[#343034] RUBY vs COMMON LISP — fft1976 <fft1976@...>

On Aug 1, 8:55m, p...@informatimago.com (Pascal J. Bourguignon)

16 messages 2009/08/02

[#343054] Inconsistency in Array#[] — Wojciech Piekutowski <w.piekutowski@...>

Disclaimer: I know what docs say, but I'd prefer a different

14 messages 2009/08/02

[#343135] Kind of ParsTree for 1.9.1 — Macario Ortega <macarui@...>

22 messages 2009/08/04

[#343186] Bizarre Range behavior — Scott Briggs <scott.br@...>

Can someone please explain this behavior in ruby (1.8.6p111):

42 messages 2009/08/04
[#343187] Re: Bizarre Range behavior — Yossef Mendelssohn <ymendel@...> 2009/08/04

On Aug 4, 1:47m, Scott Briggs <scott...@gmail.com> wrote:

[#343193] Re: Bizarre Range behavior — Rob Biedenharn <Rob@...> 2009/08/04

On Aug 4, 2009, at 3:04 PM, Yossef Mendelssohn wrote:

[#343196] Re: Bizarre Range behavior — "Matthew K. Williams" <matt@...> 2009/08/04

On Wed, 5 Aug 2009, Rob Biedenharn wrote:

[#343199] Re: Bizarre Range behavior — Rob Biedenharn <Rob@...> 2009/08/04

On Aug 4, 2009, at 3:45 PM, Matthew K. Williams wrote:

[#343234] Re: Bizarre Range behavior — Yukihiro Matsumoto <matz@...> 2009/08/05

Hi,

[#343251] Re: Bizarre Range behavior — Brian Candler <b.candler@...> 2009/08/05

Yukihiro Matsumoto wrote:

[#343261] Re: Bizarre Range behavior — Yukihiro Matsumoto <matz@...> 2009/08/05

Hi,

[#343266] Re: Bizarre Range behavior — "David A. Black" <dblack@...> 2009/08/05

Hi --

[#343272] Re: Bizarre Range behavior — Yukihiro Matsumoto <matz@...> 2009/08/05

Hi,

[#343273] Re: Bizarre Range behavior — Rick DeNatale <rick.denatale@...> 2009/08/05

On Wed, Aug 5, 2009 at 12:21 PM, Yukihiro Matsumoto<matz@ruby-lang.org> wrote:

[#343235] remove commas from string — Jason Lillywhite <jason.lillywhite@...>

I have following string:

14 messages 2009/08/05

[#343288] including gems with standalone app — Eric Peterson <ericdp@...>

Morning,

10 messages 2009/08/05

[#343320] 1.9 String and M17N documentation — Brian Candler <b.candler@...>

I have put together a document which tries to outline the M17N

20 messages 2009/08/06
[#343351] Re: [ANN] 1.9 String and M17N documentation — James Gray <james@...> 2009/08/06

On Aug 6, 2009, at 6:47 AM, Brian Candler wrote:

[#343378] Re: [ANN] 1.9 String and M17N documentation — Eric Hodel <drbrain@...7.net> 2009/08/07

On Aug 6, 2009, at 08:57, James Gray wrote:

[#343423] How do I add ? — chutsu <chutsu@...>

I've got a file that is in two columns, how do I add the second column

14 messages 2009/08/07

[#343566] Reading contents of a file and storing — Shekar Ls <idealone5@...>

Guys,

14 messages 2009/08/10

[#343592] Destroying related objects doubt ... basic oop question — Soh Dubom <sohdubom@...>

::Destroying related objects doubt

16 messages 2009/08/10
[#343726] Re: Destroying related objects doubt ... basic oop question — Mike Stephens <rubfor@...> 2009/08/12

Yet another reason for steering well clear of object-relational mappers.

[#343751] Re: Destroying related objects doubt ... basic oop question — Fabian Streitel <karottenreibe@...> 2009/08/12

> Yet another reason for steering well clear of object-relational mappers.

[#343649] Good editor for Windows Ruby — Peter Bailey <pbailey@...>

Hello,

21 messages 2009/08/11

[#343658] Readline not working with Ruby — Stewart <stewart.matheson@...>

24 messages 2009/08/11

[#343756] Class#descendants? — Jason Lillywhite <jason.lillywhite@...>

Ruby can do Class#ancestors but not Class#descendants.

