Enumerable Blocks

Enumerable methods combine blocks with collection traversal.

enumerable_blocks.rb

scores = [2, 5, 8]
threshold = 

boosted = scores.map do |score|
  score + 1
end

passing = boosted.select do |score|
  score >= threshold
end

puts "boosted=#{boosted.join(",")}"
puts "threshold=#{threshold}"
puts "passing=#{passing.join(",")}"

scores = [2, 5, 8]
threshold = 

boosted = scores.map do |score|
  score + 1
end

passing = boosted.select do |score|
  score >= threshold
end

puts "boosted=#{boosted.join(",")}"
puts "threshold=#{threshold}"
puts "passing=#{passing.join(",")}"

scores = [2, 5, 8]
threshold = 

boosted = scores.map do |score|
  score + 1
end

passing = boosted.select do |score|
  score >= threshold
end

puts "boosted=#{boosted.join(",")}"
puts "threshold=#{threshold}"
puts "passing=#{passing.join(",")}"

enumerable block Methods such as `map` and `select` use block return values to build new collections.