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How to save an activity state using save instance state?

I've been working on the Android SDK platform, and it is a little unclear how to save an application's state. So given this minor re-tooling of the 'Hello, Android' example: ...
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What is the most efficient way to deep clone an object in JavaScript?

What is the most efficient way to clone a JavaScript object? I've seen obj = eval(uneval(o)); being used, but that's non-standard and only supported by Firefox . I've done things like obj = JSON.parse(JSON.stringify(o)); but question the efficiency. I've also seen recursive copying funct...
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What does middleware and app.use actually mean in Expressjs?

Almost every Express app I see has an app.use statement for middleware but I haven't found a clear, concise explanation of what middleware actually is and what the app.use statement is doing. Even the express docs themselves are a bit vague on this. Can you explain these concepts for me please? ...
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MaterialDialog 对话框增强扩展 · App Inventor 2 中文网

...传入。 ShortLength 短时长 Toast 短时长的常量值,值为 0。在调用 ShowToast 时作为时长参数传入。 WrapContent 自动换行 控制 Toast 内容是否自动换行。设置为 true 则自动换行,设置为 false 则不换行。在调用 ShowToast 之前设置,以...
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初窥InnoDB的Memcached插件 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...| varchar(32) | NO | PRI | | | | c2 | varchar(1024) | YES | | NULL | | | c3 | int(11) | YES | | NULL | | | c4 | bigint(20) unsigned | YES | | NULL | | | c5 | int(11) | YES | | NULL ...
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Create a Date with a set timezone without using a string representation

I have a web page with three dropdowns for day, month and year. If I use the JavaScript Date constructor that takes numbers, then I get a Date object for my current timezone: ...
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C/C++ include header file order

What order should include files be specified, i.e. what are the reasons for including one header before another? 10 Answers...
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Moving Files into a Real Folder in Xcode

When I started my project I was happy to use Groups in Xcode rather than literal folders: Since I'm using the browser in Xcode to access everything, stuff was nicely organized and I was happy. ...
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Is it good style to explicitly return in Ruby?

Coming from a Python background, where there is always a "right way to do it" (a "Pythonic" way) when it comes to style, I'm wondering if the same exists for Ruby. I've been using my own style guidelines but I'm thinking about releasing my source code, and I'd like it to adhere to any unwritten rule...
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Correct format specifier to print pointer or address?

Which format specifier should I be using to print the address of a variable? I am confused between the below lot. 5 Answers...