18 messages 2009/08/12
[#343757] Re: Class#descendants? — Joel VanderWerf <vjoel@...> 2009/08/12

Jason Lillywhite wrote:

[#343771] skip_before_filter (Do I need a lesson in modules/mixins?) — Cris Shupp <cshupp1@...>

Gurus,

13 messages 2009/08/12

[#343831] newbie question making a folder with ruby — Simon Staton <simon@...>

ok well the program I am in the middle of programming I need it to

20 messages 2009/08/13
[#343851] Re: newbie question making a folder with ruby — Lui Core <usurffx@...> 2009/08/13

Simon Staton wrote:

[#343898] Re: newbie question making a folder with ruby — Simon Staton <simon@...> 2009/08/14

Lui Core wrote:

[#343902] Re: newbie question making a folder with ruby — Simon Staton <simon@...> 2009/08/14

To give more of an idea this is the code that I have on the .rb file. it

[#343920] Class method aliased in superclass bypasses subclass overrides — Marcos <markjreed@...>

This seems like it should work:

11 messages 2009/08/14

[#344009] start_with? Does someone need a grammar lesson? — 7stud -- <bbxx789_05ss@...>

String#start_with?-------------------------------

15 messages 2009/08/17

[#344088] fromdos dos2unix in ruby — Krzysztof Cierpisz <ciapecki@...>

how can I achieve in ruby the result of running:

18 messages 2009/08/18
[#344103] Re: fromdos dos2unix in ruby — krzysztof cierpisz <ciapecki@...> 2009/08/18

>

[#344109] Re: fromdos dos2unix in ruby — Robert Klemme <shortcutter@...> 2009/08/18

2009/8/18 krzysztof cierpisz <ciapecki@gmail.com>:

[#344125] exercise in DRY — Peter Ehrlich <crazedcougar@...>

I have some simple code for a thumbs up/thumbs down functionality.

13 messages 2009/08/18

[#344180] #has_arguments? — Intransition <transfire@...>

Messing with optional argument check for the umpteenth time, eg.

23 messages 2009/08/19

[#344218] Confirm my Performance Test Against Java? — Ben Christensen <benjchristensen@...>

I'm evaluating Ruby for use in a variety of systems that are planned by

40 messages 2009/08/19
[#344222] Re: Confirm my Performance Test Against Java? — brabuhr@... 2009/08/19

On Wed, Aug 19, 2009 at 9:31 AM, Ben Christensen

[#344342] extending ruby - handling errors — Jason Lillywhite <jason.lillywhite@...>

I want to raise an ArgumentError, "Function only takes numeric objects."

11 messages 2009/08/20

[#344345] How do I estimate how long it will take a calculation to complete? — Paul <tester.paul@...>

Hi there, I wrote a short ruby script to calculate the prime factors

10 messages 2009/08/20

[#344366] Why, oh why, _why? — Karl von Laudermann <doodpants@...>

_why the lucky stiff appears to have disappeared from the internets!

79 messages 2009/08/20
[#344400] Re: Why, oh why, _why? — Ralf Mueller <ralf.mueller@...> 2009/08/21

Karl von Laudermann wrote:

[#344421] Re: Why, oh why, _why? — Gregory Brown <gregory.t.brown@...> 2009/08/21

On Fri, Aug 21, 2009 at 4:24 AM, Ralf Mueller<ralf.mueller@zmaw.de> wrote:

[#344432] Re: Why, oh why, _why? — Rick DeNatale <rick.denatale@...> 2009/08/21

On Fri, Aug 21, 2009 at 7:17 AM, Gregory Brown<gregory.t.brown@gmail.com> wrote:

[#344434] Re: Why, oh why, _why? — Gregory Brown <gregory.t.brown@...> 2009/08/21

On Fri, Aug 21, 2009 at 9:49 AM, Rick DeNatale<rick.denatale@gmail.com> wrote:

[#344441] Re: Why, oh why, _why? — Jason Roelofs <jameskilton@...> 2009/08/21

On Fri, Aug 21, 2009 at 9:54 AM, Gregory Brown <gregory.t.brown@gmail.com>wrote:

[#344448] Re: Why, oh why, _why? — Xavier Noria <fxn@...> 2009/08/21

On Fri, Aug 21, 2009 at 4:07 PM, Jason Roelofs<jameskilton@gmail.com> wrote:

