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What's the difference between HEAD^ and HEAD~ in Git?
... / ],
F => [ qw/ I J / ],
);
sub postorder {
my($root,$hash) = @_;
my @parents = @{ $parents{$root} || [] };
postorder($_, $hash) for @parents;
return if $sha1{$root};
@parents = map "-p $sha1{$_}", @parents;
chomp($sha1{$root} = `git commit-tree @parents -m "$roo...
Fragment over another fragment issue
...ayoutInflater inflater,ViewGroup container,Bundle savedInstance){
View root = somehowCreateView();
/*here is an implementation*/
root.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
return true;
}
});
...
How do I create a self-signed certificate for code signing on Windows?
...tificates MMC snapin, but from the command line:
certutil -user -addstore Root MyCA.cer
Creating a code-signing certificate (SPC)
makecert -pe -n "CN=My SPC" -a sha256 -cy end ^
-sky signature ^
-ic MyCA.cer -iv MyCA.pvk ^
-sv MySPC.pvk MySPC.cer
It is pretty much th...
MQTT与TCP的区别 - 创客硬件开发 - 清泛IT社区，为创新赋能！
... Maori dictionary)。10. mqtt客户端connect时，可以带有用户名和密码，用于验证客户端。服务端可以根据clientid、IP地址、用户名等进行ACL访问控制。可以通过自定义应用消息实现客户端对服务端的身份验证。11. 有商业和开源的mqtt broke...
MySQL skip first 10 results
Is there a way in MySQL to have the first 10 result from a SELECT query skipped?
I'd like it to work something like LIMIT.
...
多媒体组件 · App Inventor 2 中文网
...帧。
开始()
播放 源文件 指定的媒体。
停止()
重置为视频开始位置，如果视频正在播放则暂停。
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Delete directory with files in it?
...ting /, this would only work if you'd lounch the script in command line as root, because in web everything happens as apache user
– Ben
Jun 27 '14 at 9:40
...
What is an index in SQL?
...
An index is used to speed up searching in the database. MySQL have some good documentation on the subject (which is relevant for other SQL servers as well):
http://dev.mysql.com/doc/refman/5.0/en/mysql-indexes.html
An index can be used to efficiently find all rows matching some c...
How to work with complex numbers in C?
...introduced in mathematics, from the need of calculating negative quadratic roots. Complex number concept was taken by a variety of engineering fields.
Today that complex numbers are widely used in advanced engineering domains such as physics, electronics, mechanics, astronomy, etc...
Real and imag...
Python error “ImportError: No module named”
...at was affecting it was that I had another Python version installed by the root, so if someone is working with a local installation of python, be sure that the Python installation that is running the programs is the local Python. To check this, just do which python, and see if the executable is the ...