我搜索过这个问题,找不到相关的类似问题.如果重复,请耐心等待.
我已经按照RVM网站中的指南安装RVM并且我已经安装了rubies:
syed@rails:~$ rvm list
rvm rubies
ruby-1.8.7-p302 [ i386 ]
=> ruby-1.9.2-p0 [ i386 ]
正如您所看到的,我将ruby-1.9.2设为默认值.
这是我的gem目录:
syed@rails:~$ rvm gemdir
/home/syed/.rvm/gems/ruby-1.9.2-p0
现在,我试图安装rails,我抛出以下错误:
syed@rails:~$ gem install rails
ERROR: While executing gem ... (Errno::EACCES)
Permission denied - /home/syed/.gem/specs
我甚至做了这个,没有对错误产生任何影响:
syed@rails:~$ chown -R syed /home/syed/.rvm/
目前,我的环境看起来像这样:
syed@rails:~$ gem environment
RubyGems Environment:
- RUBYGEMS VERSION: 1.3.7
- RUBY VERSION: 1.9.2 (2010-08-18 patchlevel 0) [i686-linux]
- INSTALLATION DIRECTORY: /home/syed/.rvm/gems/ruby-1.9.2-p0@rails3
- RUBY EXECUTABLE: /home/syed/.rvm/rubies/ruby-1.9.2-p0/bin/ruby
- EXECUTABLE DIRECTORY: /home/syed/.rvm/gems/ruby-1.9.2-p0@rails3/bin
- RUBYGEMS PLATFORMS:
- ruby …我正在使用Devise开发Rails3应用程序进行身份验证.在工作流程中,像patient_id这样的数据存储在会话中.但是,当用户登出时,需要清除会话.我无法弄清楚如何重置会话数据,因为Devise处理用户登录/注销并且我无法控制它.
如何处理这种情况？
ALLOWED_TARGETS = ["dresden", "paris", "vienna"]
def missile_launch_allowed(target, secret_key)
allowed = true
?llowed = false if secret_key != 1234
allowed = false unless ALLOWED_TARGETS.include?(target)
allowed
end
puts(missile_launch_allowed("dresden", 9999))
Found this code snippet in a blog. Tracking the code by hand gives me false, but why does this output true when run?
The part I am not seeing is just not crossing my mind at the moment. Please help me understand Ruby a bit better.
代码显示工具提示图标，但当我悬停在它上面时不显示任何内容。如何在悬停时启用它，就像下面的数字一样。
https://vuetifyjs.com/en/components/tooltips
<v-text-field label="Name" id="name" disabled>
<v-tooltip slot="append" :value="true" bottom>
<v-icon slot="activator" color="primary" dark>live_help</v-icon>
<span>Name of the user</span>
</v-tooltip>
</v-text-field>
<v-text-field label="number" id="number">
<v-tooltip slot="append" bottom>
<v-icon slot="activator" color="primary" dark>live_help</v-icon>
<span> Number of years</span>
</v-tooltip>
</v-text-field>