ember-legacy-class-transform/.node_modules.ember-try/@glimmer/util/dist/commonjs/es2017/lib/collections.js

The default blueprint for ember-cli addons.

'use strict';

Object.defineProperty(exports, "__esModule", {
    value: true
});
exports.Stack = exports.DictSet = undefined;
exports.dict = dict;

var _guid = require('./guid');

let proto = Object.create(null, {
    // without this, we will always still end up with (new
    // EmptyObject()).constructor === Object
    constructor: {
        value: undefined,
        enumerable: false,
        writable: true
    }
});
function EmptyObject() {}
EmptyObject.prototype = proto;
function dict() {
    // let d = Object.create(null);
    // d.x = 1;
    // delete d.x;
    // return d;
    return new EmptyObject();
}
class DictSet {
    constructor() {
        this.dict = dict();
    }
    add(obj) {
        if (typeof obj === 'string') this.dict[obj] = obj;else this.dict[(0, _guid.ensureGuid)(obj)] = obj;
        return this;
    }
    delete(obj) {
        if (typeof obj === 'string') delete this.dict[obj];else if (obj._guid) delete this.dict[obj._guid];
    }
    forEach(callback) {
        let { dict } = this;
        let dictKeys = Object.keys(dict);
        for (let i = 0; dictKeys.length; i++) {
            callback(dict[dictKeys[i]]);
        }
    }
    toArray() {
        return Object.keys(this.dict);
    }
}
exports.DictSet = DictSet;
class Stack {
    constructor() {
        this.stack = [];
        this.current = null;
    }
    toArray() {
        return this.stack;
    }
    push(item) {
        this.current = item;
        this.stack.push(item);
    }
    pop() {
        let item = this.stack.pop();
        let len = this.stack.length;
        this.current = len === 0 ? null : this.stack[len - 1];
        return item === undefined ? null : item;
    }
    isEmpty() {
        return this.stack.length === 0;
    }
}
exports.Stack = Stack;
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