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字符串插值

Created: November-22, 2018

双引号分隔符 " 和%Q 序列支持使用 #{ruby_expression} 进行字符串插值：

puts "Now is #{Time.now}"
# Now is Now is 2016-07-21 12:47:45 +0200

puts %Q(Now is #{Time.now})
# Now is Now is 2016-07-21 12:47:45 +0200