ruby Archives - Page 11 of 19

Checking if a variable is not nil and not zero in ruby

I am using the following code to check if a variable is not nil and not zero if(discount != nil && discount != ...

May 16, 2022
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How to install PostgreSQL’s pg gem on Ubuntu?

I’m trying to install PostgreSQL’s pg gem for Ruby. I issued the following command: gem install pg I installed Ruby 1.9.2 using RVM. ...

May 16, 2022
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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. rake spec ...

May 15, 2022
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Best practices with STDIN in Ruby? [closed]

Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be ...

May 15, 2022
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How do I use the conditional operator (? :) in Ruby?

How is the conditional operator (? :) used in Ruby? For example, is this correct? <% question = question.size > 20 ? question.question.slice(0, ...

May 15, 2022
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How to sort an array in descending order in Ruby

I have an array of hashes:...

May 15, 2022
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How do I remove blank elements from an array?

I have the following array cities =...

May 15, 2022
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What is the difference between require_relative and require in Ruby?

What is the difference between require_relative and require in Ruby? 8 Answers 8

May 15, 2022
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How to avoid “cannot load such file — utils/popen” from homebrew on OSX

I’m getting an error when I run brew in the terminal: /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- utils/popen (LoadError) from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require' ...

May 14, 2022
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Replace words in a string – Ruby

I have a string in Ruby: sentence = "My name is Robert" How can I replace any one word in this sentence easily ...

May 14, 2022
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