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array sorting and iterating
Collections (Arrays and Hashes) in Ruby example from a Well House Consultants training course
More on Collections (Arrays and Hashes) in Ruby [link]
Source code: lunch Module: R107
# Set up an array of what the delegates had for lunch food = ["Sandwich","Toasted Sandwich","Salad", "Panini and Chocolate Brownie","Curry","Sushi","Sandwich"] # How long is my Ruby array? puts food.length # Sort the array (using the given code to tell whcih record # goes before which other record - in this case sort by the # length of the string), then reverse the result food = food.sort { |a,b| b.length <=> a.length } .reverse # Two ways of outputting the (now sorted) array # This way is slightly more longer winded but works well if # you need to be able to refer to the number in the array for k in 0...food.length do p food[k] end # Quick and easy ... but you can't easily refer to next or previous for yum in food do p yum end __END__ Here is how it runs! 92:d2 grahamellis$ ruby lunch 7 "Salad" "Curry" "Sushi" "Sandwich" "Sandwich" "Toasted Sandwich" "Panini and Chocolate Brownie" "Salad" "Curry" "Sushi" "Sandwich" "Sandwich" "Toasted Sandwich" "Panini and Chocolate Brownie" 92:d2 grahamellis$ Learn about this subject
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