chengyuanheng
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chengyuanheng：
好吧 ，已改！
how to build a ruby gem -
心静如止水：
...
cmd命令 -
心静如止水：
"creata"写错了，第一句话
how to build a ruby gem -
chengyuanheng：
why I need create a new file na ...
how to set alias and cancel alias in linux ? -
zhangfortune：
why fortune in your fu*king ali ...
how to set alias and cancel alias in linux ?
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安装java环境
sudo apt-get update
java -version
sudo apt-get install default-jre
sudo apt-get install default-jdk
（或者： yum -y install java-1.7.0-openjdk* ）
关于canvas的最大宽度
- 博客分类：
- html5
Chrome里面canvas的最大宽度是：32767px;
Firefox里面canvas的最大宽度是：32766px;
------------------------------------------------------------
超过这个最大宽度将无法画出东西来！
install metric_fu
- 博客分类：
- gem
metric_fu
Installation
gem install metric_fu
Gem
From your Gemfile ,install these gems for test and development environment
group :test ,:development do
gem "metric_fu"
gem 'simplecov'
gem 'simplecov-rcov-text'
gem 'roodi' #these gem ensure that you can run roodi ...
how to build a ruby gem
- 博客分类：
- gem
how to build a ruby gem
1. first you will create a user in rubygem.org (https://rubygems.org/)
2. create the directory structure like this:
$ tree
.
├── cc_hola.gemspec
└── lib
└── cc_hola.rb
you can use any name but you must keep consistency
3. in ...
markdown在线编辑器
- 博客分类：
- note
markdown在线编辑器
地址： http://mahua.jser.me/
custom layout for devise in ruby on rails
in your config/application.rb puts:
config.to_prepare do
Devise::SessionsController.layout "application"
Devise::RegistrationsController.layout "application"
Devise::Registrations ...
install django for windows
step1: download python from https://www.python.org/downloads/windows/
download django from https://www.djangoproject.com/download/
step2: install python and configuration environment variable
for example: add 'G: ...
Install ChromeDriver in Linux Mint
1. Install unzip
sudo apt-get install unzip
2. Download last version of ChromeDriver and unzip it
wget -N http://chromedriver.storage.googleapis.com/2.9/chromedriver_linux64.zip -P ~/Downloads
unzip ~/Downloads/chromedriver_l ...
SET:
1. run: sudo vi ./.bashrc
2. set: alias s_yes='yes'
alias s_banner='banner'
alias s_ddate='ddate'
alias s_fortune='fortune'
alias s_fortune_zh='fortune-zh'
alias s_cal='cal 9 1752'
alias s_xev='xev'
...
reinstall mysql in linux
删除 mysql
sudo apt-get autoremove --purge mysql-server-5.0sudo apt-get remove mysql-serversudo apt-get autoremove mysql-serversudo apt-get remove mysql-common //这个很重要上面的其实有一些是多余的。
清理残留数据dpkg -l |grep ^rc|awk '{print $2}' |sudo xargs dpkg -P安装 mysqlsudo apt-get install ...
linux change source
- 博客分类：
- linux
linux change source
Change source before bundle :
gem source -r http://rubygems.org/ #remove source: http://rubygems.org/gem source -a http://ruby.taobao.org #add source: http://ruby.taobao.org
Other sources for linux :
target file: /etc/apt/sources.list
sources list:
...
solve the problem about can not find mysqlclient :
the tips:
----------------------------------------------------------------------------------------------------------------------
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/usr/local/rvm/rubies/ ...
#google dns list
74.125.21.98 0.docs.google.com
74.125.21.98 0.drive.google.com
74.125.21.98 1.docs.google.com
74.125.21.98 1.drive.google.com
74.125.21.98 10.docs.google.com
74.125.21.98 10.drive.google.com
74.125.21.98 11.docs.google.com
74.125.21.98 11.drive.googl ...
thin for rails
- 博客分类：
- gem
in your Gemfile
group :test ,:development do
gem 'thin'
end
what is the thin?
它是一个尚处于实验阶段的ruby web服务器，号称比Mongrel更快