Creating list adding elements on specific conditions?

Questions & Help Questions
6

Thank you @josevalim and @gregvaughn!

I took a bit of everyone’s suggestions and ended up with this helper function which I think strikes the best balance for me; I’m not manipulating large lists on this occasion, so I opted for appending rather than prepending for convenience:

  def cond_append(list, false, _), do: list
  def cond_append(list, true, fun) do
    list ++ [fun.()]
  end
  def cond_append(list, bool_fun, value_fun) do
    if bool_fun.(), do: list ++ [value_fun.()], else: list
  end

I do have complex bool logic sometimes, hence the extra version accepting list, fun, fun.

Thanks everyone :beers: