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为AppInventor2开发拓展(Extension) · App Inventor 2 中文网

...能够搞得定的,加油~ 如果在编译或开发过程中遇到任何问题,欢迎来社区发帖讨论。 切换 目录 官方 QQ群 免费技术交流群483928335 在线 客...
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MySQL ON DUPLICATE KEY - last insert id?

...le (a) VALUES (0) ON DUPLICATE KEY UPDATE id=LAST_INSERT_ID(id), a=1 Is all here: http://dev.mysql.com/doc/refman/5.0/en/insert-on-duplicate.html If a table contains an AUTO_INCREMENT column and INSERT ... UPDATE inserts a row, the LAST_INSERT_ID() function returns the AUTO_INCREMENT value. If t...
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How can I change a file's encoding with vim?

...r just to do encoding conversion seems like using too big hammer for too small nail. Just: iconv -f utf-16 -t utf-8 file.xml > file.utf8.xml And you're done. share | improve this answer ...
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How to Flatten a Multidimensional Array?

Is it possible, in PHP, to flatten a (bi/multi)dimensional array without using recursion or references? 29 Answers ...
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How to get HTTP Response Code using Selenium WebDriver

... the response code of a http request using Selenium and Chrome or Firefox. All you have to do is start either Chrome or Firefox in logging mode. I will show you some examples below. java + Selenium + Chrome Here is an example of java + Selenium + Chrome, but I guess that it can be done in any lang...
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PHP cURL vs file_get_contents

... @velop: Yes. And method, too. And redirects. And timeout... php.net/manual/en/context.http.php – Sz. Mar 28 '18 at 19:54 ...
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How to get the current taxonomy term ID (not the slug) in WordPress?

... If you are in taxonomy page. That's how you get all details about the taxonomy. get_term_by( 'slug', get_query_var( 'term' ), get_query_var( 'taxonomy' ) ); This is how you get the taxonomy id $termId = get_term_by( 'slug', get_query_var( 'term' ), get_query_var( 'taxo...
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What is the most efficient/elegant way to parse a flat table into a tree?

... Now that MySQL 8.0 supports recursive queries, we can say that all popular SQL databases support recursive queries in standard syntax. WITH RECURSIVE MyTree AS ( SELECT * FROM MyTable WHERE ParentId IS NULL UNION ALL SELECT m.* FROM MyTABLE AS m JOIN MyTree AS t ON m.ParentI...
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Dokan虚拟磁盘开发实战 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术

...在DeleteDirectory里实现删除目录的同步),而删除文件则没问题。 这里有一点需要注意:因为执行Cleanup之前,可能会多次调用CreateFile,比如记事本保存文档时就会执行两次CreateFile之后再调用Cleanup,所以我在Cleanup的最后执行MySet...
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Determine if variable is defined in Python [duplicate]

...ime? This is not always obvious because (1) the variable could be conditionally set, and (2) the variable could be conditionally deleted. I'm looking for something like defined() in Perl or isset() in PHP or defined? in Ruby. ...