[#387246] newbie question — sunny parker <info@2020proj.com>

i am coming from php and dont seem to quite understand how ruby works

13 messages 2011/09/01

[#387330] installing naive bayes classifier — aya abdelsalam <ayoya_91@...>

Hello

10 messages 2011/09/02

[#387344] Beginner needing help - Writing right-angle triangle program — Kane Williams <theburrick@...>

I've been going through a Haskell tutorial (Just to see what it's like)

12 messages 2011/09/03

[#387356] Which version should I download? — Vladimir Van Bauenhoffer <cluny_gisslaren@...>

Im new to programming and Im thinking of downloading and starting with

17 messages 2011/09/03

[#387392] loops problem — jack jones <shehio_22@...>

for (j = @array.length ; j > counter ; j = j-1) # counter is a variable

13 messages 2011/09/04

[#387469] posts on Unix systems programming — Eric Wong <normalperson@...>

I would like to do a series of mailing list posts on the subject of Unix

28 messages 2011/09/06

[#387530] Unexpected behavior of Ruby array — Suvankar Satpati <suvankar.17@...>

I was going through the exercises at http://rubykoans.com/ and got

11 messages 2011/09/08

[#387544] Executing the output of a look — dwight schrute <spambocks@...>

Hi,

14 messages 2011/09/08

[#387586] Creating a hash from two arrays — simon harrison <simonharrison.uk@...>

Hi. Can anyone help with this? I'd like to end with a hash like so:

15 messages 2011/09/09

[#387596] newbie ruby installation malloc issue — "mark e." <mark_f_edwards@...>

hi all -

12 messages 2011/09/09

[#387614] how to write data in binary to a file? — frank hi <yw_hi@163.com>

Hi,

11 messages 2011/09/10

[#387646] How do I make output generate a float without an excess numbers of decimal places? — Kane Williams <theburrick@...>

For example, my current code is

11 messages 2011/09/11

[#387725] Any downsides to writing paranthesises? — Vladimir Van Bauenhoffer <cluny_gisslaren@...>

Im a newbie programmer who is trying to learn Ruby after having just

18 messages 2011/09/12

[#387811] Get interpreter path — Michal Suchanek <hramrach@...>

Hello,

26 messages 2011/09/14
[#387842] Re: Get interpreter path — Phillip Gawlowski <cmdjackryan@...> 2011/09/14

On Wed, Sep 14, 2011 at 3:35 PM, Michal Suchanek <hramrach@centrum.cz> wrot=

[#387844] Re: Get interpreter path — Michal Suchanek <hramrach@...> 2011/09/14

On 14 September 2011 20:47, Phillip Gawlowski <cmdjackryan@gmail.com> wrote:

[#387814] Tough Ruby Homework — Rory Pascua <rorypascua@...>

I'm trying to take a long piece of text, find a word, and get that word

18 messages 2011/09/14

[#387853] Can I Safely Use Rubinius While Learning? — Aaron Jackson <jacksonaaronc@...>

Greetings,

18 messages 2011/09/15

[#387915] Some newbie questions — Vladimir Van Bauenhoffer <cluny_gisslaren@...>

I got some newbie questions which I would very much appreciate if

14 messages 2011/09/15

[#388003] Ruby Speed Question — Kevin Anon <oblivious.sage@...>

Wrote my first Ruby program recently for a class assignment where we had

12 messages 2011/09/18

[#388078] appending \n to each element in an array — Joe Collins <joec_49@...>

I have an array

13 messages 2011/09/20

[#388123] Turning on a special program at special time and turning off the computer at another special time — "amir e." <aef1370@...>

I decided to write a program in RUBY wherein these items have been done

11 messages 2011/09/21
[#388124] Re: Turning on a special program at special time and turning off the computer at another special time — andrew mcelroy <sophrinix@...> 2011/09/21

That sounds like a program a special program a terrorist would write. Are

[#388198] Conditional statements with multiple arguments — "Thomas B." <sinixlol@...>

