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使用虚拟现实和App Inventor进行实验 · App Inventor 2 中文网
...们不应该忘记活动的生命周期，以及在活动被销毁时清理资源的需要：
@Override
protected void onPause() {
panorama.pauseRendering();
super.onPause();
}
@Override
protected void onResume() {
super.onResume();
panorama.resumeRendering();
}
@Override
p...
Test whether a glob has any matches in bash
... possibility of overstuffing the expanded command line (some shells have a 4K length limit).
If find feels like overkill and the number of files likely to match is small, use stat:
if stat -t glob* >/dev/null 2>&1
then
echo found
else
echo not found
fi
...
FloatingActionButton 扩展：悬浮操作按钮扩展，可自定义颜色、大小、位置...
...
❌ 不支持
图标设置
文件路径
资源名称
功能复杂度
功能丰富
简洁实用
选择建议：
选择 FloatingActionButton：需要精确定位、多按钮管理、圆角控制或临时隐藏等高级功能
...
Growing Amazon EBS Volume sizes [closed]
...new_desc_blocks = 2
Performing an on-line resize of /dev/xvdf1 to 5242624 (4k) blocks.
The filesystem on /dev/xvdf1 is now 5242624 blocks long.
ubuntu@ip-xxxxxxx:~$
Done! Use df -h to verify the new size.
share
...
C fopen vs open
...ts, fgetc, fscanf, fread) , will always read the whole size of the buffer (4K, 8K or whatever you set). By using the direct I/O you can avoid that. In that case it's even better to use pread instead of a seek/read pair (1 syscall instead of 2).
– Patrick Schlüter
...
Boost.Asio的简单使用(Timer,Thread,Io_service类) - C/C++ - 清泛网 - 专注C/C++及内核技术
...发执行.所以,当回调函数需要访问一个共享,线程不安全的资源时,我们需要一种方式来同步操作.
#include <iostream>
#include <boost/asio.hpp>
#include <boost/thread.hpp>
#include <boost/bind.hpp>
#include <boost/date_time/posix_time/posix_time.hpp>
在上一节...
How to keep indent for second line in ordered lists via CSS?
...osition: absolute on the generated content. See jsfiddle.net/maryisdead/kgr4k for an example.
– maryisdead
Apr 24 '14 at 8:54
2
...
OpenSSH升级后不能登录的问题 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...没升级过的配置文件sshd_config拷贝到本机，不行
寄出百度 http://bbs.51cto.com/thread-1098820-1.html
按照这个说法
修改配置文件后，发现还是不行，于是重启服务器，居然报错，起不来
妹的一个问题没有解决又来一个问题
...
Comparing two dictionaries and checking how many (key, value) pairs are equal
...
@THC4k, sorry for not mentioning. But I have to check how many values match in both the dictionaries.
– user225312
Dec 24 '10 at 19:13
...
OceanBase使用libeasy原理源码分析：服务器端 - 数据库(内核) - 清泛网 - ...
...种模式)
五、 异步处理(OceanBase大量采用这种模式)
六、 资源管理
一、OceanBase启动时的使用模式
libeasy内与OceanBase使用模式相关的各个对象之间关系如下图所示：
OceanBase主要用到的是libeasy的IO线程池部分，没有用到libeasy...