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社会化海量数据采集爬虫框架搭建 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...统都可能出问题，如果对方服务器宕机、网页改版、更换地址等我们需要第一时间知道，这时监控系统就起到出现了问题及时发现并通知联系人。
目前这样的框架搭建起来基本可以解决大量的抓取需求了。通过界面可以管理...
How to remove non-alphanumeric characters?
...3-+=öäå'); // abc123öäå
preg_replace('/[^\p{L}\p{N} ]+/', '', '你好世界!@£$%^&*()'); // 你好世界
Note: This is a very old, but still relevant question. I am answering purely to provide supplementary information that may be useful to future visitors.
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How to map atan2() to degrees 0-360
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Solution using Modulo
A simple solution that catches all cases.
degrees = (degrees + 360) % 360; // +360 for implementations where mod returns negative numbers
Explanation
Positive: 1 to 180
If you mod any positive number between 1 a...
Using forked package import in Go
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If you are using go modules. You could use replace directive
The replace directive allows you to supply another import path that might
be another module located in VCS (GitHub or elsewhere), or on your
local filesystem with a relative or...
Difference between the Apache HTTP Server and Apache Tomcat? [closed]
...'t Tomcat also serving (hypertext aka) HTTP? Why can't Tomcat simply be a "mod_java" Apache module? Can you explain?
– Peterino
Jan 19 '12 at 9:09
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Remove .php extension with .htaccess
...in the Stack Overflow question How to hide the .html extension with Apache mod_rewrite should work fine.
Re 1) Change the .html to .php
Re a.) Yup, that's possible, just add #tab to the URL.
Re b.) That's possible using QSA (Query String Append), see below.
This should also work in a sub-directo...
Length of an integer in Python
...}".format(i).split("e")[1]) + 1 # e.g. `1e10` -> `10` + 1 -> 11
def mod_size(i):
return len("%i" % i) # Uses string modulo instead of str(i)
def fmt_size(i):
return len("{0}".format(i)) # Same as above but str.format
(the libc function requires some setup, which I haven't included)...
App Inventor 2 UrsAI2UDP 拓展 - UDP广播通信协议 · App Inventor 2 中文网
...选择了 MIT App Inventor 2。
项目中可用的 ESP8266 设备的 IP 地址不应固定。应用程序本身应该确定哪些设备当前处于活动状态以及可以从哪些地址寻址它们。
要完成此任务（名称服务），您可以使用 UDP 的广播功能。您只需将广播...
一个自媒体的运营手记：我做公众号已经两年多了 - 资讯 - 清泛网 - 专注C/C...
...，它的阅读量没有水分，因为这些用户基本上都是通过看我的文章后，关注来的。这个是一件非常困难的事情，因为看文章的人，大多数是不会关注公众号的，除非是特别有需求，或者特别认可文章才会加公众号，因为现在公众...
Add alternating row color to SQL Server Reporting services report
...nd choose "Expression..."
Use this expression:
= IIf(RowNumber(Nothing) Mod 2 = 0, "Silver", "Transparent")
This trick can be applied to many areas of the report.
And in .NET 3.5+ You could use:
= If(RowNumber(Nothing) Mod 2 = 0, "Silver", "Transparent")
Not looking for rep--I just research...