FormatRating formats a numeric rating to a string.

FormatText prints pretty text.

IsASIN checks wether str is an ASIN.

IsCartItemID checks wether str is a cart item ID.

IsNumeric checks wether str is numeric.

Rating returns the rating for a asin in a specific locale.

ASINReg matches a ASIN.

CartItemIDReg matches a cart item ID.

NumericReg matches a numeric string.