Convert string with comma to integer

问题:

Is there any neat method to convert "1,112" to integer 1112, instead of 1?

I've got one, but not neat:

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

回答1:

How about this?

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

回答2:

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.

回答3:

Some more convenient

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

it makes "1 200 200" work properly aswell

回答4:

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

回答5:

I would do using String#tr :

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

回答6:

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