[#344453] Re: Why, oh why, _why? — Jason Roelofs <jameskilton@...> 2009/08/21

On Fri, Aug 21, 2009 at 10:23 AM, Xavier Noria <fxn@hashref.com> wrote:

[#344525] Re: Why, oh why, _why? — Todd Benson <caduceass@...> 2009/08/22

On Thu, Aug 20, 2009 at 3:10 PM, Karl von

[#344526] Re: Why, oh why, _why? — Todd Benson <caduceass@...> 2009/08/22

On Sat, Aug 22, 2009 at 7:43 AM, Todd Benson<caduceass@gmail.com> wrote:

[#344404] How to convert string "/regexp/i" to /regexp/i - ? — Joao Silva <rubyforum@...>

When i try to use:

20 messages 2009/08/21

[#344462] Github and _why — John W Higgins <wishdev@...>

I'm about to get very nasty responses but this absolutely is a very bad

19 messages 2009/08/21
[#344467] Re: Github and _why — Tony Arcieri <tony@...> 2009/08/21

On Fri, Aug 21, 2009 at 10:38 AM, John W Higgins <wishdev@gmail.com> wrote:

[#344545] 1.8.7 String#lines keeps new-line chars (say it ain't so in 1.9) — Intransition <transfire@...>

Ruby 1.8.7 p72

19 messages 2009/08/22

[#344554] Ruby Editor — sasan <sasan.bahrieh@...>

I need a good software for ruby programming. please post message for

21 messages 2009/08/22

[#344573] ruby-debug does not hit breakpoints at class-methods — Sys Ppp <systemppp@...>

ruby-1.8.6-p369

19 messages 2009/08/22
[#344593] Re: ruby-debug does not hit breakpoints at class-methods — 7stud -- <bbxx789_05ss@...> 2009/08/23

...and more

[#344597] Re: ruby-debug does not hit breakpoints at class-methods — Sys Ppp <systemppp@...> 2009/08/23

> $ rdebug r2test.rb

[#344652] Re: ruby-debug does not hit breakpoints at class-methods — 7stud -- <bbxx789_05ss@...> 2009/08/24

Sys Ppp wrote:

[#344653] Re: ruby-debug does not hit breakpoints at class-methods — 7stud -- <bbxx789_05ss@...> 2009/08/24

...or I guess this would be a better example:

[#344656] Re: ruby-debug does not hit breakpoints at class-methods — Sys Ppp <systemppp@...> 2009/08/24

To 7stud. These are all normal, except class-method, as i wrote.

[#344691] Re: ruby-debug does not hit breakpoints at class-methods — Rick DeNatale <rick.denatale@...> 2009/08/24

On Sun, Aug 23, 2009 at 11:50 PM, Sys Ppp<systemppp@gmail.com> wrote:

[#344705] Re: ruby-debug does not hit breakpoints at class-methods — Sys Ppp <systemppp@...> 2009/08/24

Rick Denatale wrote:

[#344580] Development - works, production not - why? — Joao Silva <rubyforum@...>

My development envrioment:

11 messages 2009/08/23

[#344680] Comparison Ruby, Python, Php, Groovy ecc. — Marco Mastrodonato <m.mastrodonato@...>

Comparison script languages for the fractal geometry, these are the

25 messages 2009/08/24
[#344684] Re: Comparison Ruby, Python, Php, Groovy ecc. — Urabe Shyouhei <shyouhei@...> 2009/08/24

Are those executables compiled with identical compilers + compile flags?

[#344717] _why's "suicide" note? — Graham Agnew <graham.agnew@...>

Just found this as _why's last tweet on the Google cached copy of _why's

12 messages 2009/08/24

[#344762] Calling method from another class — Kostas Lps <louposk@...>

Hi guys,

15 messages 2009/08/24

[#344872] ||= with 1.8 and 1.9 ? — Aldric Giacomoni <aldric@...>

A friend of mine on Twitter recently posted this tidbit of code:

30 messages 2009/08/26
[#344879] Re: ||= with 1.8 and 1.9 ? — Brian Candler <b.candler@...> 2009/08/26

Aldric Giacomoni wrote:

[#344899] Re: ||= with 1.8 and 1.9 ? — Rick DeNatale <rick.denatale@...> 2009/08/26

On Wed, Aug 26, 2009 at 11:08 AM, Brian Candler<b.candler@pobox.com> wrote:

