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Regular expression to match DNS hostname or IP Address?
...mes only (and not intranet), I wrote the following snipped, a mix of shell/php but it should be applicable as any regular expression.
first go to ietf website, download and parse a list of legal level 1 domain names:
tld=$(curl -s http://data.iana.org/TLD/tlds-alpha-by-domain.txt | sed 1d | cut ...
大家在搜什么：搜索需求成品专题（附 .aia 源码，持续更新） · App Inventor 2 中文网
...支持重启恢复，页面里摘出核心代码讲清思路，并附常见问题。其余搜索在下方「搜索词速查」里直接指到已有教程。
下载全部 .aia（zip） 验证记录
第 1 期 · 2026 年 10 月
本期导出明细为 941 行，大小写合并...
What is the difference between square brackets and parentheses in a regex?
...uestion uses keyword var in code, this probably is JavaScript). The use of php which runs on PCRE for preg matching will optimize away the lack of backtracking, however we're not in PHP either, so using classes [] instead of alternations | gives performance bonus as the match does not backtrack, and...
Is this a “good enough” random algorithm; why isn't it used if it's faster?
...have distinctly un-uniform output.
Inspired by this article about how bad php's rand() function is, I made some random matrix images using QuickRandom and System.Random. This run shows how sometimes the seed can have a bad effect (in this case favouring lower numbers) where as System.Random is pret...
Sorting an IList in C#
...his question inspired me to write a blog post: http://blog.velir.com/index.php/2011/02/17/ilistt-sorting-a-better-way/
I think that, ideally, the .NET Framework would include a static sorting method that accepts an IList<T>, but the next best thing is to create your own extension method. It's...
How do I create a parameterized SQL query? Why Should I?
...ple would do this through a server side programming language library, like PHP's PDO or Perl DBI.
For instance, in PDO:
$dbh=pdo_connect(); //you need a connection function, returns a pdo db connection
$sql='insert into squip values(null,?,?)';
$statement=$dbh->prepare($sql);
$data=array('my...
App Inventor 2 构建苹果 iOS App · App Inventor 2 中文网
...门户中，前往“证书、配置文件和设备”部分。如遇账户问题可参考这里。
选择“证书”，然后点击“+”按钮以创建新证书。
当系统提示您选择所需的证书类型时，请选择“Apple Distribution”，然后点击“继续”。
在下...
Convert PDF to clean SVG? [closed]
...the reason I want this is because I want to be able to edit the text using PHP. I could do it directly with PDF, but PDF can't be inlined easily into HTML, but SVG can. I may just stick with PDF and convert it to JPG in PHP after editing it's values..
– DanRedux
...
What is this Javascript “require”?
...
The equivalent in PHP would be include/require[_once] (php.net link), not use, which is an aliasing keyword.
– nevvermind
Apr 2 '19 at 12:39
...
py2exe - generate single executable file
...allable program.
I have used InnoSetup ( http://www.jrsoftware.org/isinfo.php ) with delight for several years and for commercial programs, so I heartily recommend it.
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