[REBOL] Looking for advice
From: patrick::philipot::laposte::net at: 18-Jan-2003 18:39
Hi List,
I am faced to a problem for which I cannot found a simple answer, or better
said for which any solution I came with seemed "montruously" difficult.
I am looking for advice.
Here is my problem.
I have to evaluate a block like this one [6 + 5 * 4 / 2 + 1].
It is quite simple when the block is well formed [digit operator digit
operator ...].
However my block is generated at random whith misplaced items and none
values, that have to be discarded like that :
[3 none 1 + 9 4 + 1 -] -> [3 + 9 + 1]
[0 4 0 + 0 none none 2 /] -> [0 + 0]
[none / 8 1 7 none 0 * 5] -> [8]
[7 1 9 3 4 9 none - none] -> [7]
[2 3 - 7 + none 0 / none] -> [2 - 7 + 0]
I thought 'parse could be used somewhere, but I am not able to figure out
how.
Regards
Patrick
