[#362083] Teaching Programming Languages (including Ruby) — Samuel Williams <space.ship.traveller@...>

Hello,

20 messages 2010/05/02

[#362098] Main working window for Ruby is DOS? — Kaye Ng <sbstn26@...>

I know nothing about programming and am not a techy person, so please

16 messages 2010/05/03

[#362116] School teacher still at it learning programming language — Hilary Bailey <my77elephants@...>

Now I while glimpsing at the beauty of Ruby, there is the software of

11 messages 2010/05/03

[#362166] Something I expected to work, but didn't! — Kurtis Rainbolt-greene <kurtisrainboltgreene@...>

irb(main):001:0> x = 2

11 messages 2010/05/04

[#362215] for-in vs. map closures — Mike Austin <mike_ekim@...>

I was experimenting with closures and JavaScript's and Ruby's

11 messages 2010/05/05

[#362286] ri on sqlite — Intransition <transfire@...>

What do others think of a creating a new ri tool which uses a SQLite

17 messages 2010/05/06

[#362341] ease of porting (translating) ruby to C (vs. python)? — bwv549 <jtprince@...>

In a very small bioinformatics group I know of, they are deciding

17 messages 2010/05/07

[#362375] Strings iteration — Viorel <viorelvladu@...>

I have some names like aaxxbbyy where xx is '01'..'10' and yy is also

14 messages 2010/05/08

[#362425] Any future for curses applications/toolkits like rbcurse ? — "R. Kumar" <sentinel.2001@...>

Have apps moved over to the web (or GUI) totally ? Will there be any

21 messages 2010/05/10
[#362441] Re: Any future for curses applications/toolkits like rbcurse ? — botp <botpena@...> 2010/05/10

On Mon, May 10, 2010 at 2:13 PM, R. Kumar <sentinel.2001@gmx.com> wrote:

[#362448] Re: Any future for curses applications/toolkits like rbcurse ? — "R. Kumar" <sentinel.2001@...> 2010/05/10

interface and/or the installation itself is terrible.

[#362458] Re: Any future for curses applications/toolkits like rbcurse ? — botp <botpena@...> 2010/05/10

On Mon, May 10, 2010 at 10:28 PM, R. Kumar <sentinel.2001@gmx.com> wrote:

[#362460] Re: Any future for curses applications/toolkits like rbcurse ? — "R. Kumar" <sentinel.2001@...> 2010/05/10

botp wrote:

[#362463] Re: Any future for curses applications/toolkits like rbcurse ? — "R. Kumar" <sentinel.2001@...> 2010/05/10

Strange. I cant push a gem even after yanking.

[#362452] Unit Test of method calling system() - how? — Martin Hansen <mail@...>

How can I unit test the two methods:

16 messages 2010/05/10

[#362498] In Ruby, can the coerce() method know what operator it is th — Jian Lin <blueskybreeze@...>

In Ruby, it seems that a lot of coerce() help can be done by

12 messages 2010/05/11
[#362546] Re: In Ruby, can the coerce() method know what operator it is th — Caleb Clausen <vikkous@...> 2010/05/11

On 5/10/10, Jian Lin <blueskybreeze@gmail.com> wrote:

[#362611] Re: In Ruby, can the coerce() method know what operator it is th — Colin Bartlett <colinb2r@...> 2010/05/12

On Tue, May 11, 2010 at 4:46 PM, Caleb Clausen <vikkous@gmail.com> wrote:

[#362657] Asynchronous HTTP request — Daniel DeLorme <dan-ml@...42.com>

Does anyone know how to do the following, but without threads, purely

28 messages 2010/05/13

[#362718] Range on strings. — Vikrant Chaudhary <nasa42@...>

Hi,

13 messages 2010/05/14

[#362787] class best way for getters ? — unbewusst.sein@... (Une B騅ue)

i have a class "HFSFile" initialized by a parsed string

12 messages 2010/05/15

[#362979] curl library? — Xeno Campanoli / Eskimo North and Gmail <xeno.campanoli@...>

