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Feature #12047
closed
Set#=== (aliased to include?)
Feature #12047: Set#=== (aliased to include?)
Status:
Closed
Assignee:
-
Target version:
-
Description
Add Set#=== as an alias for Set#include? so that sets may be used in case statements:
require 'set' GOOD_COMMANDS = Set[ :foo, :bar, :jim ] BAD_COMMANDS = Set[ :baz, :bax, :jam ] ODD_COMMANDS = Set[ :quux, :xyzzy ] case my_command when GOOD_COMMANDS then puts "Yay!" when BAD_COMMANDS then puts "Boo!" when ODD_COMMANDS then puts "Whaa?" end 
Updated by Phrogz (Gavin Kistner) almost 10 years ago
- Subject changed from Set#=== to Set#=== (aliased to include?)
Updated by sawa (Tsuyoshi Sawada) almost 10 years ago
I think that is ad hoc. Splat could be used, just like with arrays.
case my_command when *GOOD_COMMANDS then puts "Yay!" when *BAD_COMMANDS then puts "Boo!" when *ODD_COMMANDS then puts "Whaa?" end And one-time splatting would be also more efficient than calling include? each time.
Updated by jonathanhefner (Jonathan Hefner) almost 6 years ago
This was added in Ruby 2.5, so I think this issue can be closed.
Updated by jeremyevans0 (Jeremy Evans) almost 6 years ago
- Status changed from Open to Closed
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