Comments for Connecting the dots

Comment on challenge #4, listing files recursively with Ruby by Korny

Korny — Mon, 21 Jul 2008 07:02:04 +0000

You might also want to check the Ruby ‘find’ standard library
You can get the above down to:
require ‘find’
def list(file_name)
Find.find(file_name) do |path|
puts path unless FileTest.directory?(path)
end
end

Comment on challenge #5 Ruby Bubble Sort by bbaka

bbaka — Fri, 20 Jun 2008 15:00:26 +0000

Exactly, you are right . I have been able to develope two other versions of the bubble and other things. They will be available in subsequent blogs

Comment on Maximum Finder by bbaka

bbaka — Fri, 20 Jun 2008 14:48:44 +0000

@David Madden
Cool, now i have learnt one useful way of using inject method. Thanks and keep those comments comming

Comment on Maximum Finder by David Madden

David Madden — Fri, 02 May 2008 14:56:46 +0000

This is a classic search algorithm.

Ruby has a nice method called inject which negates the need for an extra variable.

biggest = a.inject do |biggest, num|
biggest > num ? biggest : num
end

puts biggest

biggest starts at 0 and then becomes the value returned from the block on each iteration. num is the next number from the array.

Comment on Ruby selection sort. by David Madden

David Madden — Fri, 02 May 2008 13:27:56 +0000

A little trick to make the swapping part a little more like ruby and less like java would be this:

a[i], a[min] = a[min], a[i]

one line and still readable sort of (i think)

Comment on challenge #5 Ruby Bubble Sort by chi

chi — Tue, 01 Apr 2008 21:37:24 +0000

i think, that at line 2, you meant to set swap = false. otherwise, the swap variable wouldn’t do anything for you. in line 11 you check if swap == false, but the way you have it right now, swap will never be false.

other then that, looks good! nice to see that you’ve tried to speed up bubble search a little bit by adding that swap variable.

Comment on Don’t be hard on yourself by yylex

yylex — Sat, 22 Mar 2008 03:55:30 +0000

You are right.