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App Inventor 2开发简单计算器 - App Inventor 2 中文网 - 清泛IT论坛,有思想、有深度

...空(“”);当用户输入第一串数字时,我们将这个数字保存在后数中;当用户点击算符键时,我们将算符之前输入的数字,即后数,保存在前数中,并设后数的值为0;(2)创建点击数字过程按照计算器的使用习惯,如果要输...
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LINQPad [extension] methods [closed]

...er than Environment.UserDomainName+@"\"+Environment.UserName. Util.WriteCsv (new: available since LinqPad version v4.45.05 (beta)) Util.WriteCsv (Customers, @"c:\temp\customers.csv"); This will write the content of the table Customers to the CSV file c:\temp\customers.csv. You can also find a...
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Visual SVN 安装及客户端使用 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...启动,就要封装SVN Server为windws service,还要通过修改配置文件来控制用户权限,另外如果要想以Web方式【http协议】访问,一般还要安装配置Apache,如果是新手,岂不是很头痛?而VisualSVN Serve集成了Subversion和Apache,省去了以上所...
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How to create streams from string in Node.Js?

I am using a library, ya-csv , that expects either a file or a stream as input, but I have a string. 11 Answers ...
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plupload图片上传插件的使用 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...己定制。 plupload特性 Plupload使用jQuery的组件做为选择文件和上传文件的队列组件。 Plupload使用Flash,Silverlight,HTML5,Gears,BrowserPlus、FileUpload上传文件技术引擎。 Plupload允许自定义使用Plupload核心API来进行选择文件与上传文...
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项目管理实践教程二、源代码控制【Source Control Using VisualSVN Server ...

...启动,就要封装SVN Server为windws service,还要通过修改配置文件来控制用户权限,另外如果要想以Web方式【http协议】访问,一般还要安装配置Apache,如果是新手,岂不是很头痛?而VisualSVN Serve集成了Subversion和Apache,省去了以上所...
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How to allow download of .json file with ASP.NET

... I added two staticContent mimeMap's, one for JSON (necessary) and one for CSV (redundant, I assumed it was necessary, but the IISExpress applicationConfig already had CSV). Therefore I got this error anytime I tried to access any staticfile: Cannot add duplicate collection entry of type 'mimeMap' w...
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How does one reorder columns in a data frame?

...e above question do df2[,c(1,3,2,4)] If you want to output this file as a csv, do write.csv(df2, file="somedf.csv") share | improve this answer | follow | ...
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Programmatically access currency exchange rates [closed]

...le, to convert from GBP to EUR: http://download.finance.yahoo.com/d/quotes.csv?s=GBPEUR=X&f=sl1d1t1ba&e=.csv share | improve this answer | follow | ...
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通过 ulimit 改善系统性能 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术

...式开发环境中,各方面的资源都是非常紧缺的,对于开启文件描述符的数量,分配堆栈的大小,CPU 时间,虚拟内存大小,等等,都有非常严格的要求。资源的合理限制和分配,不仅仅是保证系统可用性的必要条件,也与系统上...