Two questions:

14 messages 2010/05/18
[#362980] Re: curl library? — Xeno Campanoli / Eskimo North and Gmail <xeno.campanoli@...> 2010/05/18

On 10-05-18 02:35 PM, Xeno Campanoli / Eskimo North and Gmail wrote:

[#362982] Re: curl library? — Luis Parravicini <lparravi@...> 2010/05/18

On Tue, May 18, 2010 at 6:56 PM, Xeno Campanoli / Eskimo North and

[#362984] Re: curl library? — Xeno Campanoli / Eskimo North and Gmail <xeno.campanoli@...> 2010/05/18

Well, I got that -dev thing installed with apt-get, and then I tried again and

[#363027] Retrieve instance — Walle Wallen <walle.sthlm@...>

Quick question. Can I somehow retrieve the instance of the class Test in

11 messages 2010/05/19

[#363076] Scrape javascript content — Phil Mcdonnell <phil.a.mcdonnell@...>

I'm trying to scrape a page that hides some data behind a javascript

11 messages 2010/05/20

[#363115] OMG, why are there so many Strings in ObjectSpace! — timr <timrandg@...>

I was playing around looking at ObjectSpace in irb and was astounded

14 messages 2010/05/21

[#363225] Redefine a Class? — Mark T <paradisaeidae@...>

Currently this raises: superclass mismatch for class Soda (TypeError)

12 messages 2010/05/25

[#363240] Funny IO.select behaviour — Dennis Nedry <dennis@...>

I've been debugging my full screen console ruby editor.

13 messages 2010/05/25

[#363348] Ruby as Client Side Language in Web Browser (replacing JS) — "Simone R." <k5mmx@...>

Hi everybody,

17 messages 2010/05/27

[#363412] A better way to write this function? — Jason Lillywhite <jason.lillywhite@...>

Here is my attempt at Newton's second law in Ruby:

14 messages 2010/05/28

[#363417] Interrupting the evaluation of a ruby script — Emmanuel Emmanuel <emmanuel.bacry@...>

This is my problem :

12 messages 2010/05/28
[#363447] Re: Interrupting the evaluation of a ruby script — Branden Tanga <branden.tanga@...> 2010/05/28

Emmanuel Emmanuel wrote:

[#363483] Re: Interrupting the evaluation of a ruby script — Emmanuel Emmanuel <emmanuel.bacry@...> 2010/05/29

[#363426] A complete beginners question — Ant Walliams <anthonywainwright@...>

Hi there,

19 messages 2010/05/28

[#363432] Dynamic SVG with Ruby/Tk — Yotta Meter <spam@...>

The example I'm looking for in regards to ruby/SVG differs from the

14 messages 2010/05/28

[#363467] Date.today problem on linux with Ruby 1.8.6 — Jarmo Pertman <jarmo.p@...>

Hello.

10 messages 2010/05/29

[#363524] enumerator problem in 1.9.1 — Bug Free <amberarrow@...>

The following line:

19 messages 2010/05/31
[#363528] Re: enumerator problem in 1.9.1 — botp <botpena@...> 2010/05/31

On Mon, May 31, 2010 at 9:04 AM, Bug Free <amberarrow@yahoo.com> wrote:

[#363533] Re: enumerator problem in 1.9.1 — Robert Klemme <shortcutter@...> 2010/05/31

2010/5/31 botp <botpena@gmail.com>:

