[Qt-interest] A way to test the number of digits after a decimal point?

[Arnold Krille]

On Tuesday 31 March 2009 18:14:39 Jesús Fernández wrote:
> What about using a QRegExp?
> QRegExp rx("(\\d+)\\.?(\\d*)");
> The second captured string will give you the digits after the decimal point
> if exists.

"after the decimal _point_" Please remember that not all countries use the 
point for decimals. :-)
If the string is already (local aware) validated to be a float number, the 
right thing is to strip all white spaces (yes, there are countries that use 
white space as thousands separator) and look whether there is a character in 
there that is not a digit. If there is one, the strings represents a floating 
point and the count of chars (which would then be digits) after the non-digit 
is the number of digits after the decimal separator.

Maybe that can be done in the above reg-exp but I am not that good at regexp 
to do that on the fly without documentation...

Have fun,

Arnold
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