weblab/js-random-coverage-test.html at master · bhoold/weblab · GitHub

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<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>js随机值覆盖测试</title>
    <meta name="viewport" content="width=device-width,initial-scale=1.0,maximum-scale=1.0,user-scalable=0,minimal-ui" />
    <meta name="renderer" content="webkit">
    <meta name="apple-mobile-web-app-capable" content="yes" />
    <meta name="apple-mobile-web-app-status-bar-style" content="black" />
    <meta name="format-detection" content="telphone=no,email=no">
    <meta name="apple-touch-fullscreen" content="yes">
    <meta name="apple-mobile-web-app-title" content="">
<style>
 html,
 body {
    margin:0;
    padding:0;
    width:100%;
    height:100%;
    font-size: 16px;
}
#container {
	position: relative;
	height: 400px;
}
.node {
    position: absolute;
    width: 24px;
    height: 25px;
    border-right: 1px solid black;
    border-bottom: 1px solid black;
}
.node.alive {
	background-color: lawngreen;
}
.horizontal-1 {
    border-top: 1px solid black;
}
.vertical-1 {
    border-left: 1px solid black;
}
h1, #tip {
	margin-left: 1em;
}
</style>
<script>
window.onload = function(){
	init();
	setTimeout(loop, interval);
}


const col = 15;
const row = 15;
const total = col*row; // 总数
const initAliveNum = 1;// 每代数量

const interval = 200; // 刷新间隔


let generation = 1; // 代数
let cellList = [];


function Cell(x, y) {
	this.x = x;
	this.y = y;
	this.isAlive = 0;
}


function loop() {
	generate();
	render();
	setTimeout(loop, interval);
	generation++;
	console.log(generation);
}


function init() {
	let x = 0, y = 0;
	for(let i = 0; i < total; i++) {

		//console.log(x, y);
		cellList.push(new Cell(x, y));

		y++;
		if(y >= col) {
			x++;
			y = 0;
		}
	}
}


function generate() {
	let list = [];
	for(let i = 0; i < total; i++) {
		list.push(i);
	}
	for(let i = 0; i < initAliveNum; i++) {
		let index = Math.floor((Math.random()*list.length-1)+1);
		let num = list[index];
		let cell = cellList[num];

		if(cell === undefined) {
			throw new Error('cell超出界限，num：'+num+' index：'+index);
			break;
		}

		cell.isAlive = 1;

		list.splice(index, 1);
	}
}


function render() {
	let elWrap = document.getElementById("container");
	let fragment = document.createDocumentFragment();

	for (let i = 1; i <= row; i++) {
		for (let j = 1; j <= col; j++) {
			let el = document.createElement("div");

			let cell = cellList[(i-1)*col+(j-1)];

			if(cell === undefined) {
				throw new Error('cell超出界限， index：'+(i-1)*col+(j-1));
				break;
			}

			el.className = "node" + " " + "horizontal-" + (cell.x+1) + " " + "vertical-" + (cell.y+1) + " " + "node-" + (cell.x+1) + "-" + (cell.y+1);
			el.style.top = ((cell.x+1) * 25) + "px";
			el.style.left = ((cell.y+1) * 24) + "px";
			fragment.appendChild(el);


			if(cell.isAlive) {
				el.className += " alive";
			}

		}
	}

	elWrap.innerHTML = "";
	elWrap.appendChild(fragment);
}


</script>
<body>
<h1>js随机值覆盖测试</h1>
<div id="container"></div>
</body>
</html>