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UIPopovercontroller dealloc reached while popover is still visible

...r in SO for my question but none of them were helpful. Here I got a simple code that should present a UIImagePickerController within a UIPopoverController : ...
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What's the difference between .so, .la and .a library files?

I know an .so file is a kind of dynamic library (lots of threads can share such libraries so there is no need to have more than one copy of it in memory). But what is the difference between .a and .la ? Are these all static libraries? ...
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ruby system command check exit code

I have a bunch of system calls in ruby such as the following and I want to check their exit codes simultaneously so that my script exits out if that command fails. ...
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Can I pass an array as arguments to a method with variable arguments in Java?

I'd like to be able to create a function like: 5 Answers 5 ...
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Rails check if yield :area is defined in content_for

I want to do a conditional rendering at the layout level based on the actual template has defined content_for(:an__area) , any idea how to get this done? ...
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How can I get the intersection, union, and subset of arrays in Ruby?

I want to create different methods for a class called Multiset . 3 Answers 3 ...
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How do I revert master branch to a tag in git?

We have branches origin and develop. The initial state of master was tagged at tag_ABC . 2 Answers ...
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Why are there two build.gradle files in an Android Studio project?

After having imported an Eclipse project into Android Studio, I see two build.gradle files: 2 Answers ...
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Postgresql query between date ranges

I am trying to query my postgresql db to return results where a date is in certain month and year. In other words I would like all the values for a month-year. ...
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How can I open Windows Explorer to a certain directory from within a WPF app?

In a WPF application, when a user clicks on a button I want to open the Windows explorer to a certain directory, how do I do that? ...