Recent questions tagged RUBY

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ruby - RVM: Uninstalling all gems of a gemset

I have global gems and various gemsets. I want to remove all gems of a gemset. Is there a way do to this, besides uninstalling the gemset? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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626 views

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ruby - How do you pass arguments to define_method?

I would like to pass an argument(s) to a method being defined using define_method, how would I do that? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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421 views

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ruby - When to use nested classes and classes nested in modules?

I'm pretty familiar with when to use subclasses and modules, but more recently I've been seeing nested ... those techniques would be used? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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459 views

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ruby - How do I dump an object's fields to the console?

When I'm running a simple Ruby script, what's the easiest way to dump an object's fields to the console? I ... will work with arrays as well. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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615 views

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ruby - rails - Redirecting console output to a file

On a bash console, if I do this: cd mydir ls -l > mydir.txt The > operator captures the standard input and ... a better option, I'm all ears. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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647 views

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ruby - RVM is not a function, selecting rubies with 'rvm use ...' will not work

List the ruby versions console:~$ rvm list rvm rubies ruby-2.0.0-p481 [ i686 ] # => - current # ... /integration/gnome-terminal/ for a example. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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652 views

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ruby - Rspec: "array.should == another_array" but without concern for order

I often want to compare arrays and make sure that they contain the same elements, in any order. Is there a ... elements don't implement #<=> See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ruby - What exactly is Arel in Rails 3.0?

I understand that it is a replacement for ActiveRecord and that it uses objects instead of queries. But... ... to use with stored procedures? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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861 views

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ruby - How to test if parameters exist in rails

I'm using an IF statement in Ruby on Rails to try and test if request parameters are set. Regardless of whether or ... ... do something ... end See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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653 views

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ruby - How do I run only specific tests in Rspec?

I think there's a way to run only tests with a given label. Anybody know? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

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ruby on rails - i18n Pluralization

I want to be able to translate pluralized strings in i18n in rails. A string can be : You have 2 kids or You have ... view. How can I do that ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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685 views

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ruby on rails - Pushing app to heroku problem

I am trying to push my app to heroku and I get the following message: $ heroku create Creating electric-meadow- ... a new one? Any suggestions? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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636 views

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ruby - How do you run a single test/spec file in RSpec?

I want to be able to run a single spec file's tests — for the one file I'm editing, for example ... /spec/spec_helper.rb ./spec/db_spec.rb See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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664 views

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ruby - How to drop columns using Rails migration

What's the syntax for dropping a database table column through a Rails migration? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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515 views

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ruby on rails - Why can't show restaurant list?

I'm trying to make some restaurant list. I associated two tables, and then write this code. class Restaurant ... problem? Thanks in advance. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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371 views

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ruby on rails - I need help properly forming this ActiveRecord association

Basically, a User can participate in one or more events as either (or potentially both) a vendor and as a member ... 2014-08-30 15:02:04.70209 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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426 views

1 answer

ruby on rails - Escape non HTML tags in plain text (convert plain text to HTML)

Using Rails, I need to get a plain text and show it as HTML, but I don't want to use <pre> tag, as it changes the format. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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740 views

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ruby on rails - Passenger says Bundler:GemNotFound error while the bundle install says it's there

i get Passenger error on shared hosting Could not find i18n-0.6.0 in any of the sources (Bundler::GemNotFound) ... hosting? how do i solve it? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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436 views

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ruby - Arrays misbehaving

Here's the code: # a = Array.new(3, Array.new(3)) a = [[nil,nil,nil],[nil,nil,nil]] a[0][0] = 1 a.each ... , nil] [1, nil, nil] So why is that? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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404 views

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ruby on rails - What is a version control system? How is Git useful?

like for example i am doing ruby on rails and using git for version control. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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516 views

1 answer

ruby on rails - Inserting an array using Sequel gem in PostgreSQL

i created a table with the following schema in code DB.create_table :Pokemon do primary_key :id String :first_name ... Text array in a column See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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418 views

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ruby - What does #{...} mean?

Such as in the following code from Why's Poignant Guide: def wipe_mutterings_from( sentence ) unless sentence.respond_to? ... ' if close end end See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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390 views

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ruby - rspec --init not working/ `mkd ir': Invalid argument - ./C: (Errno::EINVAL)

I'm following codeschool's class on rspec. Installing worked fine. I made a file called rspec-zombie for the project. ... /rspec:23:in `<main>' See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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351 views

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ruby - How to declare Hash.new(0) with 0 default value for counting objects in JavaScript?

I'm trying to iterate through an array of digits and count how many times each digit is found in the array. ... Hash as an Object in JavaScript? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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512 views

1 answer

ruby on rails - PDFkit hangs when generating a pdf with an image

I want to render a webpage as a PDF. It uses a single image, and I've read that you need to supply the absolute ... ' bin/rails:4:in `<main>' See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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528 views

1 answer

ruby - How does negative index work with `Array#[]=`?

I tried to see how Array#[]= works, and played around: enum[int] = obj → obj enum[start, length] = obj → obj enum[range] ... = [3,4] #=> [3, 4] See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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589 views

1 answer

ruby - Rails query string with a period (or full stop).

I am currently trying to get a handle on RoR. I am passing in two strings into my controller. One is ... guidance would be greatly appreciated. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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461 views

1 answer

ruby - Why won't a longer token in an alternation be matched?

I am using ruby 2.1, but the same thing can be replicated on rubular site. If this is my string: 儘管中國婦幼衛生 ... is foo. That makes sense to me. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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