Calling an anonymus function without appending () ?

[bengt e]

Greetings,

Beginner question (still doing the getting started). Can I call an anonymus function (in a variable) without appending ()?

Given
iex(1)> f = fn () -> 1 end
#Function<20.90072148/0 in :erl_eval.expr/5>

Is there a way to call #Function<20.90072148/0 that does not involve () as shown below

iex(3)> f  .  ()
1


Previously in this group I have been shown that defining functions sometimes needs (), so I am always adding them when defining.
Are () also needed sometimes when calling?


bengt

[José Valim]

No, it is not possible.

> Previously in this group I have been shown that defining functions sometimes needs (), so I am always adding them when defining.

Well, it is not that they are required. The issue is that skipping them is ambiguous and would need to solve the ambiguity. Adding the parens are one way to solve it.

The most straight-forward thing to do when getting started, and the one we follow in our docs, is to always us parenthesis.

José Valim

www.plataformatec.com.br

Skype: jv.ptec

Founder and Director of R&D

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