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Ruby send vs __send__
....send but I'm trying to figure out why you can call this both ways. The Ruby Koans imply that there is some reason beyond providing lots of different ways to do the same thing. Here are the two examples of usage:
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Where is Python's sys.path initialized from?
...s used instead.
Otherwise, these sys.prefix and sys.exec_prefix are found by walking backwards
from the location of sys.executable, or the home directory given by pyvenv.cfg if any.
If the file lib/python<version>/dyn-load is found in that directory
or any of its parent directories, that dir...
Understanding colors on Android (six characters)
...hex digits for each value of alpha, red, green and blue respectively).
So by removing the final 55 you're changing from A=B4, R=55, G=55, B=55 (a mostly transparent grey), to R=B4, G=55, B=55 (a fully-non-transparent dusky pinky).
See the "Color" documentation for the supported formats.
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How to inspect the return value of a function in GDB?
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Yes, just examine the EAX register by typing print $eax. For most functions, the return value is stored in that register, even if it's not used.
The exceptions to this are functions returning types larger than 32 bits, specifically 64-bit integers (long long...
Error - Unable to access the IIS metabase
...t load the project. (On Windows 7+, you access everything as a normal user by default. The problem is that VS won't ask you to elevate your privileges when you need to, so you need to manually grant the permissions to access that directory to yourself.)
– PotatoEngineer
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Difference between Array and List in scala
...er conversion is required.
A scala Array should be implemented on the JVM by a Java array, and hence an Array[Int] may be much more performant (as an int[]) than a List[Int] (which will box its contents, unless you are using the very latest versions of Scala which have the new @specialized feature)...
Locking a file in Python
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As noted by a comment at the blog post, this solution isn't "perfect", in that it's possible for the program to terminate in such a way that the lock is left in place and you have to manually delete the lock before the file becomes ac...
How do I get time of a Python program's execution?
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this calculates the real time though (including time used by other programs) so it will seem to take more time when your computer is busy doing other stuff
– newacct
Oct 13 '09 at 1:23
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git - diff of current changes before committing
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git diff by default shows difference between your working directory and the index (staging area for the next commit).
If you have already added (staged) the changes to the staging area, git diff --staged does the job. Staging area i...
Difference between Char.IsDigit() and Char.IsNumber() in C#
... digit character, that is, a character in the range 0 through 9. Signified by the Unicode designation "Nd" (number, decimal digit). The value is 8.
LetterNumber
Number represented by a letter, instead of a decimal digit, for example, the Roman numeral for five, which is "V". The indicator is sig...