Flesxible looping [Was: Making Revolution faster with really big arrays]

[Alex Tweedly]

Frank D. Engel, Jr. wrote:

>
> People working on computer languages generally avoid (and with good 
> reason) adding new keywords.

True in general, but this is Transcript, which already has over 250 
keywords (a fair number of which have changed in or since 2.0), so I 
didn't feel the same need to restrain myself :-)  

But you're right - if it can be done by reusing existing keywords (or 
operators) that would be better.

> Have you considered "and for" rather than "also"?

Yes, I did, but was worried that there would be ambiguities with 
existing usages of 'and' as an operator.
(e.g. repeat while x and y   is valid today)

It's hard to tell when there's no published BNF or formal language 
description; if 'and for' can be parsed unambiguously, it would be better.

-- 
Alex Tweedly       http://www.tweedly.net



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