小玩意，利用遗传算法解决迷宫问题

var core = {
	start:8,
	end:5,
	bits:70,				//基因的长度
	group:[],				//基因组数据
	grouplen:140, 			//基因组的大小
	crossrate:0.7,			//杂交比例
	mutationrate:0.001,		//变异率
	startpointer:[0,2],		//起点坐标
	currentpointer:[0,2],		//当前位置
	endpointer:[14,7],		//终点坐标
	mum:"",					//杂交时候的目基因
	dad:"",					//杂交时候的父亲基因
	map:[
		[1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
		[1,0,1,0,0,0,0,0,1,1,1,0,0,0,1],
		[8,0,0,0,0,0,0,0,1,1,1,0,0,0,1],
		[1,0,0,0,1,1,1,0,0,1,0,0,0,0,1],
		[1,0,0,0,1,1,1,0,0,0,0,0,1,0,1],
		[1,1,0,0,1,1,1,0,0,0,0,0,1,0,1],
		[1,0,0,0,0,1,0,0,0,0,1,1,1,0,1],
		[1,0,1,1,0,0,0,1,0,0,0,0,0,0,5],
		[1,0,1,1,0,0,0,1,0,0,0,0,0,0,1],
		[1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
	],
	older:null,
	nepoch:1,
	count:0,
	sungroup:[],			//子代的基因组群体
	tempMap:[],
	finished:false,
	draw:function(data){
		console.log("线路图为",data);
		var me = this;
		me.currentpointer = me.startpointer;
		var nextpos  = null,
			max_x    = me.map[0].length,
			max_y    = me.map.length;
		//for(var i = 0 ; i < data.length ;i++){
		var m= 0;
		var t=setInterval(function(){
				if(m == data.length){
					clearInterval(t);
					return;
				}
				var index = m;
				var code = parseInt(data.charAt(index));
				var curpos = me.currentpointer,
					curpos_x = curpos[0],
					curpos_y = curpos[1];
				console.log(m);
				switch(code){
					case 0 : // 上
						if(curpos_y != 0){
							nextpos = [curpos_x,curpos_y-1];
						}
						break;
					case 1 : // 下
						if(curpos_y != max_y){
							nextpos = [curpos_x,curpos_y+1];
						}
						break;
					case 2 : // 左
						if(curpos_x != 0){
							nextpos = [curpos_x-1,curpos_y];
						}
						break;
					case 3 : // 右
						if(curpos_x != max_x){
							nextpos = [curpos_x+1,curpos_y];
						}
						break;
					default:
						break;
				}
				if(nextpos != null && me.map[nextpos[1]][nextpos[0]] == 5){
					// 走到终点了
					console.log(nextpos);
				}				
				if(nextpos != null && me.map[nextpos[1]][nextpos[0]] != 1){ // 可以行走
					me.currentpointer = nextpos;
					var ele = document.getElementById("map").getElementsByTagName("div");
					for(var i = 0 ; i < ele.length ; i++){
						var obj = ele[i],
							x = obj.getAttribute("x"),
							y = obj.getAttribute("y");
						if(me.currentpointer[0] == x && me.currentpointer[1] == y){
							me.addClass(obj,"step");
						}
					}
				}else{
					nextpos = this.currentpointer;
				}
				m++;
			},100);
			
	},
	addClass:function(obj,className){
		if(this.older){
			this.older.className = (" "+this.older.className+" ").replace(" "+className+" ","");
		}
		var olderclass = " " +obj.className+" ";
		this.older = obj;
		if(olderclass.indexOf(className) > -1){
			return;
		}else{
			obj.className += " "+className;
		}
	},
	vecBits:function(){
		var cbits = [],
			tmp = [];
		for(var i = 0 ; i < this.bits ;i++){
			var rbit = Math.floor(Math.random()*2);
			tmp.push(rbit);
			if(i % 2 != 0){
				cbits.push(parseInt(tmp.join(""),2));
				tmp = [];
			}
		}
		return "0|"+cbits.join(""); // 0为适应性分数 后面为整个的基因组
	},
	newGroup:function(){
		// 生成一个全新的子代全组
		this.gruop = [];
		for(var i = 0 ; i < this.grouplen ; i++){
			this.group.push(this.vecBits());
		}
	},
	testRoute:function(){
		// 测试每个路径走了多远，并且更新所有的适应性分数
		for(var i = 0 ; i < this.group.length ;i++){
			var vec = this.group[i],
				str = vec.split("|")[1];
			this.updateScore(str,i);	
		}
	},
	updateScore:function(str,index){
		// 0 , 1, 2, 3分别表示上下左右
		// 更新基因组的适应性分数
		
		for(var i = 0 ; i < str.length ; i++){
			var code = parseInt(str.charAt(i)),
				nextpos  = null,
				curpos = this.currentpointer,
				curpos_x = curpos[0],
				curpos_y = curpos[1],
				max_x    = this.map[0].length,
				max_y    = this.map.length;
			switch(code){
				case 0 : // 上
					if(curpos_y != 0){
						nextpos = [curpos_x,curpos_y-1];
					}
					break;
				case 1 : // 下
					if(curpos_y != max_y){
						nextpos = [curpos_x,curpos_y+1];
					}
					break;
				case 2 : // 左
					if(curpos_x != 0){
						nextpos = [curpos_x-1,curpos_y];
					}
					break;
				case 3 : // 右
					if(curpos_x != max_x){
						nextpos = [curpos_x+1,curpos_y];
					}
					break;
				default:
					break;
			}
			if(nextpos != null && nextpos[1] == 7 && nextpos[0] == 14){
				this.finished = true;
				core.draw(this.group[index].split("|")[1].substring(0,i+1));
				console.log("找到出口",i,this.group[index].split("|")[1],this.group[index].split("|")[1].substring(0,i+1));
				return;
				break;
			}else if(nextpos != null && this.map[nextpos[1]][nextpos[0]] != 1){ // 可以继续走
				this.currentpointer = nextpos;
			}else{
				nextpos = this.currentpointer;
			}
		}
		
