vtm/quelldatein/helfer/hashmap.ts

/*
 * Verrückte Turing-Maschinen — A turing complete game
 * Copyright (C) 2016 Christian Fraß <vidofnir@folksprak.org>
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

module mod_vtm
	{
		
		export module mod_helfer
			{
				
				export module mod_hashmap
					{
						
						/**
						 * @author kcf <vidofnir@folksprak.org>
						 */
						export type typ_hashmap<typ_schluessel, typ_wert> =
							{
								hashfunction : (schluessel : typ_schluessel)=>string;
								speicher : {[hashwert : string] : {schluessel : typ_schluessel; wert : typ_wert;}};
							}
						;
						
						
						/**
						 * @author kcf <vidofnir@folksprak.org>
						 */
						export function erstellen<typ_schluessel, typ_wert>
							(
								hashfunction : (schluessel : typ_schluessel)=>string
							)
							: typ_hashmap<typ_schluessel, typ_wert>
							{
								return {
									"hashfunction": hashfunction,
									"speicher": {},
								};
							}
						
						
						/**
						 * @author kcf <vidofnir@folksprak.org>
						 */
						export function setzen<typ_schluessel, typ_wert>
							(
								hashmap : typ_hashmap<typ_schluessel, typ_wert>,
								schluessel : typ_schluessel,
								wert : typ_wert
							)
							: void
							{
								let hashwert : string = hashmap.hashfunction(schluessel);
								hashmap.speicher[hashwert] = {"schluessel": schluessel, "wert": wert};
							}
						
						
						/**
						 * @author kcf <vidofnir@folksprak.org>
						 */
						export function holen<typ_schluessel, typ_wert>
							(
								hashmap : typ_hashmap<typ_schluessel, typ_wert>,
								schluessel : typ_schluessel
							)
							: lib_fehlermonade.typ_fehlermonade<typ_wert>
							{
								let hashwert : string = hashmap.hashfunction(schluessel);
								if (hashwert in hashmap.speicher)
									{
										let wert : typ_wert = hashmap.speicher[hashwert].wert;
										return (lib_fehlermonade.mod_schlicht.erstellen<typ_wert>(wert));
									}
								else
									{
										return (lib_fehlermonade.mod_nichts.erstellen<typ_wert>());
									}
							}
						
						
						/**
						 * @author kcf <vidofnir@folksprak.org>
						 */
						export function iterieren<typ_schluessel, typ_wert>
							(
								hashmap : typ_hashmap<typ_schluessel, typ_wert>,
								prozedur : (schluessel ?: typ_schluessel, wert ?: typ_wert)=>void
							)
							: void
							{
								Object.keys(hashmap.speicher).forEach
									(
										(hashwert) =>
											{
												let paar : {schluessel : typ_schluessel; wert : typ_wert;} = hashmap.speicher[hashwert];
												prozedur(paar.schluessel, paar.wert);
											}
									)
								;
							}
						
					}
				
			}
		
	}