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Programming puzzles: processing lists!
12-30-2017, 05:49 PM (This post was last modified: 12-30-2017 05:55 PM by StephenG1CMZ.)
Post: #233
RE: Programming puzzles: processing lists!
(12-30-2017 02:39 PM)pier4r Wrote:  Just discovered, thanks to the work of Terje here (I wonder why HP does not release a pdf with the prime help. It would make things way easier, especially for search and bookmarking) that #41 on the prime can be done with the function cumSum.

The more I look into the prime, the more I see a quite extended standard library of commands.

One oddity I just noticed was that cumSum({}) returns 0...
Many built-ins don't handle empty lists well.
But what should the answer be?
{} means you can distinguish input {} from input {0} if desired
{0} treats {} as {0}, just like my ListSigmaSum procedure (whereas the builtin SigmaSum fails).
I am thinking returning {0} would be better, assuming there is no good reason to return 0.

Eddie W Shore has a workaround for some other oddities here:

Stephen Lewkowicz (G1CMZ)
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RE: Programming puzzles: processing lists! - StephenG1CMZ - 12-30-2017 05:49 PM

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