similar to: Problem with select and each_with_index

When using array.each_with_index how do you start at a desired index position? I can do it like this, but its not very clean and doesnt seem efficient : desired_index_start = 20 array.each_with_index do |value,index| next if index<desired_index_start end Thanks Chris -- Posted via http://www.ruby-forum.com/.

Hi! If i have 2 tables i.e. product and images and product has_many images, image belongs_to product - how to create _form.rhtml, new/create and edit/update methods in product controller, so in a single form i can add one product and MANY (let''s assume for now that this number is fixed) images for this product? Pleeeeease help me :) -- Posted via http://www.ruby-forum.com/.

Hi All, My one server recently started acting very weird. At fist I couldn't import any images with cobbler as rsync crashes the whole time. I was told to ask on the cobbler list (maybe it's not supported here?) but I left it at that (subscribed to far too many lists already). Yesteday I wanted to copy some stuff from a USB disk to the server (using rsync to update the files which have

I have in my view the following: <% 0.upto(@num_performances) do |idx| -%> <%= text_field ''performance'', ''city'', :index => idx, %> <%= text_field ''performance'', ''venue'', :index => idx, %> <% end -%> and in my controller I have: @performance = [Performance.new("city" =>

Hi all, How does this look as a general approach to a SID.create method: # Creates and initializes def self.create(authority, *sub_authorities) if sub_authorities.length > 8 raise ArgumentError, ''maximum of 8 subauthorities allowed'' end authorities = Array.new(8, 0) authorities.replace(sub_authorities) count = authorities.select{ |e| e > 0 }.size

I have a form that I want to use to update multiple objects. In the controller, @grades = Grade.find(params[:grade].keys) @grades.each_with_index do |grade, i| grade.update_attribute(params[:grade][i]) end all_valid = @grades.inject(true) {|memo, c| c.valid? && memo } this doesn''t update the attributes as I would expect. (I would just use

Life times of one brand of light bulb were observed. Life hours of nine light bulbs were 898, 720, 354, 405, 620, 54, 229, 306, 890. There were three more light bulbs that were still burning after 1000 hours. It is common to assume the life time of a light bulb follows an exponential distribution. With the observed data find the MLE of the parameter of the exponential distribution with EM

Hi, all! Anyone know an easy way to specify the following model. Panel dataset, with stock through time, by firm. I want to run a model of y on a bunch of explanatory variables, and one dummy for each firm, which is 1 for observations that come from firm i, and 0 everywhere else. I have over 200 firms (and a factor variable that contains a firm identifier). Any easy way of going about

I have a model object that acts as a list. The position of each object is determined by two factors: number of votes ascending and age of object descending. When a user adds or deletes a vote I need to quickly update the associated model object''s position. Right now this is done with the following method: def update_position position = nil Bug.find(:all, :order =>

I''ve spent hours researching the subject and have tried many test sequences in IRB, and rails console but I''m just having trouble making headway into what is probably a very easy subject. I understand arrays with at least 4 other languages but with Ruby I haven''t found a mental connection with how I can assign variables to arrays.. Take for example: def

I''ve been messing around with Ferret (no punn intended). After spending some time testing it out (indexing to file), I decided to index about 10% of the data I want to eventually index. It took several hours to complete the index on my local machine, but it was created without any problems and after optimising it the searches returned results at the sort of speed I was expecting. I

Hi, I took the advice of Daniel O'Connor, found out what variables I had available to me, and put them in the conf. So now it looks like : [ellipse] driver = mge-shut port = /dev/cuaa0 desc = "UPS" lowbatt = 5 offdelay = 120 let the UPS charge up fully, 24 hours. I plugged a single lamp into it, with a 60W bulb. At 3:40p

Hello I need to check that the NHS numbers in my database are valid. I''m storing them as ten-digit strings: the first nine are the identifier and the tenth is a check digit. There are four steps to calculating the check digit (from http://www.connectingforhealth.nhs.uk/systemsandservices/nsts/docs/tech_nn_check_digit.pdf): 1. multiply each of the first nine digits by a weighting factor

Dear all, I have this line: <% $c_repo.split('','').each_with_index do |repo, i| %> in one of my template files and on the target node I''m getting this error: err: Could not retrieve catalog from remote server: Error 400 on SERVER: Failed to parse template zmfs/zmfs_prob.erb: private method `split'' called for nil:NilClass Any idea what am I missing?

I''m using a web service to retrieve an array of results to a search and a render :partial to display those results to the user, while at the same time putting the results into the session. Is there a way for my _book.rhtml file to have access to the index of the result currently being displayed, like each_with_index makes available to its block? This would allow me to have the

Hello all, I''ve come up w/ a worker class that manages queued jobs using a fixed number of child workers. Well, that''s not quite true -- a new worker is spawned for each job, but you set the total number that may exist at once. There are three components: 1) queue_worker.rb: The singleton worker that manages the child workers. You probably want to auto start this. Make sure you

My BackgrounDRb server intermittently bails out with the following exception in the middle of a long running task running on a Worker sub classed from BackgrounDRb::MetaWorker (the point at which it raises this exception is different each time it runs) /opt/local/lib/ruby/gems/1.8/gems/packet-0.1.5/lib/packet/packet_core.rb:145:in `schedule_write'': You have a nil object when you

I am making a browser-based game using ruby on rails and I am having trouble implementing a ranking system for my game. Each player has five skills: intelligence, creativity, strength, charisma and technological. I want the player to have a rank for each skill. The ranking I have in place right now gives the same rank if two players have the same amount of skill. SELECT COUNT(*) AS [rank] FROM

Hi all, Not really sure what to put in the title so hope people still open this! What I want to do is produce something like this Col1 Col2 Col3 data1 data2 data3 data4 data5 data6 data7 data8 data9 data.. data.. data.. data.. data.. data.. data-n data-n+1 data-n+2 I can get the data back from my db

Hi, If I have @answers in my Controller, which is an array of Answer model objects which don''t exist in the DB yet... How do I bind a text_area helper in the View to each Answer? (I''m pre-filling some of the Answers with other data people need to verify before submitting and will insert on POST.) I''ve been able to get the textareas to render but not with the