SC functions to work on lists

[bchamagne]

Is your feature request related to a problem?

When writing SC, we need functions to be able to work on lists.

Describe the solution you'd like

We could add a map/filter/reduce. What would be the syntax?

Additional context

No response

[bchamagne]

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[samuelmanzanera]

I think we can create a new reduce function, which will serve all the purposes

[bchamagne]

I think we can create a new reduce function, which will serve all the purposes

What about the syntax, shoud we include elixir's lambdas in the SC?

reduce(list, 0, fn item, acc -> acc end)

[samuelmanzanera]

I think we can create a new reduce function, which will serve all the purposes

What about the syntax, shoud we include elixir's lambdas in the SC?

reduce(list, 0, fn item, acc -> acc end)

if we don't want to allow lamba functions and to simplify the language, we could leverage macro's style

agg = reduce inputs do
   ...
end

reduce inputs, acc: 0 do
   acc + 1
end

[netboz]

I was browsing some docs a few days ago, looking for equivalent of erlang's filtermap in Elixir, and I remember I read that all Enum api can be reproduced using two of the Enum module provided fonctions. Something like all logic operations can be made from NAND doors.
I will try to find back what are these two fonctions which could be good candidates for a port to smart contracts.

[samuelmanzanera]

Another proposition to help the readability as sentence

reduce get_calls(), as: input, with: [my_var_in_acc: 0] do
  
end