In einer eMail vom 23.03.00 23:25:19 (MEZ) Mitteleuropäische Zeit schreibt [EMAIL PROTECTED]: > Hi Volker, > > you wrote: > >use and /local have another bug: you can't look in after an error! > > I'm not sure how you were trying to "look in": > > >> f: func [/local a] [a: 1 1 / 0] > > will cause a divide by zero error: > > >> f > ** Math Error: Attempt to divide by zero. > ** Where: 1 / 0 > > Now let's look at the value of a: > > >> first second :f > == a: > > >> get first second :f > == 1 > > "Looked in" and saw that a evaluates to 1. You must mean something quite > different? > No. I meant that. Just have not known this way. thanks. > >a question: [a: do [print "1"]] does not work, how can i handle this too? > >i wanted to return the result of [do b] this way, with some lines after it > >[.. e: do b if a-option [..] "return" e ] ? > > print returns nothing, and nothing is a value of type unset!: > >> type? print "hello" > hello > == unset! > > >> type? do [print "hello"] > hello > == unset! > > >> print mold do [print "hello"] > hello > ** Script Error: mold is missing its value argument. > ** Where: print mold do [print "hello"] > > When type? returns the datatype unset! it is reporting that there was no > value: > > >> type? > == unset! > > There is no value to assign to 'a in your example. Otherwise it works as > you expect (?): > >> f: func [] [a: do [1 + 1] return a] > >> f > == 2 > My problem is: i dont know the arg of 'do. its a parameter. type? destroys the result. i can not store it before, because this can cause an error. i can not [try [a: do b] because the error can be caused by code in 'b . maybe something like [try [ a: try [b]], but this gets complicated. hm. someone more clever than me? > >"code" > >local: func[a "vars" b "script" /local c d ][ > > c: copy[] foreach i a[ append c to set-word! i] append c none > > You could simplify your foreach loop: > > foreach i a [ > append c compose [(to set-word! i) none] > ] > Ah! > > Volker
