id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
9784	md5 hashcode in mapcss	Klumbumbus	team	"Is there a possibility to implement a function in mapcss which generates a md5 hashcode of a string?


Why I need such a or a similar function:
You may know the mappaint style Coloured Streets. Streets, buildings and address nodes with the same street name are highlighted in the same colour. (See example on [[Styles/Coloured_Streets]]). It is one of the most useful mappaint styles for JOSM in my opinion.
Currently it works this way: it uses the first character of the value of the ""addr:street"" key (resp. ""name"" for highways) to evaluate the colour. This has some disadvantages.

With a hashcode function this mappaint style could get a huge improvement. By using the first and/or last number of the hashcode of the street name instead of the street name itself, the following improvements result:

- different streets with the same first letter, which are near to each other are displayed in different colours
- typos in ""name"" and ""addr:street"" are displayed
- it works worldwide, also in countries, where a lot of streets start and end with the same letter (france, russia,...)
- it works for all unicode characters and not every single unicode character needs to added manually to the mappaint style code


If there is already a possibility to generate something like a hashcode of a (unicode) string, please tell me, otherwise could you please implement such a function?"	enhancement	closed	normal	14.03	Core mappaint		fixed	mapcss