immutable-js/src/Set.js

Immutable types in JavaScript

import { SetCollection } from './Collection';
import { NativeObject, isNative } from './Native';

export var SET_TYPEDEF = '[SetCollection Set]';
export class Set extends SetCollection {
    constructor(object) {
        return makeSet(object);
    }

    toSet() {
        return this;
    }

    toString() {
        return this.__toString('Set {', this.__keys.join(','), '}');
    }

    set(key) {
        var copy = this.__internal.__clone();
        copy[key] = true;
        console.log(copy);
        return new Set(

        );
    }

    unset(key) {
        var reduc = delete this.__internal.clone()[key];
        return new Set(reduc);
    }

    __iterate(handle, reverse) {
        var object = this.__internal;
        var keys = this.__keys;
        var maxIndex = keys.length - 1;
        for(var n = 0; n <= maxIndex; n++) {
            let key = keys[reverse ? maxIndex - n: n];
            if(handle(object[key], key, this) === false) {
                return n + 1;
            }
        }
        return n;
    }
}

var EMPTY_SET;
function emptySet() {
    return EMPTY_SET || (EMPTY_SET = makeSet());
}

function makeSet(map, ownerID) {
    var set = Object.create(Set.prototype);
    set.__internal = new NativeObject();
    set.__ownerID = ownerID;
    if(map && isNative(map)) {
        set.__internal = map;
    } else if(map && typeof map === 'object') {
        set.__internal = set.__internal.extend(map);
    }
    set.__keys = Object.keys(set.__internal);
    set.size = set.__keys.length;
    return set;
}