ruby入門_for_in

配列とハッシュ・テーブルの場合
例を見ればよい

people1 = ["Tom", "Marry", "Jack", "Kay"]
people2 = {"Tom"=>23, "Marry"=>22, "Jack"=>25, "Kay"=>20}
# ------------------------
for person in people1
  puts person
end
# ------------------------
for personInfo in people2
  # puts "name #{personInfo[0]} age #{personInfo[1]}"
  puts personInfo[0] + " : " + personInfo[1].to_s
end
# ------------------------
for name, age in people2
  # puts "name #{name} age #{age}"
  puts name + " : " + age.to_s
end

しゅつりょく
Tom Marry Jack Kay Tom : 23 Kay : 20 Jack : 25 Marry : 22 Tom : 23 Kay : 20 Jack : 25 Marry : 22