Ruby: Create string using values from subarrays

Question

I have multidimensional array and I'm trying to create a string that accesses the values of each subarray based on position. For example:

appointments = [["get lunch", "3pm", "fancy clothes"], ["walk the dog", "1pm", "sweat pants"]]

I want to use this information to create a single string by iterating over each subarray and outputting the values in the following format:

"You have an appointment to #{subarray[0]} at #{subarray[1]}.
Make sure you wear #{subarray[2]}."

Therefore, the final output would be something like:

"You have an appointment to get lunch at 3pm.
Make sure you wear fancy clothes.

You have an appointment to walk the dog at 1pm.
Make sure you wear sweat pants."

Any suggestions on how can I accomplish this?

tadman · Accepted Answer · 2014-05-27 16:03:31Z

4

Pretty simple given your format:

appointments = [["get lunch", "3pm", "fancy clothes"], ["walk the dog", "1pm", "sweat pants"]]

appointments.collect do |subarray|
  "You have an appointment to #{subarray[0]} at #{subarray[1]}.\nMake sure you wear #{subarray[2]}.\n"
end.join("\n")

This is even easier if you take advantage of the natural ordering:

appointments.collect do |subarray|
  "You have an appointment to %s at %s.\nMake sure you wear %s.\n" % subarray
end.join("\n")

answered May 27, 2014 at 16:03

tadman

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Comments

Uri Agassi · Accepted Answer · 2014-05-27 16:03:09Z

3

appointments.map do |subarray|
  "You have an appointment to #{subarray[0]} at #{subarray[1]}.\nMake sure you wear #{subarray[2]}."
end.join("\n\n")
# => "You have an appointment to get lunch at 3pm.\nMake sure you wear fancy clothes.\n\nYou have an appointment to walk the dog at 1pm.\nMake sure you wear sweat pants."

You could also make your variables named:

appointments.map do |appointment, time, clothing|
  "You have an appointment to #{appointment} at #{time}.\nMake sure you wear #{clothing}."
end.join("\n\n")

answered May 27, 2014 at 16:03

Uri Agassi

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