For issues relating to developing in Ruby, version 1.9.3. If your question applies to Ruby in general, use the tag [tag:ruby].
Questions tagged [ruby-1.9.3]
495 questions
0
votes
1 answer
Optimization when transiting through states (tail recursion optimization)
When I have a code that transits through finite states for arbitrary many times as in the following example,
def a
...
case some_condition
when :foo then a
when :bar then b
else c
end
end
def b
...
case…
sawa
- 165,429
- 45
- 277
- 381
0
votes
1 answer
Overwriting part of a string
Is there a simple way to overwrite a string, something like the following, or something similar?
s = "123456"
r1 = "abc"
s.loverwrite(r1) # => "abc456"
s.coverwrite(r1) # => "12abc6" (or "1abc56")
s.roverwrite(r1) # => "123abc"
r2 =…
sawa
- 165,429
- 45
- 277
- 381
0
votes
1 answer
Validation to model either this or that but must have one Rails?
I have 3 Models
class Audio
end
class Album
end
class Movie
end
I want to have validation in Audio model.That while creating Audio the server should validate that the audio is linked with the album or movie or both. But both the fields selecting…
vidur punj
- 5,019
- 4
- 46
- 65
0
votes
2 answers
Problems with Macports Ruby19 Install
I'm learning Rails and fairly new to Macports.
I receive the following error when running rails server for my project:
/...config/initializers/session_store.rb:3: syntax error, unexpected ':', expecting $end
I believe this syntax error is caused by…
benedict_w
- 3,543
- 1
- 32
- 49
0
votes
1 answer
Print require time for booting up
How do I print the require time of my files so that I can debug a slow application boot time.
I envision something like this:
$ rails s
$ app/models/user.rb took 300 milliseconds
$ ...
$ lib/connect.rb took 5000 milliseconds
Would I have to…
maletor
- 7,072
- 7
- 42
- 63
0
votes
2 answers
Merge and convert arrays to hash in Ruby
There are 4 arrays in Ruby
array1 = ["label1.1", "label1.2", "label1.3", "label1.4"]
array2 = ["data1.1", "data1.2", "data1.3", "data1.4"]
array3 = ["label2.1", "label2.2", "label2.3", "label2.4"]
array4 = ["data2.1", "data2.2", "data2.3",…
user266003
0
votes
1 answer
Parsing date in Ruby
I need a date of birth as a plain text in Ruby on Rails application. So here is the main part of a code I'm using to do it
if @date_of_birth_as_text.present? and Date.parse(@date_of_birth_as_text).nil?
errors.add :date_of_birth_as_text,…
user266003
0
votes
1 answer
Can't mass-assign protected attributes issue using devise signup form
I am using rails 3.1 and ruby 1.9.3 for my application.
And the issue is, I am getting "Can't mass-assign protected attributes" while saving the details.
I have User model as:
class User < ActiveRecord::Base
# Include default devise modules. Others…
Subrahmanyam Konduri
- 163
- 1
- 11
0
votes
1 answer
How to inspect Module#initialize?
I have defined a module Vehicle such that
module Vehicle
def initialize(make, model)
end
def start
end
def stop
end
end
I want to inspect the instance methods defined in Vehicle using Module#instance_methods and Module#instance_method…
Mike Bradford
- 240
- 2
- 10
0
votes
2 answers
Rails 3 and Bootstrap 2.1.0 - can't fix my footer
I have Rails application with bootstrap 2.1.0 (i use twitter-bootstrap-rails gem for that). But i can't get working footer. It is not visible unless i scroll down the page. I can't get how to fix that.
Application.html.haml
!!!
%html
%head
…
ExiRe
- 4,727
- 7
- 47
- 92
0
votes
2 answers
Passing Multiple Parameters in a form_tag
I'm using Rails and jqPlot to display some data on a webpage. The graph needs to be flexible by date (as in, the user can select a time range, and the graph will update itself). Here's my code so far (in my View):
<%= form_tag…
XML Slayer
- 1,530
- 14
- 31
0
votes
2 answers
Kernel.lambda() not returning a lambda Proc in Ruby 1.9
I'm writing a simple event bus to use in an application. This part works fine:
#!/usr/bin/env ruby
module EventBus
@callbacks = {}
module_function
def on event, &callback
@callbacks[event] ||= []
@callbacks[event].push callback
…
bkconrad
- 2,620
- 3
- 20
- 30
0
votes
1 answer
Add unique key values to a hash and creating a dictionary out of it
I am a beginner trying to learn ruby and I am writing a code for following problem statement:
- Create a dictionary which is initially empty.
- add entries to it.. the word should be the key and meanings should be values.
- add whole entries with…
user1546386
- 21
- 3
0
votes
3 answers
RegEx, How to get all matches and group? Ruby 1.9.3p125
Let's say I have the following string:
google-com, Awesome-net(Ooops), facebook-com / rocket-yet
I want to extract all the words ending with -com but have them grouped.
For now, I have tried:
^\w+[-]com
That works fine but only catches the first…
Kleber S.
- 8,110
- 6
- 43
- 69
0
votes
1 answer
ActiveRecord Delete...?
I'm just starting to learn ActiveRecord, and I am just trying out little things to figure out how everything works. I just tried the following code on the following sqlite3 database.
Ruby:
class Balances < ActiveRecord::Base
def initialize
…
Bobby Tables
- 1,154
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- 25