The bang (!) operator in elm

Question

What does the bang (or exclamation mark) operator do in elm? I saw an application with an init like this:

init = emptyModel ! []

I've tried looking in the elm docs, but either there is no info or I couldn't find it:)

score 14 · Accepted Answer · edited Oct 27 '16 at 08:08

14

The definition of the ! operator is here.

It takes a model, a list of commands and returns a tuple (pair) with a model and a single command which is the batch of all the commands

edited Oct 27 '16 at 08:08

swelet

answered Jul 22 '16 at 11:34

marcosh

1

Note that the `!` operator has been removed in Elm 0.19. See below: https://github.com/elm/compiler/blob/master/upgrade-docs/0.19.md#functions-removed – bowsersenior Dec 04 '18 at 20:13

1 Answers1