Support other decimal point symbols

[bbrdaric]

Regex to support comma "," and raised period "·" as decimal point symbols for TYPE_NUMERIC.

http://mathworld.wolfram.com/DecimalPoint.html
https://en.wikipedia.org/wiki/Decimal#Decimal_fractions

This is very important when reading HTML and writing to Excel.

[MarkBaker]

I'm not sure that this should be included in the default value binder, or if it should be in the advanced value binder, or even in a new custom value binder; but certainly you should be using the advanced value binder or a custom binder if you're working with the HTML reader (if only for handling dates)

[bbrdaric]

Yes, this whole regex could all go to advanced value binder.

I see there are comma separated format number constants in NumberFormat.php, but these are not used anywhere.

NumberFormat.php

const FORMAT_NUMBER_COMMA_SEPARATED1    = '#,##0.00';
const FORMAT_NUMBER_COMMA_SEPARATED2    = '#,##0.00_-';

On the other hand, these are all valid numeric types

• 5
• .5
• 5.5
• ,5
• 5,5
• ·5
• 5·5

I am just not sure if Excel supports raised dot symbol "·".

It just depends on Excel (Windows) Region and Language settings (Number format) so for reading HTML it may be good to support some Localization parameter / setting like element lang attribute.