在 Javascript 中将字符串中带有 $ 的所有价格放入数组中

Question

var string = 'Our Prices are $355.00 and $550, down form $999.00';

如何将这 3 个价格放入数组中？

Answer 1

正则表达式

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string.match(/\\$((?:\\d|\\,)*\\.?\\d+)/g) || []\n

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这|| []是没有匹配的情况：它给出一个空数组而不是null.

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火柴

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• $99
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• $.99
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• $9.99
\n
• $9,999
\n
• $9,999.99
\n

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解释

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/         # Start RegEx\n\\$        # $ (dollar sign)\n(         # Capturing group (this is what you\xe2\x80\x99re looking for)\n  (?:     # Non-capturing group (these numbers or commas aren\xe2\x80\x99t the only thing you\xe2\x80\x99re looking for)\n    \\d    # Number\n    |     # OR\n    \\,    # , (comma)\n  )*      # Repeat any number of times, as many times as possible\n\\.?       # . (dot), repeated at most once, as many times as possible\n\\d+       # Number, repeated at least once, as many times as possible\n)\n/         # End RegEx\ng         # Match all occurances (global)\n

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为了.99更轻松地匹配数字，我将第二个数字设置为强制 ( \\d+)，同时将第一个数字（连同逗号）设置为可选 ( \\d*)。这意味着，从技术上讲，像这样的字符串与第二个数字（可选小数点之后）$999匹配，这对于结果\xe2\x80\x99并不重要\xe2\x80\x8a\xe2\x80\x94\xe2\x80\ x8ait\xe2\x80\x99s 只是一个技术细节。

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