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区块链技术到底是什么鬼，为何被疯炒？ - 资讯 - 清泛网 - 专注C/C++及内核技术
...节点都可以扮演“监督者”的身份，因此不用担心欺诈的问题。可扩展：区块链是一种底层开源技术，在此基础上可以实现各类扩展和去中心化、去信任化的应用。匿名化：数据交换的双方可以是匿名的，网络中的节点无需知道...
How to validate a url in Python? (Malformed or not)
...t work for IPv6 urls, which have the form http://[2001:0DB8::3]:8080/index.php?valid=true#result
– cimnine
Feb 4 '18 at 20:42
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array_push() with key value pair
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"dog" => "cat"
];
array_push($data, ['cat' => 'wagon']);
*In php 7 and higher, array is creating using [], not ()
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Conditional HTML Attributes using Razor MVC3
...on, and one users named himself '/><script>$.post('changepassword.php?password=123')</script> and now any other user who views this page has their password instantly changed to a password that the malicious user knows.
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How to ignore files which are in repository?
I have a file (config.php), that is already commited to Git repository, but I want to ignore locally, i.e. I want that file to remain in repository, but force Git to ignore any changes to it.
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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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typecast string to integer - Postgres
...ing into an integer.
Solution
Create a user-defined function inspired by PHP's intval() function.
CREATE FUNCTION intval(character varying) RETURNS integer AS $$
SELECT
CASE
WHEN length(btrim(regexp_replace($1, '[^0-9]', '','g')))>0 THEN btrim(regexp_replace($1, '[^0-9]', '','g'))::intege...
实时开发、测试和调试工具 · App Inventor 2 中文网
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Android 日志和 adb（高级）
如果你在 Android 设备上遇到问题，有时可以通过检查 Android 日志来获取信息。 例如，如果你的应用程序空间不足，则会记录在日志中。 日志中的消息通常难以理解，但是你可以使用通知程序组件使你...
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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How to find my Subversion server version number?
...>
<body>...
<address>Apache/2.2.11 (Debian) DAV/2 SVN/1.5.6 PHP/5.2.9-4 ...</address>
</body></html>
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