大约有 8,000 项符合查询结果(耗时:0.0208秒) [XML]

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AppInventor2如何通过socket给网络发16进制数据? - App应用开发 - 清泛I...

...方法,可以赐教吗?软件只能发ASCLL码?没办法收发HEX,蓝牙组件有写字节功能,TCP网络组件没有。 答: 发送文本消息时,hexaStringMode设为 false;发送16制消息时,hexaStringMode设为 true,例如:0x012 —> “303132” 字符串...
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Generate a random alphanumeric string in Cocoa

...yourself to hex characters only, then the simplest option is to generate a UUID: NSString *uuid = [NSUUID UUID].UUIDString; Example output: 16E3DF0B-87B3-4162-A1A1-E03DB2F59654. If you want a smaller random string then you can grab just the first 8 characters. It's a version 4 UUID which means ...
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第一个Hello,OS World操作系统 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术

...输出。 OS本身也是程序,它运行也是如此,开机后从指定地址处(0x7c00),开始执行指令。先看看本节例子最终运行效果: 编译运行环境: nasm:Inter x86汇编编译工具,用户将我们汇编代码编译为二进制。(下载地址...
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Likelihood of collision using most significant bits of a UUID in Java

If I'm using Long uuid = UUID.randomUUID().getMostSignificantBits() how likely is it to get a collision. It cuts off the least significant bits, so there is a possibility that you run into a collision, right? ...
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搭建高可用mongodb集群(四)—— 分片 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...就差那么一点点,一点点。。。 连接在mongos上,准备让指定数据库、指定集合分片生效。 #指定testdb分片生效 db.runCommand( { enablesharding :"testdb"}); #指定数据库里需要分片集合和片键 db.runCommand( { shardcollection : "testd...
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App Inventor 2 中文网 · 项目指南

... 边栏搜索 请输入搜索内容 搜索 边栏菜...
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How to generate a random alpha-numeric string?

...less likely than undetected errors from cosmic rays, etc. Comparison with UUIDs According to their specification, UUIDs are not designed to be unpredictable, and should not be used as session identifiers. UUIDs in their standard format take a lot of space: 36 characters for only 122 bits of entro...
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【客户反馈】增加直接改项目名称功能 - 用户反馈 - 清泛IT社区,为创新赋能!

...有些思路在名字上有体现会比较好。比如我一开始只做了蓝牙模块控制,名字ble,后面又加wifi,项目名称改话就是wifi+ble。 ---------------------- 感谢反馈,采纳此条建议,改名功能推进中,敬请期待!已支持并上线:https://b...
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VC窗口刷新InvalidateRect和UpdateWindow - C/C++ - 清泛网 - 专注C/C++及内核技术

...段是窗口设备环境句柄,rcPaint字段是一个RECT结构,它指定了无效区域矩形对角顶点(如果开始有一个((0,0),(40,40)),现在又来一个((20,20),(60,30)),那么拼接后就是((0,0),(60,40))),fErase字段如果为非零值,表示Windows在发送WM_PAIN...
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[源码实例] c/c++获取网卡mac地址 - C/C++ - 清泛网 - 专注C/C++及内核技术

...of(ncb) ); ncb.ncb_command = NCBRESET; ncb.ncb_lana_num = lana_num; // 指定网卡号 // 首先对选定网卡发送一个NCBRESET命令,以便进行初始化 uRetCode = Netbios( &ncb ); memset( &ncb, 0, sizeof(ncb) ); ncb.ncb_command = NCBASTAT; ncb.ncb_lana_num = lana_nu...