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How do I get the full path to a Perl script that is executing?
...me of the script during execution. I discovered that depending on how you call the script $0 varies and sometimes contains the fullpath+filename and sometimes just filename . Because the working directory can vary as well I can't think of a way to reliably get the fullpath+filename of the scr...
What's the simplest way to list conflicted files in Git?
...ff --check uses the whitespace rules from core.whitespace. You can disable all of the whitespace checks during git invocation to just get conflict markers: git -c core.whitespace=-trailing-space,-space-before-tab,-indent-with-non-tab,-tab-in-indent,-cr-at-eol diff --check
– Jos...
Calling C/C++ from Python?
...e Boost Python Library is a framework for interfacing Python and
C++. It allows you to quickly and seamlessly expose C++ classes
functions and objects to Python, and vice-versa, using no special
tools -- just your C++ compiler. It is designed to wrap C++ interfaces
non-intrusively, so that y...
What is the volatile keyword useful for?
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volatile has semantics for memory visibility. Basically, the value of a volatile field becomes visible to all readers (other threads in particular) after a write operation completes on it. Without volatile, readers could see some non-updated value.
To answer your question: Y...
Fixed point vs Floating point number
...oint and floating point numbers due to hard to read definitions about them all over Google. But none that I have read provide a simple enough explanation of what they really are. Can I get a plain definition with example?
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psql: FATAL: Peer authentication failed for user “dev”
...t evaluated as a "local" connect as you might see in pg_hba.conf:
local all all peer
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How does inline Javascript (in HTML) work?
I know this is bad practice. Don't write code like this if at all possible.
6 Answers
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How to configure git push to automatically set upstream without -u?
I want git push origin to automatically set the upstream reference when I push a locally-created branch for the first time.
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How many threads is too many?
...: measure, don't guess. One suggestion is to make it configurable and initially set it to 100, then release your software to the wild and monitor what happens.
If your thread usage peaks at 3, then 100 is too much. If it remains at 100 for most of the day, bump it up to 200 and see what happens.
Y...
UIButton Image + Text IOS
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I see very complicated answers, all of them using code. However, if you are using Interface Builder, there is a very easy way to do this:
Select the button and set a title and an image. Note that if you set the background instead of the image then the ima...