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App Inventor 2 经典蓝牙(SPP) 硬件接入：hc05 · App Inventor 2 中文网
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HC05 简单介绍
基本接入代码参考
常见问题解决
Error 515: Not connected to a Bluetooth device.
Error 507: unable to connect. is the device turned on?
乱码问题排查思路
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How can I count all the lines of code in a directory recursively?
...ent, add it to one of the initialization files (~/.bashrc, ~/.bash_profile etc.).
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Get first key in a (possibly) associative array?
...just iterates a pointer, similar to using the more low-level next, current etc.
– troelskn
Mar 27 '14 at 8:34
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What is a Python equivalent of PHP's var_dump()? [duplicate]
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What about pprint() on enumerate objects, permutations, etc.?
– JSmyth
Nov 23 '14 at 16:33
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企业级负载平衡简介 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...位读者在评论中提出了如果整个过程速度比较慢登陆会有问题这样一条评论...在之前的一篇文章《放好你的密码 - 从芝麻金融被攻破说起》中，一位读者在评论中提出了“如果整个过程速度比较慢登陆会有问题”这样一条评论。...
PHP DOMDocument loadHTML not encoding UTF-8 correctly
...u have multi-byte characters (such as Chinese, Russian, Arabic, Hebrew, ...etc.)
I recommend reading this article: http://coding.smashingmagazine.com/2012/06/06/all-about-unicode-utf8-character-sets/. You will understand how UTF-8 works and why you have this problem. It will take you about 30 minu...
Get absolute path of initially run script
...nd line, but, a solution should function just as well if run within Apache etc.
15 Answers
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Convert timestamp to readable date/time PHP
...are using PHP date(), you can use this code to get the date, time, second, etc.
$time = time(); // you have 1299446702 in time
$year = $time/31556926 % 12; // to get year
$week = $time / 604800 % 52; // to get weeks
$hour = $time / 3600 % 24; // to get hours
$minute = $time / 60 ...
浅析为什么char类型的范围是 -128~+127 - C/C++ - 清泛网 - 专注C/C++及内核技术
...一本书上（包括老师）也不会给你为什么是-128~127，这个问题貌似看起来也很简单容易， 以至于不用去思考为什么，不是有一个整型范围的公式吗： -2^(n-1)~2^(n-1)-1 n为整型的内存占用位数，所以int类型32位 那么就是 -(2^31)~2^31 -...
Is PHP compiled or interpreted?
... performance penalty as PHP recompiles my source code for every request?", etc.)
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