[#344921] Re: ||= with 1.8 and 1.9 ? — Brian Candler <b.candler@...> 2009/08/26

Rick Denatale wrote:

[#344923] Re: ||= with 1.8 and 1.9 ? — Joel VanderWerf <vjoel@...> 2009/08/26

Brian Candler wrote:

[#344881] # sign does not work as expected form irb — Salvador Sanjuan <salvador.sanjuan@...>

I have just started Ruby. I have tried to do some exercises usin irb but

15 messages 2009/08/26
[#344887] Re: # sign does not work as expected form irb — Aldric Giacomoni <aldric@...> 2009/08/26

Salvador Sanjuan wrote:

[#344988] Re: # sign does not work as expected form irb — Salvador Sanjuan <salvador.sanjuan@...> 2009/08/27

Aldric Giacomoni wrote:

[#344938] Rack must not dictate how to create a middleware — Sys Ppp <systemppp@...>

In current realization of Rack::Builder the method :use dictates that

15 messages 2009/08/26
[#344940] Re: Rack must not dictate how to create a middleware — Brian Candler <b.candler@...> 2009/08/26

Sys Ppp wrote:

[#345037] Possible to use Ruby for Dynamic HTML sites without Rails? — Frank Peterson <fictionalperson@...>

How easy is this to do? I've been going though a Ruby book again (was

13 messages 2009/08/27

[#345070] I need a string#all_indices method--is there such a thing? — timr <timrandg@...>

In ruby you can use string#index as follows:

22 messages 2009/08/28

[#345079] #map, #select semantics — James Coglan <jcoglan@...>

I imagine this has come up before, though I can't find anything about it. I

16 messages 2009/08/28

[#345097] How to call this method — Robert Dober <robert.dober@...>

Hi list

15 messages 2009/08/28
[#345100] Re: How to call this method — Robert Klemme <shortcutter@...> 2009/08/28

2009/8/28 Robert Dober <robert.dober@gmail.com>:

[#345222] Sorting an array by multiple elements? — Paul <tester.paul@...>

Hi there, I have an array of arrays that I want to sort by multiple

14 messages 2009/08/30

[#345267] What is the ruby conventions to name private method? — pierr <pierr.chen@...>

16 messages 2009/08/31
[#345274] Re: What is the ruby conventions to name private method? — Ryan Davis <ryand-ruby@...> 2009/08/31

[#345322] help on phps $$ equivalent in ruby — Arthur Rats <simon.jacobs.ams@...>

i just cant find this anywhere, googling for a while and read up tons on

11 messages 2009/08/31

Re: Array Troubles

From: Josh Cheek <josh.cheek@...>
Date: 2009-08-24 18:42:03 UTC
List: ruby-talk #344732
On Mon, Aug 24, 2009 at 3:57 AM, Scott Andrechek
<scottandrechek@gmail.com>wrote:

> I've made this small table making program (not reall trademarked) and
> have been trying to add the ability to make your own title. Every time
> it goes to make the table i get this message: tablemaker.rb:38:
> undefined method `rjust' for nil:NilClass (NoMethodError). Here is the
> code:
>
> thisisthewordpage=['page']
> thisisthetitle=[]
> tableZZZ=0
> tableZZ=0
> tableZ=0
> pagesZ=0
> pagesZZ=0
> play=true
> puts 'Please type your title for your table (if you type nothing the
> title will be Table of Contents)'
> toptitle=gets.chomp
> if toptitle==''
> toptitle='Table of Contents'
> thisisthetitle.push toptitle
> if toptitle !=''
> thisisthetitle.push toptitle
> end
> end
> puts 'Please type your titles in first'
> table= []
> while (title=gets.chomp)!= ''
> table.push title
> tableZ+=1
> end
> puts 'Please type your page numbers'
> pages= []
> puts table[tableZZZ]
> while (page=gets.chomp)!= ''
> tableZZZ+=1
> puts table[tableZZZ]
> pages.push page
> pagesZ+=1
> end
> linewidth0=55
> linewidth1=45
> linewidth2=60
> linewidth3=10
> linewidth4=5
> puts (thisisthetitle[0].rjust(linewidth1)) # This is line 38
> while play==true
>  if tableZ!=0
>  puts (table[tableZZ].ljust(linewidth2))+
> (thisisthewordpage[0].rjust(linewidth3)) + '' +
> (pages[pagesZZ].rjust(linewidth4))
>  tableZ+=-1
>  tableZZ+=1
>  pagesZ+=-1
>  pagesZZ+=1
>  if tableZ==0
>    play=false
>  end
> end
> end
> if play==false
> puts ''
> puts 'Table Created by Table MakerTM'
> end
>
> Any help as always is greatly appreciated.
> -Scott Andrechek
> --
> Posted via http://www.ruby-forum.com/.
>
>
Hi, Scott,
The ruby syntax is
if
elsif
else
end

