用逗号将字符串转换为整数

有没有什么简洁的方法可以把“1,112”转换成整数1112，而不是1？

我有一个，不过不够整洁:

"1,112".split(',').join.to_i #=> 1112

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最佳答案

How about this?

 "1,112".delete(',').to_i

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Some more convenient

"1,1200.00".gsub(/[^0-9]/,'')

it makes "1 200 200" work properly aswell

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I would do using String#tr :

"1,112".tr(',','').to_i # => 1112

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You may also want to make sure that your code localizes correctly, or make sure the users are used to the "international" notation. For example, "1,112" actually means different numbers across different countries. In Germany it means the number a little over one, instead of one thousand and something.

Corresponding Wikipedia article is at http://en.wikipedia.org/wiki/Decimal_mark. It seems to be poorly written at this time though. For example as a Chinese I'm not sure where does these description about thousand separator in China come from.

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The following is another method that will work, although as with some of the other methods it will strip decimal places.

a = 1,112
b = a.scan(/\d+/).join().to_i => 1112

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If someone is looking to sub out more than a comma I'm a fan of:

"1,200".chars.grep(/\d/).join.to_i

dunno about performance but, it is more flexible than a gsub, ie:

"1-200".chars.grep(/\d/).join.to_i

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String count = count.replace(",", "");