Mark-
Thanks so much for adding insight to this discussion. You raise some
very interesting points here.
And I realize the parser is the problem here, so I'd only add that
function addOneToIndex
add 1 to sIndex
return sIndex
end function
would be an error in functional programming, since the whatShouldThisDo?
and addOneToIndex functions have an unfortunate and easily-fixed side effect.
variable sIndex
-- no side effects here any more
command setSIndexTo pNewIndex
put pNewIndex into sIndex
end setSIndexTo
-- this is now no longer ambiguous
command whatShouldThisDo? sInput
-- this will work with line sIndex
add char sIndex of line sIndex of sInput to tSum
setSIndexTo sIndex+1
-- this will work with line sIndex + 1
setSIndexTo sIndex+1
add char sIndex of line sIndex of sInput to tSum
end command
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