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Why does ContentResolver.requestSync not trigger a sync?

I am trying to implement the Content-Provider-Sync Adapter pattern as discussed at Google IO - slide 26. My content provider is working, and my sync works when I trigger it from the Dev Tools Sync Tester application, however when I call ContentResolver.requestSync(account, authority, bundle) from ...
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Why do x86-64 instructions on 32-bit registers zero the upper part of the full 64-bit register?

In the x86-64 Tour of Intel Manuals , I read 3 Answers 3 ...
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Why does my application spend 24% of its life doing a null check?

I've got a performance critical binary decision tree, and I'd like to focus this question on a single line of code. The code for the binary tree iterator is below with the results from running performance analysis against it. ...
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What are the differences between concepts and template constraints?

I want to know what are the semantic differences between the C++ full concepts proposal and template constraints (for instance, constraints as appeared in Dlang or the new concepts-lite proposal for C++1y ). ...
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Why should I use core.autocrlf=true in Git?

... The only specific reasons to set autocrlf to true are: avoid git status showing all your files as modified because of the automatic EOL conversion done when cloning a Unix-based EOL Git repo to a Windows one (see issue 83 for instance) and your coding tools...
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Scala: What is a TypeTag and how do I use it?

All I know about TypeTags is that they somehow replaced Manifests. Information on the Internet is scarce and doesn't provide me with a good sense of the subject. ...
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Java8: Why is it forbidden to define a default method for a method from java.lang.Object

Default methods are a nice new tool in our Java toolbox. However, I tried to write an interface that defines a default version of the toString method. Java tells me that this is forbidden, since methods declared in java.lang.Object may not be default ed. Why is this the case? ...
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How do I handle newlines in JSON?

I've generated some JSON and I'm trying to pull it into an object in JavaScript. I keep getting errors. Here's what I have: ...
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Why does SIGPIPE exist?

From my understanding, SIGPIPE can only occur as the result of a write() , which can (and does) return -1 and set errno to EPIPE ... So why do we have the extra overhead of a signal? Every time I work with pipes I ignore SIGPIPE and have never felt any pain as a result, am I missing somethin...
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Best practices for reducing Garbage Collector activity in Javascript

...seems to be a lot of garbage collection going on (based on the 'sawtooth' output from the Memory timeline in the Chrome dev tools) - and this often impacts the performance of the application. ...