Good afternoon everyone,

18 messages 2011/09/24

[#388203] Ruby 1.9.3 RC1 is out — "Yuki Sonoda (Yugui)" <yugui@...>

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19 messages 2011/09/24
[#388208] Re: [ANN] Ruby 1.9.3 RC1 is out — Quintus <sutniuq@...> 2011/09/24

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[#388209] Re: [ANN] Ruby 1.9.3 RC1 is out — Chris White <cwprogram@...> 2011/09/24

[#388214] Re: [ANN] Ruby 1.9.3 RC1 is out — Quintus <sutniuq@...> 2011/09/24

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[#388216] Re: [ANN] Ruby 1.9.3 RC1 is out — Yusuke Endoh <mame@...> 2011/09/24

Hello,

[#388248] Looking for better/familiar approach to command line opts — "Perl J." <perljunkie@...>

So I guess the warning to the reader upfront is... I'm a bit of a Perl

14 messages 2011/09/25

[#388333] Get all classes from a list of files — Jeroen van Ingen <jeroeningen@...>

I have a list of ruby files. I would like to create objects from all

11 messages 2011/09/28

[#388342] Ruby Syntax @keywords ||= [ ] — Bhavesh Sharma <sharmabhavesh@...>

Sorry if this comes across as a dumb question, but what does the

11 messages 2011/09/28

[#388366] IO.readlines will not accept variable with file name Why? — Joda jenson <jodajen2@...>

I am fairly new to Ruby and I am stuck on this. Would someone have a

13 messages 2011/09/29
[#388368] Re: IO.readlines will not accept variable with file name Why? — Robert Klemme <shortcutter@...> 2011/09/29

On Thu, Sep 29, 2011 at 11:14 AM, Joda jenson <jodajen2@yahoo.com> wrote:

Re: how to write data in binary to a file?

From: Brian Candler <b.candler@...>
Date: 2011-09-11 03:15:20 UTC
List: ruby-talk #387639
Phillip Gawlowski wrote in post #1021166:
> On Sat, Sep 10, 2011 at 6:52 PM, Brian Candler <b.candler@pobox.com>
> wrote:
>> irb(main):005:0> f2.write("gro")
>> =3D> 5
>>
>> Normally, transcoding a UTF-8 string (which contains non-ASCII
>> characters) to ASCII-8BIT would raise an exception:
>
> You obviously aren't aware what Extended ASCII (aka ASCII 8bit) is.

I'm not? Then please explain it to me. What I know so far about ruby 1.9 =

encoding I have documented at =

https://github.com/candlerb/string19/blob/master/string19.rb

There are some 200+ behaviours there, reverse-engineered with tests.

However, I'm quite happy to have gaps in my knowledge filled out.

> Take a look at ISO 8859-1, and check what 11011111 encodes.

What has ISO-8859-1 got to do with this?

*If* the file had an external encoding of ISO-8859-1, then the character =

"=C3=9F" (two bytes in UTF-8) would have been translated to the single by=
te =

0xDF as it was written out.

But in this example, the external encoding is ASCII-8BIT, which is =

ruby's encoding for "ASCII characters in the low 128 values, and unknown =

binary in the high 128 values"

Ruby does not let you transcode UTF-8 to ASCII-8BIT, or back again, if =

there are any high-value characters in it. You can confirm this easily:

>> s1 =3D "gro=C3=9F"
=3D> "gro=C3=9F"
>> s1.encode("ASCII-8BIT")
Encoding::UndefinedConversionError: U+00DF from UTF-8 to ASCII-8BIT
  from (irb):2:in `encode'
  from (irb):2
  from /usr/local/bin/irb192:12:in `<main>'
>> s2 =3D "gro\xDF".force_encoding("ASCII-8BIT")
=3D> "gro\xDF"
>> s2.encode("UTF-8")
Encoding::UndefinedConversionError: "\xDF" from ASCII-8BIT to UTF-8
  from (irb):4:in `encode'
  from (irb):4
  from /usr/local/bin/irb192:12:in `<main>'

Now, if you open a file for write and set an external encoding (the =

default is nil) it means "transcode to this encoding". But for some =

reason, setting external encoding to ASCII-8BIT bypasses this rule.

-- =

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

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