Im new... so can i have some help

ruby-talk
1

im new to ruby...... and i need some help!
im trying to make a quick app that takes an array of #'s
puts them into a specific order ( i thik ill use the method "list" for
that?"
and gets the mean, median and mode of the array of numbers?
how would i get what the user enters and puts it in
this is what i got so far

array = {}
num = gets.to_i
while num != 000

*please note the "while num != 000" is for when the user enters 000, the
program knows when to stop adding numbers to the array, and to get the
mean median and mode

than u

···

--
Posted via http://www.ruby-forum.com/.

2

Is this a homework assignment? while num != 000 is not going to do what you
expect. It will catch 0, 00, 000, 0000, 00000... as to_i converts those to
0.

also you would want to write it as

while num != 000
  num = gets.to_i
  array << num
end

···

On Fri, Aug 15, 2008 at 3:03 PM, Daniel Kindler <gizabo@yahoo.com> wrote:

im new to ruby...... and i need some help!
im trying to make a quick app that takes an array of #'s
puts them into a specific order ( i thik ill use the method "list" for
that?"
and gets the mean, median and mode of the array of numbers?
how would i get what the user enters and puts it in
this is what i got so far

array = {}
num = gets.to_i
while num != 000

*please note the "while num != 000" is for when the user enters 000, the
program knows when to stop adding numbers to the array, and to get the
mean median and mode

than u
--
Posted via http://www.ruby-forum.com/\.

--
"Hey brother Christian with your high and mighty errand, Your actions speak
so loud, I can't hear a word you're saying."

-Greg Graffin (Bad Religion)

3

Dear Daniel.

im new to ruby...... and i need some help!

welcome to Ruby. You'll find help on this list :slight_smile:

im trying to make a quick app that takes an array of #'s
puts them into a specific order ( i thik ill use the method "list" for
that?"

Use sort for that ( class Array - RDoc Documentation)

and gets the mean, median and mode of the array of numbers?

There's Array#inject for summing, median is the middle of the sorted Array,
and modes are elements that are equal to Array#max.

I'd suggest you go through Chris Pine's little tutorial for Ruby:

http://pine.fm/LearnToProgram/

or, if you have some love for comics ... and more time ...

http://poignantguide.net/ruby/

to get an impression of the language.
Also, there are many quizzes for Ruby with different solutions to a problem:

http://rubyquiz.com/

And of course, many excellent books, and readily written software packages (in your case,
search e.g., for the statistics2 package on the RAA (Ruby Application Archive).

Best regards,

Axel

···

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4

ok this is what i wrote so far

array = []
num = gets.to_i
while num != 000
num = gets.to_i
  array << num
array.sort
end

why wont if list out the numbers?

···

--
Posted via http://www.ruby-forum.com/.

5

Daniel Kindler wrote:

ok this is what i wrote so far

array =
num = gets.to_i
while num != 000
num = gets.to_i
  array << num
array.sort
end

why wont if list out the numbers?

nvm i relized i didnt add the "puts"
but it comes out like this

2
5
6
8
9

how do i make it so its in one line?

···

--
Posted via http://www.ruby-forum.com/\.

6

Daniel Kindler wrote:

ok this is what i wrote so far

In general...

  - 'ok' is spelled 'okay' - it's an African word, not an acronym

  - a good way to learn Ruby interactively is this link here:

   http://tryruby.hobix.com/

It might lead you thru the basics for arrays...

···

--
   Phlip

7

If you want the array data as a string (i.e. one line) you can use the join
method:

puts array.join(' ') would print the numbers in the array separated by
spaces
puts array.join(',') would separate the elements with a comma

You can separate them with whatever you want, it can even be multiple
characters.

···

On Fri, Aug 15, 2008 at 4:21 PM, Daniel Kindler <gizabo@yahoo.com> wrote:

Daniel Kindler wrote:
> ok this is what i wrote so far
>
>
>
> array =
> num = gets.to_i
> while num != 000
> num = gets.to_i
> array << num
> array.sort
> end
>
>
>
>
>
> why wont if list out the numbers?

nvm i relized i didnt add the "puts"
but it comes out like this

2
5
6
8
9

how do i make it so its in one line?
--
Posted via http://www.ruby-forum.com/\.

--
"Hey brother Christian with your high and mighty errand, Your actions speak
so loud, I can't hear a word you're saying."

-Greg Graffin (Bad Religion)

8

ok, so here is my code

array = []
num = gets.to_i
while num != 0
num = gets.to_i
  array << num
end
puts array.sort.join(',')

works well so far

Now, how would i take the numbers in the array, and add them......

···

--
Posted via http://www.ruby-forum.com/.

9

puts array.inject {|sum,n| sum+n}

(http://www.ruby-doc.org/core/classes/Enumerable.html\)

···

Le Fri, 15 Aug 2008 18:06:38 -0500, Daniel Kindler <gizabo@yahoo.com> a écrit :

array =
num = gets.to_i
while num != 0
num = gets.to_i
  array << num
end
puts array.sort.join(',')
works well so far
Now, how would i take the numbers in the array, and add them......

--
Arnaud Schmittbuhl