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Articles tagged with #ruby
Environment MacOS Sonoma 14.3 Original Ruby version: 2.7.8 Ruby Version Manager: RVM 1.29.12 Goal Upgrade Ruby from 2.7.8 to 3.0.6. Issues Description After successfully installing Ruby 3.0.6, I encountered difficulties running bundle install in...
It is common to see require 'something' in a Rails application. But what exactly does require do? What is require used for in Ruby? require is used to load external libraries or modules into your program. For example, Before you require the JSON modu...
Sometimes we will use klass_name.all to get records from the database. That’ll be ok, if we only have 100 records in the database. However, using klass_name.all might not be the best way to get records, especially when we need to query large numbers ...
Note: The following was tested with Ruby 2.6.6 Keyword: Heredoc What is heredoc? Heredoc is used for a form of multiline strings and preserves the line breaks and whitespace (including indentation) in the text. How to define a heredoc in Ruby? stri...
Recently, I had a job to fix the slow code. Before diving into fixing the slow code, I used Scout APM to identify the performance bottlenecks, which helped me make sure where the slow code is. To prove the new optimization solution is faster, in addi...
What's nil? nil is an instance of NilClass. It's a special Ruby object used to represent the absence of any value. And it also behaves like false when used in a conditional statement. What's more, there is only one nil object, whose object_id is alwa...
