Given the REBOL source file below (named "describe.r") ...
REBOL []
types: [block? block! number? number! decimal? decimal!]
listtypes: func [
][
foreach [qry typ] types [
print qry
print typ
print "?"
]
]
checktypes: func [
arg
][
foreach [qry typ] types [
b: reduce [q arg]
print mold b
]
]
... I can do the following in the REBOL shell ...
>> do %describe.r
>> listtypes
block?
block!
?
number?
number!
?
decimal?
decimal!
?
>> checktypes 3
... at which point (after pressing 'enter') the REBOL shell drops into
a black hole! Specifically, the window instantly vanishes, as does the
executing interpreter's task. This is happening in version 2.1.2.3.1
running on w95.
soooo...
1) What's happening?
2) How do I do the following: construct a list of function/action
pairs, which can be processed against an argument by applying
each function to the argument, then performing the corresponding
action if the result is 'true?
I know I can write a series of 'if statements, but want to make
this data driven without a wad of redundant code for each case.
Thanks in advance for all words of wisdom!
-jn-
