Comments on: 10 Ruby One Liners to Impress Your Friends

By: Swift ? 10 ??????????? | ????

Swift ? 10 ??????????? | ???? — Tue, 19 Apr 2016 13:50:26 +0000

[…] ????????????????????? Scala ? 10 ????????????????????????????????????????????????? Haskell?Ruby?Groovy?Clojure?Python?C#?????F#?CoffeeScript? […]

By: swapnil patil

swapnil patil — Wed, 30 May 2012 20:51:52 +0000

In reply to Florian Gilcher. use p or puts

By: doel

doel — Tue, 29 May 2012 07:29:04 +0000

I liked the concept pf ||= in ruby a ||= b

By: IT Programming Courses – News » Blog Archive » Ten Groovy One Liners to Impress Your Friends

Tue, 14 Jun 2011 12:57:24 +0000

[…] 10 Scala One Liners to Impress Your Friends, which then led to (not in this order) 10 Ruby One Liners to Impress Your Friends, 10 Python one liners to impress your friends, 10 Clojure One Liners to Impress Your Friends, F# […]

By: oldmoe

oldmoe — Fri, 10 Jun 2011 17:42:41 +0000

def fib(n, h= n < 2? 1 : fib( n -1) + fib(n-2)); h; end

I recall seeing this Fibonacci function somewhere, makes an interesting one liner I suppose

By: Sijo

Sijo — Fri, 10 Jun 2011 09:50:19 +0000

I thought
(1..1).inject { |sum, n| sum + n } and
(1..1).sum will return 2 but it is 1. Can anybody please explain

By: 10 Smalltalk One Liners to Impress Your Friends | Varvello On XP, Simplicity, Smalltalk, Agile, Programming

Fri, 10 Jun 2011 02:42:19 +0000

[…] days ago, Antonio posted a list of 10 Ruby one-liners. The 1-liners saga started […]

By: -= 10 Haskell One Liners to Impress Your Friends =-

-= 10 Haskell One Liners to Impress Your Friends =- — Fri, 03 Jun 2011 21:56:32 +0000

[…] the meme (scala, ruby, clojure, python, f#, coffeescript, […]

By: steve

steve — Fri, 03 Jun 2011 20:59:45 +0000

> I find Ruby’s syntax to be a bit cleaner than Scala’s

As far as I understood the author of “10 Scala One Liners to Impress Your Friends” really decided to use some more complicated constructs tobe sure to impress.

> (1..1000).inject(&:+)
> [14, 35, -7, 46, 98].min
> [14, 35, -7, 46, 98].max

could be written as

> 1 to 1000 sum
> List(14, 35, -7, 46, 98) min
> List(14, 35, -7, 46, 98) max

in Scala.

The Ruby code (as well as the original Scala example have the problem that their algorithm (accumulating the result of adding every number of the range) is O(n) which is really really slow!

Summing 1 to Int.MaxValue takes ~35 seconds in Scala (so probably a few minutes in Ruby).

There exists a ticket for #sum in Scala to make it an O(1) operation.

By: Antonio Cangiano

Antonio Cangiano — Fri, 03 Jun 2011 16:11:00 +0000

In reply to al. Al, these are definitely basic one liners. They are just a Ruby translation of a Scala post made by someone else. They'd probably look more impressive to people used to mainstream statically typed languages like Java or C++.