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App Inventor 2 UrsAI2UDP 拓展 - UDP广播通信协议 · App Inventor 2 中文网
...设备标识符。然后，接收器会过滤掉它感兴趣的设备。
问题是：App Inventor 没有内置 UDP，而且我找不到可用的扩展。所以自己动手吧。
注意：
如果智能手机和远程站位于同一个（本地）网络中，则扩展可以完美运行。如果智...
开源跳板机(堡垒机)Jumpserver v2.0.0 使用说明 - 开源 & Github - 清泛网 ...
...户信息，删除用户，回收权限没有讲解，自己试试吧，有问题可以群里讨论，Jumpserver是一个年轻的项目，可能存在一些BUG，需要您的及时反馈，帮助我们一起完善项目！
本文出自 “Free Linux, Share Linux” 博客，请务必保留此...
Regular expression for a hexadecimal number?
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If you're using Perl or PHP, you can replace
[0-9a-fA-F]
with:
[[:xdigit:]]
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Microsoft Excel mangles Diacritics in .csv files?
I am programmatically exporting data (using PHP 5.2) into a .csv test file.
Example data: Numéro 1 (note the accented e).
The data is utf-8 (no prepended BOM).
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How do I find out what version of WordPress is running?
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Look in wp-includes/version.php
/**
* The WordPress version string
*
* @global string $wp_version
*/
$wp_version = '2.8.4';
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Fastest sort of fixed length 6 int array
...static int seed = 76521;
while (n--) *a++ = (seed = seed *1812433253 + 12345);
}
#define NTESTS 4096
int main() {
int i;
int d[6*NTESTS];
ran_fill(6*NTESTS, d);
unsigned long long cycles = rdtsc();
for (i = 0; i < 6*NTESTS ; i+=6) {
sort6_fast(d+i);
}
cyc...
Why is textarea filled with mysterious white spaces?
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Open (and close!) your PHP tags right after, and before, your textarea tags:
<textarea style="width:350px; height:80px;" cols="42" rows="5" name="sitelink"><?php
if($siteLink_val) echo $siteLink_val;
?></textarea>
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What is the coolest thing you can do in
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PHP - the Sierpinski gasket a.k.a the Triforce
OK, it's 15 lines of code but the result is awesome! That's the kind of stuff that made me freak out when I was a child. This is from the PHP manual:
$x = 200;
$y = 200;
$gd = i...
ComponentGroup 组件组扩展：监控内容变化和批量启用禁用组件 · App Inventor 2 中文网
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ComponentGroup 扩展解决了 App Inventor 中的两个常见问题：
内容变化检测：无需使用复杂的定时器和值比较即可检测组件内容是否被修改
批量启用/禁用：一次性启用或禁用一组组件（例如在考试期间禁用输入区域）
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Example invalid utf8 string?
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In PHP:
$examples = array(
'Valid ASCII' => "a",
'Valid 2 Octet Sequence' => "\xc3\xb1",
'Invalid 2 Octet Sequence' => "\xc3\x28",
'Invalid Sequence Identifier' => "\xa0\xa1",
'Valid 3 Octet Sequ...