Wc in D: 712 Characters Without a Single Branch

#1

Post by aldacron » Tue, Jan 28, 2020, 1:58 PM UTC

Wc in D: 712 Characters Without a Single Branch
dlang.org

Re: Wc in D: 712 Characters Without a Single Branch

#2

Post by brian_herman__ » Tue, Jan 28, 2020, 2:55 PM UTC

I find D easier to grok coming from a Java/Python background.

Re: Wc in D: 712 Characters Without a Single Branch

#3

Post by jordigh » Tue, Jan 28, 2020, 3:01 PM UTC

brian_herman__ wrote: post #2

I find D easier to grok coming from a Java/Python background.

I feel the same way too. It's fairly easy to translate Python into D, and you get all of that compile-time goodness to go with it (static type checking and compile-time function execution). And it's pretty fast! I bet we could optimise this D wc to match GNU's wc without too many crazy tricks.

Re: Wc in D: 712 Characters Without a Single Branch

#4

Post by bestouff » Tue, Jan 28, 2020, 3:08 PM UTC

There's also a wc in rust (of course) with more code (120 lines) but quite more efficient: https://medium.com/@martinmroz/beating-c-with-120-lines-of-r...

Re: Wc in D: 712 Characters Without a Single Branch

#5

Post by ses1984 » Tue, Jan 28, 2020, 3:13 PM UTC

bestouff wrote: post #4

There's also a wc in rust (of course) with more code (120 lines) but quite more efficient: https://medium.com/@martinmroz/beating-c-with-120-lines-of-r...

In the blog post you linked, a library for parallelism is used.

Re: Wc in D: 712 Characters Without a Single Branch

#6

Post by vips7L » Tue, Jan 28, 2020, 3:31 PM UTC

brian_herman__ wrote: post #2

I find D easier to grok coming from a Java/Python background.

My only issue is that it's far more complicated than Java and for a language that fills that same niche it's hard for me to justify putting my resources into learning it even though I do like a lot of the features.

Re: Wc in D: 712 Characters Without a Single Branch

#7

Post by andrepd » Tue, Jan 28, 2020, 3:31 PM UTC

"without a single branch" I thought it meant actually a branchless version of wc. Turns out it's just no explicit if statements.

Re: Wc in D: 712 Characters Without a Single Branch

#8

Post by pixelbeat__ » Tue, Jan 28, 2020, 3:32 PM UTC

A couple of points with comparing coreutils,

* recompiling with -march=native can give significant wins over more generic binaries provided by linux distros.

* parallel processing helps with bigger files, and it's easy enough to leverage the existing wc binary to process in parallel.

Both points are discussed at: https://www.pixelbeat.org/docs/unix-parallel-tools.html

Re: Wc in D: 712 Characters Without a Single Branch

#9

Post by bachmeier » Tue, Jan 28, 2020, 3:38 PM UTC

vips7L wrote: post #6

brian_herman__ wrote: post #2

I find D easier to grok coming from a Java/Python background.

My only issue is that it's far more complicated than Java and for a language that fills that same niche it's hard for me to justify putting my resources into learning it even though I do like a lot of the features.

It's certainly possible to write more complicated code in a language like D than in Java. I personally find the verbosity of Java combined with jamming everything into a single approach makes Java hard to read.

Re: Wc in D: 712 Characters Without a Single Branch

#10

Post by forgotpwd16 » Tue, Jan 28, 2020, 4:02 PM UTC

I'm wavering between D and Rust for which one could be used as a better alternative to C++. (Though I don't see C++ getting replaced anytime soon.) Even if Rust is getting most of the attention, D also seems to be a strong candidate.