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app inventor什么时候需要用到字典块？ - App Inventor 2 中文网 - 清泛网 ...
app inventor什么时候需要用到字典块？列表能完成字典的绝大部分功能，不过字典具有比列表更好的查找性能，因此如果要对数据结构执行大量的操作，建议优先使用字典。更多用法请查看文档：https: www fun123 cn referen 列表能完...
What does it mean in shell when we put a command inside dollar sign and parentheses: $(command)
...
DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
Could anybody help me to figure out how this command get executed?
Let's look at different parts of the command. BASH_SOURCE is a bash array variable containing ...
How to pass command line arguments to a shell alias? [duplicate]
...
You cannot in ksh, but you can in csh.
alias mkcd 'mkdir \!^; cd \!^1'
In ksh, function is the way to go. But if you really really wanted to use alias:
alias mkcd='_(){ mkdir $1; cd $1; }; _'
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How to convert a normal Git repository to a bare one?
...it is now a bare repository.
To do this, execute the following commands:
cd repo
mv .git ../repo.git # renaming just for clarity
cd ..
rm -fr repo
cd repo.git
git config --bool core.bare true
Note that this is different from doing a git clone --bare to a new location (see below).
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Ubuntu rails install fails on zlib
...e distro is ruby-1.9.2-p0. After I unpacked it, I built zlib as follows:
cd ruby-1.9.2-p0/ext/zlib
ruby extconf.rb
make
sudo make install
sudo gem install rails
that fixed the problem. This is similar to what other people posted above, but not exactly, so I figured I may as well post exactly wh...
How do you normalize a file path in Bash?
...f there is a direct bash command to do this, but I usually do
normalDir="`cd "${dirToNormalize}";pwd`"
echo "${normalDir}"
and it works well.
share
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How to duplicate a git repository? (without forking)
...cate, you need to perform both a bare-clone and a mirror-push:
mkdir foo; cd foo
# move to a scratch dir
git clone --bare https://github.com/exampleuser/old-repository.git
# Make a bare clone of the repository
cd old-repository.git
git push --mirror https://github.com/exampleuser/new-repository....
国务院常务会议“大数据” - 资讯 - 清泛网 - 专注C/C++及内核技术
...家对本报表示，百次常务会议既有聚焦又注重全面，体现了政府集中发力和重点兜底的思路。目前来看，简政放权、创业创新、财税金融改革等主题，不仅已经成为新的政经热词，也凸显出在经济和社会发展转型中政府面临的挑...
How do I use su to execute the rest of the bash script as that user?
...name and a project. The script is supposed to switch (su) to the username, cd to a specific directory based upon the project string.
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How do I run a rake task from Capistrano?
...cap staging rake:invoke task=a_certain_task
task :invoke do
run("cd #{deploy_to}/current; /usr/bin/env rake #{ENV['task']} RAILS_ENV=#{rails_env}")
end
end
Then, from /rails_root/, you can run:
cap staging rake:invoke task=rebuild_table_abc
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