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优惠券批量生成及导入的思路 - 闲聊区 - 清泛IT论坛,有思想、有深度

...;$n = mt_rand(0, PHP_INT_MAX);         $m = base_convert($m, 10, 36);  // 主随机         $n = base_convert($n, 10, 36);  // 辅随机         $r = substr($m . $n, 0, 16);     ...
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AppInventor2 二进制文件的读写 - App Inventor 2 中文网 - 清泛网 - 专注C/C++及内核技术

...:如果想要保存二进制到文件,可以考虑转换成 ascii 或 base64 化,然后通过文件管理器保存为文件,具体请帮助,...蓝牙客户端或 ble 都可以接收二进制数组,返回的数据是列表: 如果想要保存二进制到文件,可以考虑转换...
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App Inventor 2 人脸识别App开发 - 第三方API接入的通用方法 · App Inventor 2 中文网

...“组件调用第三方API,代码如下: 注:这里图片采用Base64的方式,压缩后进行Base64编码。用到 SimpleBase64 拓展 和 TaifunImage 拓展。 JSON结果的解析 aia源码 通过上面的步骤拆解及代码块参考,相信你一定能够完成基本功能的...
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【拍照图片处理】Attempt to invoke virtual method 'boolean android.grap...

...erence 图片大致的处理流程是:先TaifunImage压缩尺寸,在Base64化,调在线api进行识别。 通过调试发现问题是出现在 图片的Resize/Base64化的步骤上,看报错是图片对象为空导致的。 参考了一些英文资料,大致可能原因有:图...
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How to find difference between two Joda-Time DateTimes in minutes

...d will need to compute the amount of time between now and some future time based on a date from another time zone. I will report back what I find. – Doo Dah Apr 21 '16 at 1:29 2 ...
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What is the purpose of a stack? Why do we need it?

...rand addresses and a result address is going to be enormous. We use stack-based opcodes because stacks solve the common problem. Namely: I want to allocate some temporary storage, use it very soon and then get rid of it quickly when I'm done. By making the assumption that we have a stack at our dis...
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MySQL - why not index every field?

... and also every index takes some database space – Acanthus Mar 26 '11 at 23:33 @...
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RESTful Authentication

...d software architecture. HTTP basic auth over HTTPS This first solution, based on the standard HTTPS protocol, is used by most web services. GET /spec.html HTTP/1.1 Host: www.example.org Authorization: Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ== It's easy to implement, available by default on all browse...
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Nohup is not writing log to output file

... python as well as other C stdio-based programs uses line-buffering in interactive case (stdout is connected to a tty) and block-buffering when redirected to a file. If python -u doesn't work; nohup might have introduced its own buffering. ...
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What is the gain from declaring a method as static

...inally better at most, since the code does not need to do dynamic dispatch based on the type. However, a much stronger argument against refactoring into static methods is that currently using static is considered bad practice. Static methods / variables do not integrate well into an object oriente...