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互联网运营人员必备的12款工具 - 资讯 - 清泛网 - 专注C/C++及内核技术
...知识是非常必要的。下面就根据运营中的主要工作内容，分享一些常用的工具和网站，它们涵盖运营工作的方方面面，希望对从事产品运营工作的朋友有所帮助。1. H5页面制作工具
易企秀
H5页面是目前非常流行的传播工具，...
Printing the last column of a line in a file
...ile and only then show the last line:
awk '/A1/ {print $NF}' file | tail -n1
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怎么往SetTimer的回调函数传递参数 - C/C++ - 清泛网 - 专注C/C++及内核技术
...马上就能处理完并返回，这个消息队列我们把它叫做消息分发队列或者简称分发队列用来与系 统的消息队列区分，注意分发队列里面的消息都是已经格式化后的消息，分发给谁呢？当然是分发给消息的回调函数了，对于有窗口...
Objective-C 2.0 Mac和iOS开发实践指南 PDF扫描版 - 文档下载 - 清泛网 - ...
...程序员量身打造。《Objective-C 2.0 Mac和iOS开发实践指南》分为四部分。第一部分介绍学习0bjective-c编程所需的c语言基础知识。第二部分介绍ObjectiVe-c编程的核心知识，包括消息机制、类和对象、类对象等。第三部分介绍ObjectiVe-c中...
Grep only the first match and stop
...ure grep don't buffer its output:
stdbuf -oL grep -rl 'pattern' * | head -n1
stdbuf -oL grep -o -a -m 1 -h -r "Pulsanti Operietur" /path/to/dir | head -n1
stdbuf -oL grep -nH -m 1 -R "django.conf.urls.defaults" * | head -n1
As soon as head consumes 1 line, it terminated and grep will receive SIGP...
Generating random number between 1 and 10 in Bash Shell Script [duplicate]
...l which allows you to directly specify ranges, like gnu shuf
shuf -i1-10 -n1
If you want to use $RANDOM, it would be more precise to throw out the last 8 numbers in 0...32767, and just treat it as 0...32759, since taking 0...32767 mod 10 you get the following distribution
0-8 each: 3277
8-9 eac...
MongoDb query condition on comparing 2 fields
...lient().test_db.grades
coll.insert_many(docs)
Using aggregate:
%timeit -n1 -r1 list(coll.aggregate([
{
'$project': {
'diff': {'$subtract': ['$Grade1', '$Grade2']},
'Grade1': 1,
'Grade2': 1
}
},
{
'$match': {'diff': {'$gt': 0}...
Is it possible to send an array with the Postman Chrome extension?
...tion:
use form-data and edit as below:
Key Value
box[] a
box[n1] b
box[n2][] c
box[n2][] d
and you will get an array like this:
{"box":{"0":"a","n1":"b","n2":["c","d"]}}
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浅谈APM在电子交易系统中的应用 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...菜一把抓都成解决问题的常态了
4、这套系统最大支持多少个用户同时访问？保持最佳访问效果的时候能支持多少用户
第一步，压测前端的WEB，同时查看各个服务器资源的利用率
第二步，压测中间件，同时查看各个服务器...
How do you uninstall all dependencies listed in package.json (NPM)?
... answered Aug 16 '16 at 10:47
y0n1y0n1
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