isEvenAPI
coreutils
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isEvenAPI | coreutils | |
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35 | 112 | |
6 | 4,024 | |
- | 2.7% | |
0.0 | 9.3 | |
9 months ago | 4 days ago | |
Python | C | |
GNU General Public License v3.0 or later | GNU General Public License v3.0 only |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
isEvenAPI
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I'm a Teacher's Assistant for an intro CS class that business majors have to take
Sounds like your boss discovered https://isevenapi.xyz/ and I bet he opted for the enterprise edition so that you could test negative numbers!
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Truly amazing...
Pfff, filthy casuals. Just use the isEven API - https://isevenapi.xyz
- Stop reinventing the wheel
- API to check if a number is even or not
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Why do people need if statements to check for parity?
Why to reinvent the wheel if you can use existing service for that ;) https://isevenapi.xyz/
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It actually works
I'll do you one better: https://isevenapi.xyz/
- Are ya coding son?
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Beginner Moment
https://isevenapi.xyz/ isEven API - Tell if a number is even. I unironically used this is my GCSE CS programming project.
- Thereโs always at least one
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I forgot what modulo was
Why not just use this API? https://isevenapi.xyz/
coreutils
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GNU Coreutils 9.5 Can Yield 10~20% Throughput Boost For cp, mv and cat Commands
https://github.com/coreutils/coreutils/commit/fcfba90d0d27a1...
A summary of other changes just released in GNU coreutils 9.5 are:
* mv accepts --exchange to swap files
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How the GNU coreutils are tested
> some are simple like yes(1)
Not that simple: https://github.com/coreutils/coreutils/blob/master/src/yes.c
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Show HN: Usr/bin/env Docker run
The -S / --split-string option[1] of /usr/bin/env is a relatively recent addition to GNU Coreutils. It's available starting from GNU Coreutils 8.30[2], released on 2018-07-01.
Beware of portability: it relies on a non-standard behavior from some operating systems. It only works for OS's that treat all the text after the first space as argument(s) to the shebanged executable; rather than just treating the whole string as an executable path (that can happen to contain spaces).
Fortunately this non-standard behavior is more the norm than the exception: it works at least on modern GNU/Linux, BSDs, and macOS.
[1] https://www.gnu.org/software/coreutils/manual/html_node/env-...
[2] https://github.com/coreutils/coreutils/blob/b09dc6306e7affaf...
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From Nand to Tetris: Building a Modern Computer from First Principles
> building a cat from scratch
> That would be an interesting project.
Here is the source code of the OpenBSD implementation of cat:
> https://github.com/openbsd/src/blob/master/bin/cat/cat.c
and here of the GNU coreutils implementation:
> https://github.com/coreutils/coreutils/blob/master/src/cat.c
Thus: I don't think building a cat from scratch or creating a tutorial about that topic is particularly hard (even though the HN audience would likely be interested in it). :-)
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The Linux Scheduler: A Decade of Wasted Cores (2016) [pdf]
the yes command, writing to /dev/null, is making IO calls, which interfere with predictable scheduling.
If you look at the source code for yes, https://github.com/coreutils/coreutils/blob/master/src/yes.c
it builds a buffer of output and then writes that in a for loop
while (full_write (STDOUT_FILENO, buf, bufused) == bufused)
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nohup not working?
Looking at the source of nohup, if the execvp() of the child happens then it _must_ have already done the signal (SIGHUP, SIG_IGN) so - WTF?
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Is it fair to say "ls" is dead? No commits in 15 years
This got me wondering so I went and looked and it seems like lo and behold there was actually a commit to the GNU ls source just 2 weeks ago.
https://github.com/coreutils/coreutils/blob/master/src/ls.c
"maint: prefer char32_t to wchar_t"
- The Tao of Programming
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Decoded: GNU Coreutils
even an empty file? Yes. so now it was a file with a copyright disclaimer and nothing else. And the koan-like question comes to mind is "Can you copyright nothing?" well AT&T sure tried.
Then somebody said our programs should be well defined and not depend on a fluke of unix, which at this point was probable a good idea. so it became "exit 0"
Then somebody said we should write our system utilities in C instead of shell so it runs faster. openbsd still has a good example of how this would look.
http://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/src/usr....
At some point gnu bureaucracy got involved and said all programs must support the '-h' flag. so that got added, then they said all programs must support locale so that got added. now days gnu true is an astonishing 80 lines long.
https://github.com/coreutils/coreutils/blob/master/src/true....
http://trillian.mit.edu/~jc/humor/ATT_Copyright_true.html
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Exa Is Deprecated
> Yes, ls is maintained. Although, maintained is a very strong word. It exists.
Why would it be a strong word? Here it is, in src/ls.c: https://github.com/coreutils/coreutils
It is then packaged by tens of operating system distributions, who themselves maintain extra patchsets, some of which are then upstreamed.
It is installed and used on millions (billions?) of devices, for 3 decades.
It's a very reliable and trusty "sharp stick of metal" :)
What are some alternatives?
is-even - I created this in 2014, when I was learning how to program.
util-linux
sdk-generator - Generating SDKs for multiple programming languages and platforms โ๏ธ
madaidans-insecurities
stack-overflow-import - Import arbitrary code from Stack Overflow as Python modules.
busybox - BusyBox mirror
Vestaboard - An API Wrapper for Vestaboards written in Python
src - Read-only git conversion of OpenBSD's official CVS src repository. Pull requests not accepted - send diffs to the tech@ mailing list.
Pygame - ๐๐ฎ pygame (the library) is a Free and Open Source python programming language library for making multimedia applications like games built on top of the excellent SDL library. C, Python, Native, OpenGL.
linux - Linux kernel source tree
RandomProfileGenerator - ๐จโ๐ป Pip Module To Generate Random Profile( pip install random-profile)
gnulib - upstream mirror