In your example, you did
if toptitle==''
   if toptitle !=''
  end
end

So you were actually nesting if statements. However the inner if statement
was guaranteed to never be true, because it was the negation of the first if
statement. What you could do instead is
if toptitle == ''
else  #by default, this means that toptitle!=''
end

I refactored the code a bit (I tried not to vary too much from your format).
There were some places that were getting a little bit convoluted, keeping
track of lots of counters, and incrementing / decrementing them as you went
through the array. There were also some variables that I thought would be
better off being a different type. I renamed some variables to follow more
rubyish conventions.



# get the table title
puts 'Please type the title for your table (if you type nothing the title
will be Table of Contents)'
table_title = gets.chomp  # not really any need to put this variable into an
array

table_title = 'Table of Contents' if table_title.empty? #empty string will
return true

# get the chapter titles, place them into the array
# split turns our string into an array, it uses a comma for a delimiter
because I passed it
#   a comma in a string.
# map! just loops through each element in the array, and replaces the array
element with
#   the last line of the submitted block.
#   the ! indicates that it does it to the array we are calling it on.
Without the !, it would
#   return a new array with those elements
#   the |t| says that we want to access the current element (a title)
through a variable named t
# strip removes leading and tailing whitespace from a string
# documentation for split
http://www.ruby-doc.org/core/classes/String.html#M000803
# documentation for map!
http://www.ruby-doc.org/core/classes/Array.html#M002190
# documentation for strip
http://www.ruby-doc.org/core/classes/String.html#M000820
puts 'Please type your titles in one line, separated by commas.'
table = gets.split(',').map!{|t| t.strip}  # so this could be expressed in
English as "get the next line,
                                           # split it into an array of
titles, and replace each title in
                                           # the array with the same title,
after whitespace has been removed"
                                           # this is also why we don't have
to say gets.chomp, because \n is whitespace


# get the page numbers
# replace the chapter titles with an array containing the chapter title, and
the page number
# note that map!{...} and map do ... end can both be used,
# I usually use {} for single line blocks, and do end for multi line blocks
puts 'Please type your page numbers'
table.map! do |chapter_title|
  print "The page number for " + chapter_title.inspect + " should be: "
  [chapter_title , gets.chomp]
end



# initializations for printing out the table

# I think a hash makes a lot of sense here, because you were having to
remember that specific numbers
# correllate to specific places to use the line widths, if we use a hash, we
can essentially label which
# values are which. For our keys, we use symbols, these are similar to
strings, but they all point to
# the same object. (you could replace them with strings if it made you feel
more comfortable)
# documentation for hash http://www.ruby-doc.org/core/classes/Hash.html
# documentation for Symbol http://www.ruby-doc.org/core/classes/Symbol.html
line_widths = { :table_title    =>  45 ,
                :chapter_title  =>  60 ,
                :word_page      =>  10 ,
                :page_number    =>  5  }

word_page = 'page' # not really any need for this variable to be an array


# print out the table title
puts
puts table_title.rjust( line_widths[:table_title] ) #pull the appropriate
width from the hash, notice how
                                                    #much it looks like
accessing an index in an array

# print out the table
# here we use the each method, which loops through each element in the array
# we pass it a block by using do |parameters| ... end
# in this case, we are receiving one parameter, the array [chapter_title ,
page_number]
# this was set back when we took the page numbers
# we can group our parameters together with () so that this ultimately
becomes
# chapter_title , page_number = [ "some chapter title" , "12" ]
# which is a common Ruby way of assigning values, try it out if you like.
table.each do |(chapter_title,page_number)|
  #when the argument is the last thing on the line, you don't actually need
parentheses
  print chapter_title.ljust line_widths[ :chapter_title ]
  print word_page.rjust     line_widths[ :word_page     ]
  puts  page_number.rjust   line_widths[ :page_number   ]
end
puts
puts 'Table Created by Table MakerTM'

# now, for some real fun, you should try turning it into a class ^_^

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