如何使用正則表達式從標籤之後提取價格？

我的字符串看起來是這樣的：如何使用正則表達式從標籤之後提取價格？

 
Rental DurationPrice60-day$47.8090-day$56.23120-day$60.92

或

 
Rental DurationPrice90-day$47.80180-day$56.23

或

的任意組合：

 
30-day and/or 60-day and/or 90-day and/or 180-day

我想拍攝後面的價格這些時間框架。

來源

2012-02-03 hagope

這個正則表達式捕獲所有nn-day字段後面的價格。

/(?:30|60|180)-day\$(\d+\.\d\d)/

使用它作爲

prices = "Rental DurationPrice60-day$47.8090-day$56.23120-day$60.92" 
prices.scan(/(?:30|60|180)-day\$(\d+\.\d\d)/)

所有的價格獲取到一個數組。

來源

2012-02-03 23:10:01 Borodin

此正則表達式將捕獲所有價格：(?:\d{2,}-day\$(\d+\.\d{2}))

來源

2012-02-03 23:11:40

而不是使用更復雜的正則表達式，我會跟String.scan去，讓它走過的字符串：

'Rental DurationPrice60-day$47.8090-day$56.23120-day$60.92'.scan(/\$[\d.]+/) 
[ 
    [0] "$47.8090", 
    [1] "$56.23120", 
    [2] "$60.92" 
]

如果你不」不想貨幣指標可以後置處理的值，剝離的第一個字符：

'Rental DurationPrice60-day$47.8090-day$56.23120-day$60.92'.scan(/\$[\d.]+/).map{ |s| s[1..-1] } 
[ 
    [0] "47.8090", 
    [1] "56.23120", 
    [2] "60.92" 
]

或者使用一個微小的不同正則表達式與flatten方法：

'Rental DurationPrice60-day$47.8090-day$56.23120-day$60.92'.scan(/\$([\d.]+)/).flatten 
[ 
    [0] "47.8090", 
    [1] "56.23120", 
    [2] "60.92" 
]

來源

2012-02-04 00:59:41

如何使用正則表達式從標籤之後提取價格？

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