On Thu, Sep 8, 2011 at 12:47 PM, Steven Taylor <[email protected]> wrote:
> say I've got a verb train, that I like as a verb train... and I don't want
> to break it up. Is there a way to check for an error condition?
>
> 3 (]{~ [ I.~]) i. 4
> 3
>
> 4 (]{~ [ I.~]) i. 4
> |index error
> | 4 (]{~[I.~])i.4
> |[-0]
>
> I could set an initial value like this...
>
> fail=.0 [ret=. 4 { i.4 [ fail=.1
>
> i.e. fail should equal zero if ret=.4 runs correctly.
train=: ]{~ [ I.~]
iFailed=: do bind 'fail=:1'
fail=: 0
3 train ::iFailed i.4
3
fail
0
4 train ::iFailed i.4
1
fail
1
FYI,
--
Raul
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