Re: for-in vs. map closures

From: Rick DeNatale <rick.denatale@...>
Date: 2010-05-06 12:51:30 UTC
List: ruby-talk #362305
On Thu, May 6, 2010 at 5:17 AM, Robert Dober <robert.dober@gmail.com> wrote=
:
> On Wed, May 5, 2010 at 11:50 PM, Mike Austin <mike_ekim@yahoo.com> wrote:
>>
>> So if a new context is created for every block call in map(), in
>> theory it should be slower than a for-in loop, correct? =A0I'll have to
>> try it when I get home.
>>
>> Mike
>>
>>
> No not really (at least for 1.9)
> http://gist.github.com/391953
> here is the output
> ruby -v loops.rb
> ruby 1.9.1p378 (2010-01-10 revision 26273) [i686-linux]
> Rehearsal ----------------------------------------
> loop =A0 1.340000 =A0 0.000000 =A0 1.340000 ( =A01.508669)
> each =A0 1.340000 =A0 0.010000 =A0 1.350000 ( =A01.388928)
> ------------------------------- total: 2.690000sec
>
> =A0 =A0 =A0 =A0 =A0 user =A0 =A0 system =A0 =A0 =A0total =A0 =A0 =A0 =A0r=
eal
> loop =A0 1.380000 =A0 0.010000 =A0 1.390000 ( =A01.419883)
> each =A0 1.370000 =A0 0.000000 =A0 1.370000 ( =A01.417870)
>
> ruby -v loops.rb
> ruby 1.8.7 (2009-06-12 patchlevel 174) [i486-linux]
> Rehearsal ----------------------------------------
> loop =A0 3.690000 =A0 0.650000 =A0 4.340000 ( =A04.927702)
> each =A0 4.570000 =A0 0.770000 =A0 5.340000 ( =A05.764859)
> ------------------------------- total: 9.680000sec
>
> =A0 =A0 =A0 =A0 =A0 user =A0 =A0 system =A0 =A0 =A0total =A0 =A0 =A0 =A0r=
eal
> loop =A0 4.000000 =A0 0.630000 =A0 4.630000 ( =A04.739408)
> each =A0 4.510000 =A0 0.680000 =A0 5.190000 ( =A05.489487)
>

And adding a third benchmark, using map like the original

http://gist.github.com/392080

under ruby 1.9.2

Rehearsal ----------------------------------------
loop   1.100000   0.140000   1.240000 (  1.500455)
each   1.060000   0.120000   1.180000 (  1.430910)
map    1.060000   0.080000   1.140000 (  1.315434)
------------------------------- total: 3.560000sec

           user     system      total        real
loop   1.090000   0.090000   1.180000 (  1.327022)
each   1.210000   0.100000   1.310000 (  1.491797)
map    1.080000   0.080000   1.160000 (  1.288349)

and under 1.8.7

Rehearsal ----------------------------------------
loop   2.950000   0.620000   3.570000 (  4.199053)
each   3.900000   0.210000   4.110000 (  4.849201)
map    4.610000   0.110000   4.720000 (  5.622664)
------------------------------ total: 12.400000sec

           user     system      total        real
loop   3.620000   0.200000   3.820000 (  4.475057)
each   4.760000   0.100000   4.860000 (  5.561921)
map    4.150000   0.400000   4.550000 (  5.249561)
ruby for_vs_each.rb  24.21s user 1.69s system 85% cpu 30.320 total


I would note that, since the loop case gives different results, and if
those results aren't the droids you are looking for, then the
performance doesn't really matter.  If I don't need to get the correct
results, I can write arbitrarily fast code <G>.

I almost never use for in Ruby, it makes me feel more like I'm writing
C or BASIC, or Algol, or even FORTRAN.

I always keep in mind that the order is 1. Make it run, 2. Make it
right, 3. Make it fast enough, 4. Make it small enough.

1 and 2 are mandatory, 3 and 4 depend on what enough means.




--=20
Rick DeNatale

Blog: http://talklikeaduck.denhaven2.com/
Github: http://github.com/rubyredrick
Twitter: @RickDeNatale
WWR: http://www.workingwithrails.com/person/9021-rick-denatale
LinkedIn: http://www.linkedin.com/in/rickdenatale

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