Syntax
squares = [1, 2, 3].map { |n| n * n }Examples
Ruby map example
A focused example you can adapt while practising.
squares = [1, 2, 3].map { |n| n * n }Best practices
- Start with the smallest working example, then adapt it to your project.
- Use the language’s standard library and idioms before introducing extra dependencies.
Runtime & versions
Ruby interpreter. Feature availability depends on the language and runtime version used by your project; consult the official reference below.
Ruby documentation