Enumeration class. Each enum propertiy has the properties "ordinal", "name" and "text".
Pada tanggal
Skrip ini tidak untuk dipasang secara langsung. Ini adalah pustaka skrip lain untuk disertakan dengan direktif meta // @require https://update.greasyfork.org/scripts/391854/745818/Enum.js
// ==UserScript==
// @name Enum
// @namespace hoehleg.userscripts.private
// @version 0.1
// @description Enumeration class. Each enum propertiy has the properties "ordinal", "name" and "text".
// @author Gerrit Höhle
// @grant none
// ==/UserScript==
/* jslint esnext: true */
const Enum = (() => {
const add = (thisObj, name, ordinal, text = "") => {
text = String(text);
const enumInstance = new class EnumProperty {
get ordinal() { return ordinal; }
get name() { return name; }
get text() { return text; }
[Symbol.toPrimitive](hint) { return (hint === "number") ? this.ordinal : this.text; }
valueOf() { return this.ordinal; }
toString() { return `object Enum ${this.name}`; }
}();
console.assert(typeof thisObj.name === "undefined", `duplicate enum [${name}]`);
console.assert(typeof thisObj.ordinal === "undefined", `duplicate ordinal [${ordinal}] for enum [${name}]`);
thisObj[name] = thisObj[ordinal] = enumInstance;
};
return class Enum {
constructor(firstOrdinal = 0, ordinalSupplier = previousOrdinal => previousOrdinal + 1) {
this._firstOrdinal = firstOrdinal;
this._ordinalSupplier = ordinalSupplier;
}
init(enumDef = []) {
let ordinal;
const firstOrdinal = this._firstOrdinal;
const ordinalSupplier = this._ordinalSupplier;
Object.getOwnPropertyNames(this).forEach(propName => delete this[propName]);
const ordinals = [];
for (let enumDefObj of (Array.isArray(enumDef) ? enumDef : [ enumDef ])) {
for (let [name, text] of Object.entries(enumDefObj)) {
ordinal = Number.parseInt((typeof ordinal === "undefined") ? firstOrdinal : ordinalSupplier(ordinal));
add(this, name, ordinal, text);
ordinals.push(ordinal);
}
}
const enums = [ ...new Set(ordinals) ].sort().map(ordinal => this[ordinal]);
this[Symbol.iterator] = () => enums[Symbol.iterator]();
return Object.freeze(this);
}
};
})();