24 Apr
2006
24 Apr
'06
12:51 p.m.
Hey All,
When taking integer arguments in an abstraction, it's nice sometimes to set a default if the argument is not set. For this you can do something like:
[$1] | [select 0] | / [45( / | / [f ]
Or maybe something even simpler.
I would like to do something similar for symbolic arguments. I.e. if an argument is supplied, use it, otherwise use some default or take some other action. Unfortunately there seems to be no way to detect an 'empty' symbol. Has anyone got any ideas?
Best rgds,
Chris.
chris@mccormick.cx http://mccormick.cx