37 lines
593 B
Markdown
37 lines
593 B
Markdown
---
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title: Ruby 2.1
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category: Ruby
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tags: [Archived]
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intro: |
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Quick reference to the [new features in Ruby 2.1](https://www.ruby-lang.org/).
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---
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### Named arguments with defaults
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```ruby
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# length is required
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def pad(num, length:, char: "0")
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num.to_s.rjust(length, char)
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end
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```
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```ruby
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pad(42, length: 6) #=> "000042"
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pad(42) #=> #<ArgumentError: missing keyword: length>
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```
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### Module.prepend
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```ruby
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prepend(
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Module.new do
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define_method ...
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end
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)
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```
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### References
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- http://globaldev.co.uk/2013/03/ruby-2-0-0-in-detail
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- http://globaldev.co.uk/2014/05/ruby-2-1-in-detail
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