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构建高并发高可用的电商平台架构实践 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...到。RabbitMQ解决方案中有普通的集群和可用性更高的mirror queue方式。 kafka采用zookeeper对集群中的broker、consumer进行管理，可以注册topic到zookeeper上；通过zookeeper的协调机制，producer保存对应topic的broker信息，可以随机或者轮询发送...
java.io.Console support in Eclipse IDE
...Main.java
1. Start the JVM Console in Debug Mode
debug.bat is a Windows batch file that should be run externally from a cmd.exe console.
@ECHO OFF
SET A_PORT=8787
SET A_DBG=-Xdebug -Xnoagent -Xrunjdwp:transport=dt_socket,address=%A_PORT%,server=y,suspend=y
java.exe %A_DBG% -cp .\bin Main
In th...
How to check for an active Internet connection on iOS or macOS?
... Update the UI on the main thread
dispatch_async(dispatch_get_main_queue(), ^{
NSLog(@"Yayyy, we have the interwebs!");
});
};
// Internet is not reachable
internetReachableFoo.unreachableBlock = ^(Reachability*reach)
{
// Update the UI on the mai...
How do I get a background location update every n minutes in my iOS application?
...lly finishes at around the same time.
dispatch_async(dispatch_get_main_queue(), ^{
if (bgTask != UIBackgroundTaskInvalid)
{
[app endBackgroundTask:bgTask];
bgTask = UIBackgroundTaskInvalid;
}
});
}];
// Start the long-running task and return ...
From ND to 1D arrays
...mplest way is to use flatten(), like this example :
import numpy as np
batch_y =train_output.iloc[sample, :]
batch_y = np.array(batch_y).flatten()
My array it was like this :
0
0 6
1 6
2 5
3 4
4 3
.
.
.
After using flatten():
array([6, 6, 5, ..., 5, 3, 6])
It's also the ...
How to only get file name with Linux 'find'?
...basename takes only 1 path argument but xargs will send them all (actually 5000) without -n1. does not work on linux and openbsd, only macOS...)
Some bigger numbers from a linux system to see how -execdir helps, but still much slower than a parallel xargs:
$ alias f='time find /usr/ -maxdepth 5 -...
JavaScript before leaving the page
...site? Changes you made may not be saved.
– programmer5000
Jan 25 '17 at 18:47
6
...
Convert a Git folder to a submodule retrospectively?
...MMIT`)
pathcheck=(`printf "%s:$subdir\\n" ${fam[@]} \
| git cat-file --batch-check='%(objectname)' | uniq`)
[[ $pathcheck = *:* ]] || {
subfam=($( set -- ${fam[@]}; shift;
for par; do tpar=`map $par`; [[ $tpar != $par ]] &&
git rev-parse -q --verify $tpar:"$subdir...
Generate C# class from XML
... answered Nov 17 '10 at 10:45
ng5000ng5000
11.1k1010 gold badges4545 silver badges6363 bronze badges
...
fastest (low latency) method for Inter Process Communication between Java and C/C++
...er exploration of using memory mapped file as shared memory to support IPC queue in Java: psy-lob-saw.blogspot.com/2013/04/lock-free-ipc-queue.html achieving 135M messages a second. Also see my answer below for comparative study of latency by method.
– Nitsan Wakart
...