ruby snippet: smiplify calling a proc

Posted by peter on January 22, 2007

Here is a little trick (among thousands) I picked up off #rubyonrails:

class Symbol # Turns the symbol into a simple proc, which is especially useful for enumerations. Examples: # # # The same as people.collect { |p| p.name } # people.collect(&:name) # # # The same as people.select { |p| p.manager? }.collect { |p| p.salary } # people.select(&:manager?).collect(&:salary) def to_proc Proc.new { |*args| args.shift.send(self, *args) } end end
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