solution.rb

#!/usr/bin/env ruby

require 'pp'
require 'open-uri'
require 'json'

input = "61.210841,-149.888735\nSan Francisco\n33132"
places = input.split(/\n/)
results = {}

def is_coordinate?(string)
  string.include?(',') && string !~ /[a-zA-Z]/
end

def fetch_data_for(place)
  json = ''
  if is_coordinate?(place)
    lat, lon = place.split(/,/)
    url = "https://api.openweathermap.org/data/2.5/weather?lat=#{lat}&lon=#{lon}&appid=d7457467f2492af08b5aa255be8b2e2e" 
    json = open(url) {|f| f.read }
  else
    url = "https://api.openweathermap.org/data/2.5/weather?q=#{place}&appid=d7457467f2492af08b5aa255be8b2e2e"
    json = open(url) {|f| f.read }
  end
  return JSON.parse(json)
end

places.each do |place|
  parsed_json = fetch_data_for(place)
  temp = parsed_json["main"]["temp"]
  name = parsed_json["name"]
  results[name] = temp
end

max = results.values.max
puts "highest temp is in: #{results.key(max)}"