b0oh

function array_union(a, b) {
    var cache = {};
    function store(item) {
        cache[item] = item;
    }

    a.forEach(store);
    b.forEach(store);

    return Object.keys(cache).map(function(key) { return cache[key]; });

b0oh

module Lambda where

import Data.Set (Set)
import Data.Set qualified as Set
import Data.Text (Text)
import Data.Text qualified as Text

newtype Symbol = Symbol Text
  deriving (Eq, Ord, Show)