For issues relating to development in Ruby, version 2.4. If your question applies to Ruby in general, use the tag [ruby].
Questions tagged [ruby-2.4]
73 questions
46
votes
1 answer
What do these RubyInstaller 2.4 components do?
A few days ago, RubyInstaller 2.4 for Windows was released.
Upon installation, it asks me the following question.
_____ _ _____ _ _ _ ___
| __ \ | | |_ _| | | | | | |__ \
|…
Grilse
- 3,491
- 2
- 28
- 35
19
votes
1 answer
After Ruby 2.4 upgrade - error while trying to load the gem 'uglifier' (Bundler::GemRequireError)
I've just upgraded my App to use Ruby 2.4.0 without any errors during the bundling process. When I try to start my server, however, I get the following error:
There was an error while trying to load the gem 'uglifier'. (Bundler::GemRequireError)
Gem…
Severin
- 8,508
- 14
- 68
- 117
19
votes
4 answers
Is it possible to run a Rails 4.2 app on Ruby 2.4?
I want to try out a Rails 4.2 app on Ruby 2.4.
However, when I try doing it, I get errors about the json gem version 1.8.3 failing to install.
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
current directory:…
Andrew Grimm
- 78,473
- 57
- 200
- 338
8
votes
2 answers
Wait for a thread to die in Ruby
It appears that, in Ruby 2.4 and 2.5, threads don't die as soon as you invoke #kill on them. This code snippet will print Not dead a few times:
thread = Thread.new { loop {} }
thread.kill
puts "Not dead" while thread.alive?
I'd like to block…
Aaron Christiansen
- 11,584
- 5
- 52
- 78
8
votes
1 answer
How does Ruby's max function order duplicates?
I've been looking at the max method in Ruby's Enumerable mixin (v2.4.1).
It's a fairly straightforward method, but how it orders items when duplicates are present is a bit confusing.
For example:
x = [1,2,3,4,5,6,7,8,9]
x.max {|a, b| a%2 <=> b%2}
=>…
River
- 8,585
- 14
- 54
- 67
7
votes
0 answers
NoMethodError: undefined method "delete_prefix" String class (Ruby 2.4.1)
I'm using the latest Ruby (version 2.4.1)
I see there's a method String#delete_prefix as defined in
https://ruby-doc.org/core-2.4.1/String.html#method-i-delete_prefix
But in irb, this method doesn't exist for some reason:
2.4.1 :030 >…
Zack Xu
- 11,505
- 9
- 70
- 78
6
votes
1 answer
Uncaught TypeError: $(...).modal is not a function in rails 6
Getting this error in rails 6, in rails 5 it was a easy fix after updating the application to rails 6, including webpack this error is appear every where I try to close the model inside the js.erb files.
My files:…
vidur punj
- 5,019
- 4
- 46
- 65
5
votes
1 answer
How can I remove non-printable invisible characters from string?
How can I remove non-printable invisible characters from string?
Ruby version: 2.4.1
2.4.1 :209 > product.name.gsub(/[^[:print:]]/,'.')
=> "Kanha"
2.4.1 :210 > product.name.gsub(/[^[:print:]]/,'.').length
=> 6
2.4.1 :212 >…
Surya
- 2,429
- 1
- 21
- 42
5
votes
1 answer
How to get size of cloned lazy enumerator
We have an Enumerator::Lazy object
a = [1,2,3].lazy.map {} #=> :map>
a.size #=> 3
a.clone.size #=> nil
Does anyone have correct explanation of such behaviour ? I know that size returns size of the…
Alex Frolov
- 73
- 6
5
votes
1 answer
LoadError: incompatible library version: bindex/cruby
Ruby v2.4.1 - Rails v5.0.6
After running rake db:migrate, this is the error I'm getting:
LoadError: incompatible library version
.. /.rvm/gems/ruby-2.4.1/gems/bindex-0.5.0/lib/bindex/cruby.bundle
Thanks in advance if you can help!
nope2023
- 1,668
- 1
- 15
- 28
4
votes
1 answer
best way to organize a long piece of code in ruby refinement block
module Access
def last
self[-1]
end
def start_end
self[0] + last
end
end
module StringExt
refine String do
include Access
end
end
using StringExt
puts 'abcd'.last # => d
puts 'abcd'.start_end
When a class being…
Gaoyong Pan
- 93
- 4
3
votes
0 answers
Getting "ruby-2.4.2/lib/ruby/2.4.0/forwardable.rb:157 forwarding to private method" while running rspec
I have upgraded my application from Ruby 2.2.3 to Ruby 2.4.2, Rails version is 5.1.4. I am able to upgrade the application but when I run 'bundle exec rspec' getting too many lines similar to
..... "ruby-2.4.2/lib/ruby/2.4.0/forwardable.rb:157…
Ritesh Kumar
- 2,183
- 2
- 20
- 32
3
votes
2 answers
Why update_attributes doesn't update an attribute, but update does?
Rails version:
Rails 5.1.1
Ruby Version:
ruby-2.4.0 [ x86_64 ]
Local Server:
Puma starting in single mode...
* Version 3.9.1 (ruby 2.4.0-p0), codename: Private Caller
* Min threads: 5, max threads: 5
* Environment: development
* Listening on…
praaveen V R
- 1,259
- 1
- 11
- 20
3
votes
1 answer
How do I scan every element of an array except one index?
I'm using Ruby 2.4. How do I scan every element of an array for a condition except one index in the array? I tried this
arr.except(2).any? {|str| str.eql?("b")}
But got the following error:
NoMethodError: undefined method `except' for ["a", "b",…
Dave
- 15,639
- 133
- 442
- 830
3
votes
1 answer
Dynamically include associations for objects in Rails
I am currently developing a small Rails 5 application where I need to pass on an ActiveRecord object to an external service based on certain events. In my model I have defined the following:
# /models/user.rb
after_create…
Severin
- 8,508
- 14
- 68
- 117