Im new... so can i have some help

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

On Fri, Aug 15, 2008 at 3:03 PM, Daniel K. [email protected]
wrote:

array = {}

than u

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

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


“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)

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 (
http://www.ruby-doc.org/core/classes/Array.html#M002208)

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 P.'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

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?

Daniel K. 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?

On Fri, Aug 15, 2008 at 4:21 PM, Daniel K. [email protected]
wrote:

array.sort

how do i make it so its in one line?

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

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.


“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)

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…

Le Fri, 15 Aug 2008 18:06:38 -0500,
Daniel K. [email protected] 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…

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

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

Daniel K. 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…

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