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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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Checking Bash exit status of several commands efficiently

Is there something similar to pipefail for multiple commands, like a 'try' statement but within bash. I would like to do something like this: ...
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Padding between ActionBar's home icon and title

Does anybody know how to set padding between the ActionBar's home icon and the title? 21 Answers ...
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Cloning a private Github repo

...ntil now I had only worked on my home desktop, but I just bought a laptop, and am trying to set it up so that I can work on the project from either computer, and push / pull changes. ...
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What is the difference between `git merge` and `git merge --no-ff`?

...fference between the two. How can I observe the difference (with a git command or some tool)? 6 Answers ...
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Value of i for (i == -i && i != 0) to return true in Java

...000000000000000000 Taking the negative value is done by first swapping 0 and 1, which gives 01111111111111111111111111111111 and by adding 1, which gives 10000000000000000000000000000000 As you can see in the link I gave, Wikipedia mentions the problem with the most negative numbers and spec...
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Record file copy operation with Git

...a file in git using git-mv the status shows that the file has been renamed and even if I alter some portions it still considers to be almost the same thing (which is good because it lets me follow the history of it). ...
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Focusable EditText inside ListView

I've spent about 6 hours on this so far, and been hitting nothing but roadblocks. The general premise is that there is some row in a ListView (whether it's generated by the adapter, or added as a header view) that contains an EditText widget and a Button . All I want to do is be able to use t...
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Converting Stream to String and back…what are we missing?

I want to serialize objects to strings, and back. 8 Answers 8 ...
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Xcode 6 iPhone Simulator Application Support location

... in Application Support for the iOS 8 iPhone Simulator. Where are my files and Core Data sqlite database being stored? 16 A...