Class: MapDrill

Inherits:
Drill show all
Defined in:
lib/ruby_drills/array/map_drill.rb

Constant Summary

Constants included from Commands

Commands::GAMBLER

Instance Attribute Summary

Attributes inherited from Drill

#hints, #next, #previous

Instance Method Summary collapse

Methods inherited from Drill

#done?, #drills, #expected, #initialize, #non!

Methods included from Commands

#back, #clear, #continue, #fail, #fold, #help, #hint, #quit, #review, #skip, #welcome, #win

Constructor Details

This class inherits a constructor from Drill

Instance Method Details

#reference ⇒ Object 



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# File 'lib/ruby_drills/array/map_drill.rb', line 20

def reference
  "@numbers.map {|x| x / 2}"
end

#setup ⇒ Object 



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# File 'lib/ruby_drills/array/map_drill.rb', line 3

def setup
  @numbers = (0..10).to_a
  @hints = ["You want to divide each member of this collection by two...",
            "http://ruby-doc.org/core-1.9.3/Enumerable.html#method-i-map"]
end

#show ⇒ Object 



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# File 'lib/ruby_drills/array/map_drill.rb', line 9

def show
  puts %{
@numbers = #{@numbers.inspect}

Use the method that returns a new array with the results of
running block once for every element in enum to produce
#{expected}

}
end

#valid?(input) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ruby_drills/array/map_drill.rb', line 24

def valid?(input)
  ['map', 'collect'].any? {|x| input.include? x}
end