How to use an array to solve the following...

[Richard Gaskin]

Bob Sneidar wrote:

 > Repeat for each line x in the keys of array y would seem at a glance
 > to have to reevaluate the keys of <array> each time through the loop,
 > wouldn't it? You must mean you get the keys first in a variable and
 > then use that.

If I understand how the engine treats that, it seems that it gets the 
keys only once up front, since anything used with "repeat for each" is 
considered unchangeable during the repeat.

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  Richard Gaskin
  Fourth World
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