		var arr = this.group[index].split("|");
		this.group[index] = this.getScore()+"|"+arr[1];
	},
	getScore:function(){
		var diffx = Math.abs(this.currentpointer[0] - this.endpointer[0]);
		var diffy = Math.abs(this.currentpointer[1] - this.endpointer[1]);
		this.currentpointer = this.startpointer;
		return (1/(diffx+diffy+1));
	},
	getTotalScore:function(){
		// 获取当前的所有积分
		var group = this.group,
			totalscore = 0;
		for(var i = 0 ; i < group.length ; i++){
			var score = group[i].split("|")[0];
			totalscore += parseFloat(score);
		}
		return totalscore;
	},
	wheel:function(){
		//滚轮算法
		var totalscore = Math.random()*this.getTotalScore(),
			ctotal = 0,
			selected = 0;
		for(var i = 0 ; i < this.grouplen ; i++){
			var score = this.group[i].split("|")[0];
			ctotal += parseFloat(score);
			//console.log(totalscore,ctotal);
			if(ctotal > totalscore){
				selected = i;
				break;
			}
		}
		return this.group[selected];
	},
	crossover:function(mum,dad){
		// num 为字符串 data也为字符串，不带具体的适应分数
		// 杂交函数
		if(Math.random() > this.crossrate || mum == dad){
			// 如果随机数大于杂交率 或者父亲和母亲一直，直接返回
			return [mum,dad];
		}
		var cp = Math.floor(Math.random()*(this.grouplen/2)),
			child1 = [],
			child2 = [];
		for(var i = 0 ; i < cp ;i++){
			child1.push(mum.charAt(i));
			child2.push(dad.charAt(i));
		}
		for(var i = cp ; i < mum.length ;i++){
			child1.push(dad.charAt(i));
			child2.push(mum.charAt(i));
		}
		return [child1.join(""),child2.join("")];
	},
	mutation:function(bit){
		// 变异函数
		var vec = this.toBits(bit).split("");
		for(var i = 0 ; i < vec.length ; i++){
			if(Math.random() < this.mutationrate){
				vec[i] = parseInt(vec[i]) == 0 ? 1 : 0;
			}
		}
		return this.toVec(vec.join(""));
	},
	toVec:function(data){
		var tmp = [],
			r = [];
		for(var i = 0 ; i < data.length ; i++){
			tmp.push(data.charAt(i));
			if(i%2 != 0){
				r.push(parseInt(tmp.join(""),2));
				tmp = [];
			}
		}
		return r.join("");
	},
	toBits:function(data){
		var bits = [];
		for(var i = 0 ; i < data.length ; i++){
			var bit = this.toBit(data.charAt(i));
			bits.push(bit);
		}
		return bits.join("");
	},
	toBit:function(data){
		// 转化为二进制
		switch(parseInt(data)){
			case 0:
				return "00";
				break;
			case 1:
				return "01";break;
			case 2:
				return "10";break;
			case 3:
				return "11";break;
			default:
				return "00";break;
		}
	},
	getEl:function(element){
		return typeof element == "string" ? document.getElementById(element):element;
	},
	initmap:function(element){
		var html = [],
			map = this.map;
		for(var i = 0 ; i < map.length ; i++){
			var row = [];
			for(var j = 0 ; j < map[i].length ;j++){
				row.push('<div class="box'+map[i][j]+'" x='+j+' y='+i+'></div>');
			}
			html.push(row.join(""));
		}
		//console.log(html);
		this.getEl(element).innerHTML = html.join("");
		
	},
	pochGroup:function(){
		
	},
	/**
	* 默认进行几个子代
	*/
	start:function(element,epoch){
		this.initmap(element);
		this.newGroup();
		return this;
	},
	/**
	*	一个时代开始
	*	第一步先更新每个的具体的分数值
	*	第二步渡轮生成新的子代
	*	第三步，新的子代进行杂交和变异
	*	时代结束
	*/
	epoch:function(){
		// 一个时代
		this.testRoute();
		if(this.finished){
			return;
		}
		var tmp = [];
		
		for(var i = 0 ; i < this.grouplen/2;i++){
			var mum = this.wheel().split("|")[1],
				dad = this.wheel().split("|")[1];
			var a = this.crossover(mum,dad);
			
			mum = this.mutation(a[0]);
			dad = this.mutation(a[1]);
			tmp.push("0|"+mum);
			tmp.push("0|"+dad);
		}
		this.group = tmp;
		this.nepoch++;
		this.count++;
		console.log("当前时代为"+this.nepoch);
		//var me = this;
		if(this.count < 100){
			core.epoch();
		}
	}
}
core.start("map",1).epoch();