On Mon, Apr 08, 2002 at 07:56:11PM +0100, Piers Cawley wrote: > > Also, just wondering: > > > > $_[_][EMAIL PROTECTED] _=_0_-_ > > > > does that work the way I expect it to? > > Dunno, what do you expect it to do?. To my way of thinking there's > going to be a syntax error at the third '_'. But I'm not entirely > certain of that. To me, the third '_' seems like it'd be an unambiguous case of the concatenation operator. I still can't parse it, however; it looks like an attempt to modify a non-lvalue:
$_.[_()] _ @_._() _= _0_() - _() That is: 1. Invoke the subroutine _ (name resolved in current scope) 2. Dereference the variable $_, yielding an array reference. 3. Retrieve the element of the referenced array whose index is the result of step 1. 4. Invoke the method _ on the array @_. 5. Concatenate the results of steps 3 and 4 6. Invoke the subroutine _0_ 7. Invoke the _ again (or retrieve the cached result from step 1) 8. Subtract #7 from #6 9. Append the result of step 8 to contents of the lvalue which is the result of step 5. This is where my interpretation fails because the result of step 5 is not an lvalue. Then again, it's probably using some syntax that I haven't internalized yet. -- Mark J. REED <[EMAIL PROTECTED]>