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How can you make a custom keyboard in Android?

I want to make a custom keyboard. I don't know how to do it using XML and Java. The following picture is a model of the keyboard I want to make. It only needs numbers. ...
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Is it possible to install iOS 6 SDK on Xcode 5?

...w one to download iPhone 6.1 simulator, however I can't find a place where it allows downloading of iOS 6 SDK, thus it is not possible to set the active SDK to iOS 6 when developing with Xcode 5. Is there a workaround that would allow Xcode 5 to install iOS 6 SDK? ...
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Retain cycle on `self` with blocks

I'm afraid this question is pretty basic, but I think it's relevant to a lot of Objective-C programmers who are getting into blocks. ...
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How to get active user's UserDetails

... Preamble: Since Spring-Security 3.2 there is a nice annotation @AuthenticationPrincipal described at the end of this answer. This is the best way to go when you use Spring-Security >= 3.2. When you: use an older version of Spring-Security, need to...
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List vs tuple, when to use each? [duplicate]

...neous collections, similar to what you'd use arrays for. But I've never quite squared this with the mutability issue mentioned in the other answers. Mutability has teeth to it (you actually can't change a tuple), while homogeneity is not enforced, and so seems to be a much less interesting distinc...
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Read a file one line at a time in node.js?

...a large file one line at a time. I found a question on Quora that dealt with the subject but I'm missing some connections to make the whole thing fit together. ...
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How should one use std::optional?

...ntation of std::experimental::optional and I have a good idea about what it does, but I don't understand when I should use it or how I should use it. The site doesn't contain any examples as of yet which leaves it harder for me to grasp the true concept of this object. When is std::optional a ...
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How can I get form data with JavaScript/jQuery?

Is there a simple, one-line way to get the data of a form as it would be if it was to be submitted in the classic HTML-only way? ...
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How does RewriteBase work in .htaccess

...n my own words, after reading the docs and experimenting: You can use RewriteBase to provide a base for your rewrites. Consider this # invoke rewrite engine RewriteEngine On RewriteBase /~new/ # add trailing slash if missing rewriteRule ^(([a-z0-9\-]+/)*[a-z0-9\-]+)$ $1/ [NC,R=301,L] ...
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(-2147483648> 0) returns true in C++?

-2147483648 is the smallest integer for integer type with 32 bits, but it seems that it will overflow in the if(...) sentence: ...