我有一个带有不同货币数量的字符串,例如,
"454,54$", "Rs566.33", "discount 88,0$" etc.
模式不一致,我只想从字符串和货币中提取浮点数。
我如何在 Ruby 中实现这一点?
你可以试试这个:
["454,54$", "Rs566.33", "discount 88,0$", "some string"].each do |str|
# making sure the string actually contains some float
next unless float_match = str.scan(/(\d+[.,]\d+)/).flatten.first
# converting matched string to float
float = float_match.tr(',', '.').to_f
puts "#{str} => %.2f" % float
end
# => 454,54$ => 454.54
# => Rs566.33 => 566.33
# => discount 88,0$ => 88.00