CODEWITHSUNDEEP
ruby-on-railsruby
Brian Armstrong
Brian Armstrong

Reputation: 19863

Ruby: call list of methods until one returns true

Is there a pretty way to make a series of method calls in ruby UNTIL one returns true?

This was my first thought, but was thinking there might be a nicer way:

if method_one
elsif method_two
elsif method_three
else
  puts "none worked"
end

Upvotes: 3

Views: 778

Answers (3)

Farrel
Farrel

Reputation: 2381

You can use Enumerable#any? as well.

[ :m1, :m2, :m3 ].any?{ |method| object.send( method )} || "None Worked"

Upvotes: 6

Harish Shetty
Harish Shetty

Reputation: 64363

Try this:

[:m1, :m2, :m3, ...].find{ |m| send(m) } != nil || "none worked"

Returns true if one of the methods returns true otherwise returns none worked.

Upvotes: 4

Dmytrii Nagirniak
Dmytrii Nagirniak

Reputation: 24108

There are number of Ruby-ish options. One interesting is:

method_one || method_two || method_three || Proc.new { puts "none worked" }.call

or

method_one || method_two || method_three || lambda { puts "none worked" }.call

Upvotes: 5

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