How can I multiply all elements of a list together with user-defined multiplicatoin? [closed]

Question

so currently I have my own definition of multiplication between elements but it can only multiply two elements.

MyMult[a_,b_]:=...

I want to multiply all elements in a list together with it i.e.

L = {a,b,c,d}
Ans = MyMult[MyMult[MyMult[a,b],c],d]

This however is messy and I want to create a function that takes in an arbitrarily sized list and outputs this product with MyMult.

Any thoughts on a neat/efficient way of doing it? Preferably one-liner sort of deal so I can define a function with it.

$\begingroup$ Perhaps Fold might help? $\endgroup$ – Anne Dec 7 '17 at 4:02 — Anne, Dec 7 '17 at 4:02
$\begingroup$ Fold[myMult, L]? $\endgroup$ – kglr Dec 7 '17 at 4:04 — kglr, Dec 7 '17 at 4:04
$\begingroup$ Thank you so much! $\endgroup$ – Aakash Lakshmanan Dec 7 '17 at 4:20 — Aakash Lakshmanan, Dec 7 '17 at 4:20
$\begingroup$ SetAttributes[MyMult, Flat] might help. $\endgroup$ – Αλέξανδρος Ζεγγ Dec 7 '17 at 4:51 — Αλέξανδρος Ζεγγ, Dec 7 '17 at 4:51

kglr · Accepted Answer · 2017-12-07 07:35:56Z

1

Fold[myMult, {a, b, c, d}]

myMult[myMult[myMult[a, b], c], d]

answered Dec 7 '17 at 7:35

kglr

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