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how to stop browser back button using javascript

... There are numerous reasons why disabling the back button will not really work. Your best bet is to warn the user: window.onbeforeunload = function() { return "Your work will be lost."; }; This page does list a number of ways you could try to disable the back button, but n...
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Defining a percentage width for a LinearLayout? [duplicate]

...t to define a percentage width (70%) for a LinearLayout that contains some buttons, so that I can center it and so that the child buttons can fill_parent. Here's a picture showing what I mean: ...
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App Inventor 2 文本代码块 · App Inventor 2 中文网

...串可以包含任何字符(字母、数字或其他特殊字符)。 App Inventor 上,它将被视为一个文本对象。 合并字符串 合并所有输以生成单个字符串,如果没有输,则返回一个空字符串。 求长度 返回字符串中包含空格的...
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How can I get my Twitter Bootstrap buttons to right align?

... Insert pull-right into the class attribute and let bootstrap arrange the buttons. For Bootstrap 2.3, see: http://getbootstrap.com/2.3.2/components.html#misc > Helper classes > .pull-right. For Bootstrap 3, see: https://getbootstrap.com/docs/3.3/css/#helper-classes > Helper classes. F...
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记一次MongoDB性能问题 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...MongoDB性能问题最近忙着把一个项目从MySQL迁移到MongoDB,旧数据的过程中,遇到了些许波折,犯了不少错误,但同时也学到了不少知识,遂记录下来。公...最近忙着把一个项目从MySQL迁移到MongoDB,旧数据的过程中,...
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How to convert std::string to LPCWSTR in C++ (Unicode)

... If you are in an ATL/MFC environment, You can use the ATL conversion macro: #include <atlbase.h> #include <atlconv.h> . . . string myStr("My string"); CA2W unicodeStr(myStr); You can then use unicodeStr as an LPCWSTR. The memory...
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Deep Learning(深度学习)学习笔记整理系列之(二) - 大数据 & AI - 清泛...

...者说关于这个层级特征,我们需要了解地更深点。所以说Deep Learning之前,我们有必要再啰嗦下特征(呵呵,实际上是看到那么好的对特征的解释,不放这里有点可惜,所以就塞到这了)。 四、关于特征 特征是...
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C#对象序列化与反序列化 - 更多技术 - 清泛网移动版 - 专注C/C++及内核技术

...(包括包称、版本、公钥标记、区域性),这些数据使得进行二进制格式反序列化时亦会进行类型检查。SOAP格式序列化通过使用XML命名空间来持久化原始程序集信息。而XML格式序列化不会保存完整的类型名称或程序集信息。...
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How to handle click event in Button Column in Datagridview?

...cation using C#. I am using DataGridView to display data. I have added a button column in that. I want to know how can I handle click event on that button in DataGridView. ...
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boost::filesystem指南 - C/C++ - 清泛网 - 专注C/C++及内核技术

...径、文件元信息的操作一直难以做可移植性。然而对于现的程序来说,可移植性极端重要,谁也不保证他写程序不要某一天要移植更一个系统中去,可能这个系统现大家还很少听说。 boost.filesystem为大家提供了一个选择。boo...