Recent questions tagged ruby

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ruby - What is recursion and how does it work?

Could someone please explain what exactly recursion is (and how it works in Ruby, if that's not too much to ... it's not entirely relevant). 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 on rails - FactoryGirl build_stubbed strategy with a has_many association

Given a standard has_many relationship between two objects. For a simple example, let's go with: class Order ... collection is also stubbed? See Question&Answers more detail:os...

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

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503 views

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ruby - Rails Select Drop Down for States?

I was wondering if maybe there was some already built in function for rails so that it would create a select ... manually enter all the states? See Question&Answers more detail:os...

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

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502 views

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ruby on rails - Multiple foreign keys referencing the same table in RoR

I want a Customer to reference two Address models, one for the billing address and one for the shipping ... other attributes not shown 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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513 views

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ruby - Directly accessing an instance variable vs. Using an accessor method

Can anyone explain the difference between accessing an instance attribute via self.attribute and by @attribute? See Question&Answers more detail:os...

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

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460 views

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ruby - How to create an exit message

Is there a one line function call that quits the program and displays a message? I know in Perl it's as ... : puts "Message goes here" exit See Question&Answers more detail:os...

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

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560 views

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ruby - Connect to a locally built Jekyll Server using mobile devices in the LAN

After using jekyll serve on one machine, a WEBrick server is set up and the site can be accessed from localhost ... pushing the code to Github. See Question&Answers more detail:os...

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

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679 views

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ruby - Best way to pretty print a hash

I have a large hash with nested arrays and hashes. I would like to simply print it out so it ' ... be formatted cleanly. 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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603 views

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ruby on rails - Adding a custom seed file

I want to populate a new feature with dummy data, but don't want to use the db/seeds.rb file as it already ... like to run (only) that file? See Question&Answers more detail:os...

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

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438 views

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ruby - Determining if a variable is within range?

I need to write a loop that does something like: if i (1..10) do thing 1 elsif i (11..20) do thing ... down the wrong paths in terms of syntax. See Question&Answers more detail:os...

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

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424 views

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ruby - Array include any value from another array?

What's the most efficient way to test if an array contains any element from a second array? Two examples below, ... - foods).size < cheeses.size See Question&Answers more detail:os...

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

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1.1k views

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ruby on rails - Skip callbacks on Factory Girl and Rspec

I'm testing a model with an after create callback that I'd like to run only on some occasions while testing. ... do # run callback 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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544 views

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ruby - How to change Hash values?

I'd like to replace each value in a hash with value.some_method. For example, for given a simple hash: {"a" => ... new_hash = hash.magic{ ... } See Question&Answers more detail:os...

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

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475 views

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ruby - Is it ok to use `any?` to check if an array is not empty?

Is it bad to check if an array is not empty by using any? method? a = [1,2,3] a.any? => true a.clear ... is it better to use unless a.empty? ? See Question&Answers more detail:os...

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

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522 views

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ruby on rails - How to run a .rb file from IRB?

I am starting out with Ruby on Rails. I am currently going through a tutorial where it says that I have to run ... at all. I am running Leopard. See Question&Answers more detail:os...

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

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549 views

1 answer

ruby on rails - Where do gems install?

I'm trying to edit one of the gem's config files and I can't find it. I'm not sure how I did this in the past. See Question&Answers more detail:os...

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

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762 views

1 answer

ruby on rails - How to get last N records with activerecord?

With :limit in query, I will get first N records. What is the easiest way to get last N records? See Question&Answers more detail:os...

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

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748 views

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ruby on rails - How to use ActiveAdmin on models using has_many through association?

I am using ActiveAdmin gem in my project. I have 2 models using has_many through association. The database schema looks ... page? Thanks all. :) See Question&Answers more detail:os...

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

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484 views

1 answer

ruby - Removing a model in rails (reverse of "rails g model Title...")

rails g model Rating user_id:integer message:string value:integer How can I completely remove this model? Thanks See Question&Answers more detail:os...

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

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391 views

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ruby on rails - HTTP authentication between devise and iphone app

I'm new to ruby on rails but I want to send the data from my SQlite database from my iphone app to the rails ... of how all this works. Thanks! See Question&Answers more detail:os...

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

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523 views

1 answer

ruby on rails - Redis and Memcache or just Redis?

I'm using memcached for some caching in my Rails 3 app through the simple Rails.cache interface and now ... anything definitive either way. See Question&Answers more detail:os...

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

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521 views

1 answer

ruby on rails - Can't access site on EC2 instance via public ip

I've been experimenting with EC2 for a couple days and have been banging my head against simply even being ... 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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503 views

1 answer

ruby on rails - Rubygems, Bundler and RVM confusion

I read "Relationships between Rubygems, Bundler, and RVM" before asking it again. Well, there are many questions ... by your detailed answers. See Question&Answers more detail:os...

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

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491 views

1 answer

ruby - Is it possible to run a single test in MiniTest?

I can run all tests in a single file with: rake test TEST=path/to/test_file.rb However, if I want to run ... rspec path/to/test_file.rb -l 25 See Question&Answers more detail:os...

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

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463 views

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ruby on rails - delayed_jobs vs resque vs beanstalkd?

Here is my needs: Enqueue_in(10.hours, ... ) (DJ syntax is perfect.) Multiply workers, concurrently. (Resque ... that you should check it out. See Question&Answers more detail:os...

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

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476 views

1 answer

ruby - How to know if today's date is in a date range?

I have an event with start_time and end_time and want to check if the event is "in progress". That would be to ... you do this in a function? See Question&Answers more detail:os...

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

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438 views

1 answer

ruby - What's the difference between RSpec's subject and let? When should they be used or not?

http://betterspecs.org/#subject has some info about subject and let. However, I am still unclear on the difference ... go? I am so confused. See Question&Answers more detail:os...

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

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494 views

1 answer

ruby - RVM is not working in ZSH

I'd like to try out the ZSH shell on my Mac, but I also do a lot of Ruby and Rails development, so I ... s website, but nothing helped me there. See Question&Answers more detail:os...

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

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