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Why prefer two's complement over sign-and-magnitude for signed numbers?
...o add them.
Two's complement addition is very simple. You add numbers normally and any carry bit at the end is discarded. So they're added as follows:
0010
+ 1111
=10001
= 0001 (discard the carry)
0001 is 1, which is the expected result of "2+(-1)".
But in your "intuitive" method, adding is m...
Delete all but the most recent X files in bash
...n a pretty standard UNIX environment with bash, to run a command to delete all but the most recent X files from a directory?
...
How to determine if a point is in a 2D triangle? [closed]
...uction, and division is much, much, slower. Numeric issues are also much smaller, due to no division! all calculations are exact. Thanks, Rick
– user252020
Jan 16 '10 at 4:57
4
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Expand Python Search Path to Other Source
.... Remember that when you distribute your project to other users, they typically install it in such a manner that the Python code files will be automatically detected by Python's importer (i.e. packages are usually installed in the site-packages directory), so if you mess with sys.path in your code, ...
How to run Rake tasks from within Rake tasks?
...method?
task :build => [:some_other_tasks] do
build
end
task :build_all do
[:debug, :release].each { |t| build t }
end
def build(type = :debug)
# ...
end
If you'd rather stick to rake's idioms, here are your possibilities, compiled from past answers:
This always executes the task, bu...
How to make the tab character 4 spaces instead of 8 spaces in nano?
...
Hi @Alexey . This Linux Shell command works for all files, but make sure to specify another output-file, otherwise your file will be emptied.
– Sven Rojek
Oct 9 '17 at 13:42
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Creating C macro with ## and __LINE__ (token concatenation with positioning macro)
...lizing) unless the result needs to be "stringified". Gcc has features but ALL can be done with plain C version 1 (and some argue Berkeley 4.3 C is so much faster it's worth learning how to use).
**Clang (llvm) DOES NOT DO WHITE SPACE CORRECTLY for macro expansion - it adds whitespace (which certai...
Which timestamp type should I choose in a PostgreSQL database?
...ative TIMESTAMPs.
From a programmatic and consistency perspective, ensure all calculations are made using UTC as the time zone. This isn’t a PostgreSQL requirement, but it helps when integrating with other programming languages or environments. Setting a CHECK on the column to make sure the writ...
Is a Java string really immutable?
We all know that String is immutable in Java, but check the following code:
15 Answers
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Is there a Unix utility to prepend timestamps to stdin?
...
32
On my system 'awk' itself was buffering. (This can be problematic for log files). I fixed this by using: awk '{ print strftime("%Y-%m-...