collection-literals.md

Trying to collect some options discussed here and see what they look like with syntax highlighting from various threads (see reference).

// ruby
let map = { a => 1, b => 2, c => 3 };

// kotlin
let map = { a to 1, b to 2, c to 3 };

// swift
let map = [ a: 1, b: 2, c: 3]
let set = {1, 2, 3}

let map = {{ a: 1, b: 2, c:3 }};
let set = [[1, 2, 3]];
map[[a]]; // returns 1.

let set = {<1, 2, 3>};

let map = Map {a: 1, b: 2, c: 3};

let map = {|a: 1, b: 2, c:3|};
let set = {<1, 2, 3>};

let map = {: a: 1, b: 2, c: 3 :};
let set = {. 1, 2, 3 .};

// Are these impossible?
let map = <a: 1, b: 2, c:3>
let set = <1, 2, 3>;
map<a>; // returns 1

let map = { a = 1, b = 2, c = 3}

map{a}; // returns 1.

Notes:

[] = lists
() = tuples
{} = maps
<> = sets

Reference

• es-discuss thread
• twitter thread
• swift

@waldemarhorwat would you be able to eye-ball some of these options and identity which are syntactically feasible and which are not?