Hi,
I am reading ruby from the book “Programming ruby” and that book lacks
programming exercises. I want to work out some problems in ruby.
Please point me towards a good resource on the net or it can be a book
also.
thanks
On Jun 6, 2010, at 21:48 , Lakshmanan Muthukrishnan wrote:
Hi,
I am reading ruby from the book “Programming ruby” and that book lacks
programming exercises. I want to work out some problems in ruby.Please point me towards a good resource on the net or it can be a book
also.
On Sun, Jun 6, 2010 at 11:48 PM, Lakshmanan Muthukrishnan <
[email protected]> wrote:
Posted via http://www.ruby-forum.com/.
Codingbat.com has lots of simple easy problems, but it’s mostly Java and
a
little bit of Python. Still, you can solve the problem however you like,
you
just won’t be able to use their automatic tester.
There are also a bunch at spoj.pl but I found that site frustrating,
because
it’s too dependent on string format of your output (a stray newline will
invalidate your solution, but you aren’t given enough feedback to figure
out
what formatting needs to change) And their time constraints are aimed at
compiled languages, which frequently prevents Ruby from being a
possibility.
codechef.com is basically spoj.pl taken to the next level with a
community
and flashy design. But I have had a lot of trouble getting their Ruby to
work right for me, and they don’t keep track of which solutions you’ve
previously solved, so you can’t really make a goal of solving all the
problems they have. I’ll probably try it again in 6 months or so, see if
they’ve made that stuff better.
If you like math, projecteuler.net is a good choice, math problems whose
scope is large enough that they usually require writing a program in
order
to solve them. Hardcore number crunching isn’t a great domain for Ruby,
though, and the problems get quite advanced pretty quickly. I maxed out
at
140 solved. But the problem solving skills of math complement the
problem
solving skills of programming (imo, anyway). I found it very helpful for
developing problem solving skills, and figuring out how to transform
what I
have into what I want.
I’m teaching some friends Ruby, and took a bunch of problems from a lot
of
different places, they have automated tests that you can run locally,
and
solutions also. If you’re interested, let me know, and I can put up
installation instructions, so that you can try your hand at it. (you’ll
need
to have git installed to get updates, or copy and paste a lot of files,
I’m
sort of building it as we go, there are 30 problems at present)
Some examples of the challenges
http://github.com/JoshCheek/JoshsRubyKickstart/blob/master/ch2/challenge/1_input_output.rb
http://github.com/JoshCheek/JoshsRubyKickstart/blob/master/ch2/challenge/12_classes.rb
http://github.com/JoshCheek/JoshsRubyKickstart/blob/master/ch3/challenge/3_hashes.rb
There are also solutions included (though many do not have a single
correct
answer, and I try to keep the solutions within the scope of what we have
covered together).
Search for “code golf”. I personally have enjoyed
http://golf.shinh.org/because the problems tend to be very simple. It
helps you learn the pros
and cons of various languages.
-Jake
On Mon, Jun 7, 2010 at 4:40 AM, Lakshmanan Muthukrishnan <
Josh C. wrote:
On Sun, Jun 6, 2010 at 11:48 PM, Lakshmanan Muthukrishnan <
[email protected]> wrote:Posted via http://www.ruby-forum.com/.
Codingbat.com has lots of simple easy problems, but it’s mostly Java and
a
little bit of Python. Still, you can solve the problem however you like,
you
just won’t be able to use their automatic tester.There are also a bunch at spoj.pl but I found that site frustrating,
because
it’s too dependent on string format of your output (a stray newline will
invalidate your solution, but you aren’t given enough feedback to figure
out
what formatting needs to change) And their time constraints are aimed at
compiled languages, which frequently prevents Ruby from being a
possibility.codechef.com is basically spoj.pl taken to the next level with a
community
and flashy design. But I have had a lot of trouble getting their Ruby to
work right for me, and they don’t keep track of which solutions you’ve
previously solved, so you can’t really make a goal of solving all the
problems they have. I’ll probably try it again in 6 months or so, see if
they’ve made that stuff better.
…
Thank you so much
The way I’ve used code golf breaks with tradition. I try to write clean
yet
concise code that solves the problem. It’s a great way to start playing
with a language that you’re not familiar with because, again, the
problem
statements are very simple. It has helped me learn the basics of
various
languages like the back of my hand.
-Jake
On Mon, Jun 7, 2010 at 7:35 AM, Jacob M.
[email protected] wrote:
Search for “code golf”. I personally have enjoyed
http://golf.shinh.org/because the problems tend to be very simple. It
helps you learn the pros
and cons of various languages.-Jake
I strongly disagree that code golf is a good learning exercise for a
beginner.
The first goal of newbie should be to learn to write clean
understandable code.
Code golf, where the goal is to write a program in the minimum of
characters, might be an interesting intellectual exercise, but it
leads to writing cryptic code which is just the opposite of what a
beginner should be learning.
Besides Dave T. code katas which Ryan mentioned. It might be
worthwhile to have a look at the old RubyQuiz site
–
Rick DeNatale
Blog: http://talklikeaduck.denhaven2.com/
Github: rubyredrick (Rick DeNatale) · GitHub
Twitter: @RickDeNatale
WWR: http://www.workingwithrails.com/person/9021-rick-denatale
LinkedIn: http://www.linkedin.com/in/rickdenatale
Lakshmanan Muthukrishnan wrote:
Hi,
I am reading ruby from the book “Programming ruby” and that book lacks
programming exercises. I want to work out some problems in ruby.Please point me towards a good resource on the net or it can be a book
also.
Maybe it’s name changed?
$ gem search -r nntp
*** REMOTE GEMS ***
nntp (1.0.0)
ruby-net-nntp (1.0.0)
Regards,
Dan
On 2010-06-07 04:45:51 -0700, Rick DeNatale said:
–
Rick DeNataleBlog: http://talklikeaduck.denhaven2.com/
Github: rubyredrick (Rick DeNatale) · GitHub
Twitter: @RickDeNatale
WWR: http://www.workingwithrails.com/person/9021-rick-denatale
LinkedIn: http://www.linkedin.com/in/rickdenatale
Agreed on all points, Rick. Ruby Q. is a treasure trove of
interesting Ruby problems and solutions. Also, code katas as mentioned
previously are a great way to train your “muscle memory” and ingrain
proper idioms and techniques. Highly recommended.
Hi,
On 7 June 2010 09:31, Josh C. [email protected] wrote:
have into what I want.
I would like to thank you for the link to project Euler, it is really
interesting !
Please point me towards a good resource on the net or it can be a book
also.
I would also recommend Ruby Q.
Regards,
B.D.