Thank you for the suggestions and discussion . Regards. Maurizio. 2011/12/6 Mark Engelberg <[email protected]>
> Check out Algorithm T in chapter 7.2.1.3 of Knuth, volume 4A part 1. > Put your items into a vector, and use Algorithm T to generate the > indices of the elements to extract. > _________________________________________________ > For list-related administrative tasks: > http://lists.racket-lang.org/listinfo/users >
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