.ugsdz8w8b 参考http://taomengdi99.logdown.com/posts/1420713 近日做了一个商...

Posted by on March 5, 2017

Git放弃本地更改

在本地修改的文件，If unstaged, 而且我也想放弃commit. git checkout -- .

Posted by on March 2, 2017

如何push指定branch到git repo

How to push a branch to git repo 在利用git做版本管理时，已经checkout了许多分支，如下所示。这时想push指定分支（story7_homepage2.0）到github，应该怎么做了。 MacBook-Pro ⮀ ~/jdstore ⮀ ⭠ sto...

Posted by on March 1, 2017

git-merge:如何merge一个branch到另外一个branch

参考链接 http://superuser.com/questions/340471/how-can-i-merge-two-branches-without-losing-any-files 假如我现在有两个branch：story6header and competition. 我想把c...

Posted by on February 28, 2017

执行git-commit命令不小心进入了VI-VIM，怎么退出？

参考链接http://stackoverflow.com/questions/19085807/please-enter-a-commit-message-to-explain-why-this-merge-is-necessary-especially 在vi模式下输入 To solve...

Posted by on February 28, 2017