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load and execute order of scripts
...cript has been loaded and executed.
To test this fact:
// file: test.php
sleep(10);
die("alert('Done!');");
// HTML file:
<script type="text/javascript" src="test.php"></script>
Dynamically added scripts are executed as soon as they are appended to the document.
To test this fact:
...
Difference between reduce and foldLeft/fold in functional programming (particularly Scala and Scala
...If you run sc.makeRDD(0 to 9, 2).mapPartitions(it => { java.lang.Thread.sleep(new java.util.Random().nextInt(1000)); it } ).map(_.toString).fold("")(_ + _) with 2+ cores several times, I think you will see it produces random (partition-wise) order. I've updated my answer accordingly.
...
Getting started with Haskell
...k in. This comes through use, but also through time. I find that sometimes sleeping on a problem helps more than anything else! Eventually, the idea will click, and you will wonder why you struggled to understand a concept that in reality is incredibly simple. It is awesome when this happens, and wh...
Regex Pattern to Match, Excluding when… / Except between
... Yes, got carried away writing last night and wrote at the bottom that I'd sleep on it and tidy up later. :) Yes the trick is simple but I don't share your perception that it is "basic" because it doesn't seem to be part of the common tools people use to solve exclusion problems. When I googled for ...
一个故事告诉你比特币的原理及运作机制 - 创意 - 清泛网 - 专注C/C++及内核技术
...样子，各个字段的意义后面会说到
编码生成器（哈希函数）。中本聪又向矿工组织的每个组分发了若干编码生成器，这个东西很神奇，将一页账簿填好内容的账簿纸放入这个机器，机器会在账簿纸的“本账单编号”一栏自动...
Hidden Features of MySQL
...--------+------------------+
| 1 | root | localhost:32893 | NULL | Sleep | 0 | | NULL |
| 5 | system user | | NULL | Connect | 98 | Waiting for master to send event | NULL |
| 6 | system user | ...
Does PHP have threading?
...$t->start()){
while($t->isRunning()){
echo ".";
usleep(100);
}
$t->join();
}
For linux there is an installation guide right here at stackoverflow's.
For windows there is one now:
First you need the thread-safe version of php.
You need the pre-compiled versio...
Context switches much slower in new linux kernels
...e light:
strace -r ./test_latency 0 1 &> test_latency_strace & sleep 8 && killall test_latency
then
for i in futex nanosleep rt_sig;do echo $i;grep $i test_latency_strace | sort -rn;done
which will show the microseconds taken for the interesting system calls, sorted by time....
How to determine CPU and memory consumption from inside a process?
... at /proc/self/status, which looks like this:
Name: whatever
State: S (sleeping)
Tgid: 19340
Pid: 19340
PPid: 19115
TracerPid: 0
Uid: 0 0 0 0
Gid: 0 0 0 0
FDSize: 256
Groups: 0 1 2 3 4 6 10 11 20 26 27
VmPeak: 676252 kB
VmSize: 651352 kB
...
廉价共享存储解决方案1-drbd+ha+nfs - 更多技术 - 清泛网 - 专注C/C++及内核技术
...mp
测试成功.
3.10手动修复裂脑问题
问题描述：模拟主节点网络断开，辅节点将会转换角色到Primay。之后恢复主节点网
络，裂脑问题出现，原因是DRBD检测到两台服务器都为Primary。
主节点/proc/drbd文件...