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Hi, Has anyone come across a Ruby mathematical expression parser, capable of parsing out token, replacing them with values then executing the mathematical formula? Nothing too heavy, A * (44/12) * ... etc. where A is can be replaced with a value. In Java there are serveral, like JEP, but I''d prefer it we could get a Ruby one now we have moved over to Rails, otherwise we will have to

Has anyone come across this problem... I created some Ruby files in Textmate on my Mac - and everything works fine. However, when I run those files on a Windows machine I get e.g. compile error ./script/../config/../app/views/station/consumption/new.rhtml:2: Invalid char `\002'' in expression ./script/../config/../app/views/station/consumption/new.rhtml:4: parse error, unexpected

Having jotted down some models, with some inheritence I tried to run some unit tests. After waiting for rake test_units to run I got a rake of errors (if you''ll forgive the play on words). The errors were to do with unknown tables in the tear down stage. The unknown tables corresponded to sub-types where single table inheritence was used. In other words, these tables *shouldn''t*

Hi, I realise that Windows is a poor platform and that Webrick is a development, not production, server. However, we have started seeing this crop up when perfectly simple page to page links are invoked... [2006-03-28 08:32:21] ERROR Errno::ECONNABORTED: Software caused connection abort /usr/lib/ruby/1.8/webrick/httpresponse.rb:324:in `write''

I just got this error: uninitialized constant PriceCurf After much head scratching I remembered the Rails plural to singular mapping rules. My table is price_curves, my object is PriceCurve ... whereas I am guessing Rails thinks the singular ought to br PriceCurf ?! I''m sure there is a simple way around this linguistic blunder that doesn''t involve the use of pigeon English.

As is often the case when I tackle a new platform/language, I get the big picture very quickly (because frameworks are frameworks are frameworks) but its the nitty-gritty of the language that bogs me down... So I have some similar methods on a few of my model classes that I wanted to push into a helper. Now I reckoned that the Ruby way was to create a module and mix it in with include. However, I

I want to make use of a form_remote_tag to submit a form asynchronously. Easy done. However, we also want to add an observe_form tag to check for some value changes while the form is being entered. The observe_form tag needs a dom id to work on but I can''t see how to enter an html option for the dom id of the form on the form_remote_tag. Any ideas? Here is the form tag so far...

Hi, As a long time Java/J2EE exponent I wanted to give Rails a fair crack of the whip and after we evaluated it for several weeks I have to say I like it. The installation process for the base system/framework is straightforward on the two platforms we''ve tried (Windows and Mac OS X). However, the charting components available, relying on ImageMagick or GraphicsMagick seem less clear

Hey all, I need to launce a rather lengthy process from a small Rails application. It''s the sort of thing (sending out an email newsletter) that would need to be launched from a browser window, but the browser doesn''t need to stick around to see it through. I played around with Thread.new, but I think, based on limited testing, that the threads need to complete before the view

Has anyone achieved a stable deployment of Gruff with Rmagick on Windows? I''ve been playing around with this on Instant Rails and after installing the RMagick win 32 gem (local gem install as per instructions on web) and then Gruff on top of that. I did a test controller method that rendered the fruit pie chart as per the examples on the gruff site. This worked. However, when I refreshed