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How to convert variable (object) name into String [duplicate]

... substitute to get the name of a function argument: myfunc <- function(v1) { deparse(substitute(v1)) } myfunc(foo) [1] "foo" share | improve this answer | follow ...
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项目管理实践【六】自动同步数据库【Using Visual Studio with Source Cont...

...tartKitDB\$(DBFiles)" /> <!--复制最新版本的数据库文件到指定位置--> <Copy SourceFiles="@(DBFiles)" DestinationFolder="C:\StartKitDB" /> <!--启动SqlServer服务--> <ServiceController ServiceName="mssqlserver" Action="Start" /> <!--附加复制过来的最新版本的数据库...
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What are the details of “Objective-C Literals” mentioned in the Xcode 4.4 release notes?

..., nil] [array objectAtIndex:i] [NSDictionary dictionaryWithObjectsAndKeys: v1, k1, v2, k2, nil]; [dictionary valueForKey:k] @[a, b, c] array[i] @{k1:v1, k2:v2} dictionary[k] This part is new. Expression Literals When you have an expression (M_PI / 16 for example) you should put it insid...
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Floating point vs integer calculations on modern hardware

... ++i below on measurements Type v0 = (Type)(rand() % 256)/16 + 1; Type v1 = (Type)(rand() % 256)/16 + 1; Type v2 = (Type)(rand() % 256)/16 + 1; Type v3 = (Type)(rand() % 256)/16 + 1; Type v4 = (Type)(rand() % 256)/16 + 1; Type v5 = (Type)(rand() % 256)/16 + 1; Type v6 = (Type)(rand() %...
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开源MQTT网关:EMQX vs Mosquitto - 创客硬件开发 - 清泛IT社区,为创新赋能!

...协议轻量高效积极的社区支持 缺点:可扩展性有限(&lt;100k)没有集群支持缺少企业功能有限的云原生支持 EMQX 简介EMQX 项目于 2012 年底在 Github 发布,许可证为 Apache2,如今已成为世界上最具扩展性的 MQTT 消息服务器,被广泛...
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二维码的生成细节及原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...码有残缺还能扫出来,也就是为什么有人在二维码的中心位置加入图标。 错误修正容量 L水平 7%的字码可被修正 M水平 15%的字码可被修正 Q水平 25%的字码可被修正 H水平 30%的字码可被修正 ...
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深入理解 x86/x64 的中断体系 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术

...间低端,实际上等于 ROM 被映射到地址空间最高端和低端位置。 此时在系统的内存里其实并不存在 BIOS 代码,ROM BIOS 的一部分职责是负责安装 BIOS 代码进入系统内存。 jmp far f000:e05b 典型是这条指令就是 0xFFFFFFF0 处...
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HTML table with 100% width, with vertical scroll inside tbody [duplicate]

How can I set for &lt;table&gt; 100% width and put only inside &lt;tbody&gt; vertical scroll for some height? 13 Answer...
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App Inventor 2 SideBarV2 侧边栏拓展 · App Inventor 2 中文网

...。 事件 AfterSelecting选中菜单项后(位置,菜单项,图标名) 在菜单中选中某一项后触发。 拓展下载 .aix 拓展下载: co.com.dendritas.SidebarV2.zip co.com.dendritas.SidebarV2.aix 版权信息 ...
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How do I import a specific version of a package using go get?

...versions as repo urls, without actually creating repos. E.g. gopkg.in/yaml.v1 vs gopkg.in/yaml.v2, even though they both live at https://github.com/go-yaml/yaml gopkg.in/yaml.v1 redirects to https://github.com/go-yaml/yaml/tree/v1 gopkg.in/yaml.v2 redirects to https://github.com/go-yaml/yaml/tree/...