Semiautovivification

[anhnhoktvn]

It's nice to have Semiautovivification from livescript

[STRd6]

We can currently do something similar with:

x = {}
(x.'hello world' ?= []).2 = 3

I'm not convinced that an additional specialized syntax is worth it in this case.

[anhnhoktvn]

I just used it a lot in past. Quite elegant. How do we do this

x.[]arr.{}1.y = 9

in Civet way?

[STRd6]

Currently:

( ( x.arr ?= [] )[1] ?= {} ).y = 9

It may make sense to try something like this for a possible future syntax:

x.arr?=[][1]?={}.y = 9

[STRd6]

Now that we have pipes:

x |> .foo ?= [] |> .append 5
x |> .foo ?= {} |> &[key] ?= [] |> .push value

(x.foo ??= []).append(5);
((x.foo ??= {})[key] ??= []).push(value);