[#398788] Constructor or a Method — Rubyist Rohit <lists@...>

Take for instance this code:

13 messages 2012/09/01

[#398896] how to sum element of array — Edward QU <lists@...>

dear all

19 messages 2012/09/04

[#398936] best coding for limiting a value — Regis d'Aubarede <lists@...>

A) result=value<min ? min : (value > max ? max : value)

17 messages 2012/09/04

[#398962] Long calculation & time limit — toto tartemolle <lists@...>

Hello,

17 messages 2012/09/05

[#398964] Compiling ruby from source on windows — GPad <peterpan105105@...>

Hi to all,=0AI'm trying to compile ruby on my windows 7. I have already a r=

10 messages 2012/09/05

[#398997] OpenURI open method problem — "Derek T." <lists@...>

The code I am referring to looks like this:

12 messages 2012/09/05

[#399002] Parsing through downloaded html — Sybren Kooistra <lists@...>

Hi all,

28 messages 2012/09/06

[#399012] "Hiding" pictures(and source code if it's possible) — "Damián M. González" <lists@...>

Ey guys, how are you?

11 messages 2012/09/06

[#399083] regix in grep or something like this — Ferdous ara <lists@...>

Hi

12 messages 2012/09/07

[#399206] please help me with making script — Charmaine Willemsen <lists@...>

In this example i like to parse birthday and sexe

11 messages 2012/09/11

[#399218] Pathname#to_str withdrawn in 1.9? — matt@... (Matt Neuburg)

Just getting started experimenting with Ruby 1.9 (1.9.3) and my scripts

13 messages 2012/09/12

[#399227] Breaking Down the Block — incag neato <lists@...>

Can someone please explain in plain english how this block treats the

20 messages 2012/09/13

[#399244] ruby Range to array that acts like time objects? — "Jermaine O." <lists@...>

Hello everybody,

15 messages 2012/09/13

[#399293] Ruby on Ubuntu 12.04 LST — Bojan Jordanovski <lists@...>

Hello everybody,

13 messages 2012/09/14

[#399298] wow, YAML / Psych in 1.9.3 is *slow*! — matt@... (Matt Neuburg)

I just started trying Ruby 1.9.3, coming from Ruby 1.8.7, and was

12 messages 2012/09/14

[#399304] Ruby 1.9.3 and OS X Mountain Lion — sto.mar@...

Hi all,

16 messages 2012/09/14

[#399343] Class variables or Class singleton variables? — "Damián M. González" <lists@...>

Guys, how are you?

18 messages 2012/09/15

[#399386] Ruby - is it worth the effort? — neomex <neomex@...>

Hello,

19 messages 2012/09/17
[#399406] Re: Ruby - is it worth the effort? — Roger Pack <lists@...> 2012/09/17

Unfortunately with Ruby for me it's typically "fun and fast development"

[#399409] Re: Ruby - is it worth the effort? — Peter Zotov <whitequark@...> 2012/09/17

Roger Pack писал 17.09.2012 22:06:

[#399491] Re: Ruby - is it worth the effort? — Robert Klemme <shortcutter@...> 2012/09/19

On Mon, Sep 17, 2012 at 8:20 PM, Peter Zotov <whitequark@whitequark.org> wr=

[#399421] Encoding question — Thomas Bednarz <lists@...>

I am new to ruby and play around with it a little bit at the moment. I

17 messages 2012/09/17

[#399441] Bug or feature — Damjan Rems <lists@...>

There has probably been some discussion about this problem so sorry if I

13 messages 2012/09/18

[#399451] Class variables — Aleksander Ciesielski <neomex@...>

Is it obligatory to use instance variables in classes? Can't we just

17 messages 2012/09/18

[#399479] Ruby SQL Select Sum 2 Columns? — Courtney Fay <lists@...>

I have the following definition which is looking at an apache database,

12 messages 2012/09/18

[#399556] still learning by doing - connecting rooms in a game — "Sebastjan H." <lists@...>

Hi,

28 messages 2012/09/20
[#399570] Re: still learning by doing - connecting rooms in a game — Henry Maddocks <hmaddocks@...> 2012/09/20

[#399574] Re: still learning by doing - connecting rooms in a game — "Sebastjan H." <lists@...> 2012/09/21

Henry Maddocks wrote in post #1076876:

[#399575] Re: still learning by doing - connecting rooms in a game — Henry Maddocks <hmaddocks@...> 2012/09/21

[#399576] Re: still learning by doing - connecting rooms in a game — "Sebastjan H." <lists@...> 2012/09/21

Could you be so kind as to suggest another book? I mean there are many

[#399585] Re: still learning by doing - connecting rooms in a game — "Sebastjan H." <lists@...> 2012/09/21

Sebastjan H. wrote in post #1076909:

[#399572] How would you allow variable from specific list of Fixnum? — Eliezer Croitoru <eliezer@...>

I have:

11 messages 2012/09/21

[#399623] Very important question - survey — Marc Heiler <lists@...>

Is matz more like a ninja or more like a samurai?

11 messages 2012/09/22

[#399695] inject problem — Roelof Wobben <rwobben@...>

26 messages 2012/09/25

[#399714] could initialize return an existing object instead of a new instance? — Gary Weaver <lists@...>

Is it possible for initialize to return an existing object instead of a

9 messages 2012/09/25

[#399811] Good book for getting started with Ruby? [I code Python!] — Alec Taylor <alec.taylor6@...>

I've learned programming in C++, Python and PHP at University. (also

12 messages 2012/09/28

[#399815] calcaulation with unknown numbers of numbers and options fail — Roelof Wobben <rwobben@...>

11 messages 2012/09/28

Subtraction, union and intersection of arrays in Ruby

From: Joao Silva <lists@...>
Date: 2012-09-06 17:39:29 UTC
List: ruby-talk #399020
Hi All.

In the exercise I'm trying to solve I have 2 arrays of names and what I
have to do in a subtraction, a union and an intersection of arrays, the
issue is that I have to use basic functions as a for loop such as this
is as indicated by the exercise, and while I understand the logic of
what to do, I can not think how to implement it correctly.

Exercise such functions done with Ruby or unused cycles would look like:

#######################################################################

op_sys =3D ["Fedora", "SuSE", "Tuquito", "Windows", "MacOS"]
linux_sys =3D ["Tuquito", "SuSE", "PCLinuxOS", "Ubuntu", "Fedora"]

sub =3D (op_sys) - (linux_sys)
int =3D (op_sys) & (linux_sys)
uni =3D (op_sys) | (linux_sys)

puts "Subtraction: # {rest}"
puts "intersection: # {int}"
puts "Union: # {uni}"

#########################################################################=


Now if I try to do with basic functions, such as subtraction of arrays:

################################################################

op_sys =3D ["Fedora", "SuSE", "Tuquito", "Windows", "MacOS"]
linux_sys =3D ["Tuquito", "SuSE", "PCLinuxOS", "Ubuntu", "Fedora"]

for i in 0 .. 4
=C2=A0=C2=A0=C2=A0=C2=A0 op_sys if [i]! =3D linux_sys [i]
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 subtra=
ction =3D [i] =3D op_sys [i]
=C2=A0=C2=A0=C2=A0=C2=A0 end
end

puts "Subtraction: # {subtraction}"

#################################################################


Here is a little tricky, and not calculated well, I've been trying many
combinations, but do not know how to calculate the difference of arrays
using basic functions properly.

I accept any suggestions. Thank you.

-- =

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

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