I would like to create the id portion of a <td> tag using a string
variable. In my program i have a table that will have a varying number
of columns determined by a variable in the parameter file, $gItems. I
would like to be able to loop through each row labeling each column
based on its column number as shown below. The problem is i do not know
how to have the variable "item" read into the tag. Any solution or
other suggestion on how to solve this problem would be appreciated.
[code]
<table>
<tr>
<%for item in 0..$gItems%>
<td id="col" + item.to_s >
<%= "col" + item.to_s %>
</td>
<%end%>
</tr>
</table>
[/code]
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Ryan F. wrote in post #968899:> I would like to create the id portion of a <td> tag using a string > variable. In my program i have a table that will have a varying number > of columns determined by a variable in the parameter file, $gItems.NO! NO! NO! NEVER USE GLOBAL VARIABLES FOR THIS SORT OF THING! OK, now that I''ve got your attention :) , please explain what you''re trying to do with $gItems. There will be a more appropriate place to put it than in a global variable; we just have to figure out what it is. I> would like to be able to loop through each row labeling each column > based on its column number as shown below. The problem is i do not know > how to have the variable "item" read into the tag. Any solution or > other suggestion on how to solve this problem would be appreciated.You can do this the same way you''ve done it on the next line. ERb <%= %> can go anywhere. Note, however, that Haml is generally a superior alternative to ERb, and in this case it provides an easier way to do this with its %tag[object] syntax.> > [code] > <table> > <tr> > <%for item in 0..$gItems%> > <td id="col" + item.to_s > > <%= "col" + item.to_s %> > </td> > <%end%> > </tr> > </table> > [/code]Best, -- Marnen Laibow-Koser http://www.marnen.org marnen-sbuyVjPbboAdnm+yROfE0A@public.gmane.org -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
First thank you for your quick response. This forum seems like a place I will be able to learn some proper rails coding.> NO! NO! NO! NEVER USE GLOBAL VARIABLES FOR THIS SORT OF THING!I have never programmed in ruby and have inherited this application to only make a few small changes. Unfortunately the original programmer used 50+ global variables and I really do not want to rewrite everything.> OK, now that I''ve got your attention :) , please explain what you''re > trying to do with $gItems. There will be a more appropriate place to > put it than in a global variable; we just have to figure out what it is.this app has a parameter file where the number of items can be changed. Depending on the integer that is placed in the parameter file, the view must create a table element with the appropriate number of columns ($gItems). $gItems is created in ApplicationController class the first time someone navigates to the Auctioneer view from the auctioneer_controller class index method. This allows each subsequent client screen to draw a table showing the appropriate number of items. I feel like my explanation is very convoluted, as is the code. let me know if i should break it down further. One thing to note might be that this app is not database backed. This is probably why the original programmer constantly used globals.> Note, however, that Haml is generally a superior alternative to ERb, and > in this case it provides an easier way to do this with its %tag[object] > syntax.thanks, I like the look of Haml and will look into it further. -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
Ryan F. wrote in post #968910:> First thank you for your quick response. This forum seems like a place > I will be able to learn some proper rails coding. > >> NO! NO! NO! NEVER USE GLOBAL VARIABLES FOR THIS SORT OF THING! > > I have never programmed in ruby and have inherited this application to > only make a few small changes. Unfortunately the original programmer > used 50+ global variables and I really do not want to rewrite > everything.You may not have to, but it''s usually a good idea to improve the parts you''re working on. If the original programming is this bad, I assume there is little or no test coverage? If that''s the case, then I advise getting familiar with RSpec and Cucumber, and writing tests for anything you have to change (so you know you''re not breaking things). Then do all new development test-first.> >> OK, now that I''ve got your attention :) , please explain what you''re >> trying to do with $gItems. There will be a more appropriate place to >> put it than in a global variable; we just have to figure out what it is. > > this app has a parameter file where the number of items can be changed. > Depending on the integer that is placed in the parameter file, the view > must create a table element with the appropriate number of columns > ($gItems). $gItems is created in ApplicationController class the first > time someone navigates to the Auctioneer view from the > auctioneer_controller class index method. This allows each subsequent > client screen to draw a table showing the appropriate number of items.That''s dreadful -- and easy to fix. Read it from the config file as before, but assign it to a class constant or something. See http://railscasts.com/episodes/85-yaml-configuration-file for some ideas.> I feel like my explanation is very convoluted, as is the code. let me > know if i should break it down further.I *think* I understand...> > One thing to note might be that this app is not database backed.Then why is it using Rails in the first place, I wonder?> This > is probably why the original programmer constantly used globals.Perhaps. The fact that the original programmer also used Hungarian Notation and CamelCase suggests that he wasn''t too familiar with Ruby idioms at all...> >> Note, however, that Haml is generally a superior alternative to ERb, and >> in this case it provides an easier way to do this with its %tag[object] >> syntax. > > thanks, I like the look of Haml and will look into it further.Best, -- Marnen Laibow-Koser http://www.marnen.org marnen-sbuyVjPbboAdnm+yROfE0A@public.gmane.org -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
On 16 December 2010 18:20, Ryan F. <lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org> wrote:> I have never programmed in rubyhmmm... I''m going to say "sorry" in advance, in case this seems a little harsh - it''s not meant to be, but just my arm''s length evaluation of your situation. Is it really a good solution for you to be making amendments to this site? Given that the original developer obviously wasn''t massively proficient with Ruby/Rails idiom and good practice, and you confess to being new to the language too, isn''t it most likely that whatever changes you make are going to increase the entropy of the system rather than reduce it? Are there no Ruby-experienced freelancers in your area you could engage for a little help? If only to show you how to achieve what you need doing, and check it after you''ve done it? I raise the point, not to belittle your attempts at picking through the code you''ve inherited (and let me guess... the original developer didn''t write many comments.... they never do!), but just from my experience, you might regret increasing the complexity/spaghetti when you look back at it after you have gained some more experience with Ruby (it''s such a beautiful language... and so many people butcher it :-/ All the best, Michael PS <% for item in 0..$gItems %> <td id="col<%=h item.to_s %>"> <%= "col" + item.to_s %> </td> <% end %> blurgh! ;-) -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
Its not harsh...its the truth. I am having a lot of trouble understanding the uniqueness of the rails language. To add to the difficulty this is my first time working on a web app. I usually only write socket based client/server apps, but I am going to look at this as a chance to expand my knowledge. In all honesty i dont know if i would ever use rails again because i have no need for the db and could just as easily write the program in something im slightly (very slightly) more familiar with like java. -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.