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Rails 3 - can't install pg gem
...config is, and assuming you are on Linux or Mac, you can run the following command:
which pg_config
Your pg-config can be in different locations depending on how you installed postgres.
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Running multiple AsyncTasks at the same time — not possible?
...n early Android OS versions) the pool size was just 1, meaning no parallel computations for a bunch of AsyncTasks. But later they fixed that and now the size is 5, so at most 5 AsyncTasks can run simultaneously. Unfortunately I don't remember in what version exactly they changed that.
UPDATE:
Here...
How do I choose between Semaphore and SemaphoreSlim?
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How do you set up use HttpOnly cookies in PHP
... edited May 23 '17 at 12:03
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answered Aug 31 '08 at 14:38
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How to remove the default link color of the html hyperlink 'a' tag?
...he body and of a paragraph is inherited. This
<a href="http://example.com">link</a> would normally take on the default link or visited color, but has been styled to inherit the color from the paragraph.</p>
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USB Debugging option greyed out
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You have to enable USB debugging before plugging your device in to the computer. Unplug device then try to enable USB debugging. This should work. If so, you can then plug it back into the computer and it should work
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Multiline bash commands in makefile
I have a very comfortable way to compile my project via a few lines of bash commands. But now I need to compile it via makefile. Considering, that every command is run in its own shell, my question is what is the best way to run multi-line bash command, depended on each other, in makefile?
For exa...
Practical use of `stackalloc` keyword
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The sole reason to use stackalloc is performance (either for computations or interop). By using stackalloc instead of a heap allocated array, you create less GC pressure (the GC needs to run less), you don't need to pin the arrays down, it's faster to allocate than a heap array, an it ...
Programmatically go back to the previous fragment in the backstack
...ack() methods (there are several to choose from)
http://developer.android.com/reference/android/app/FragmentManager.html#popBackStack()
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