快速适应生活和学习环境。生活两点一线、定时定点,个人感觉又找到了高中生活的影子,每天学习新知识,接触、分析、练习、总结、掌握,总体下来每一天都很充实。
不足。基础知识不扎实,练习的少,学习不够系统使得各种知识没有形成联系,进而导致一知半解,没有养成定期总结的习惯,尤其是利用思维导图的形式进行分析与总结,这种方法不仅能更快理清思绪、还能使相关知识联系起来帮助记忆。
贪吃蛇游戏(存在不足:每次擦除蛇尾,虽然使得擦除不用遍历数组,但是蛇不能掉头;代码还需精简):
<html>
<head>
<meta charset="utf-8">
<title></title>
<style media="screen">
.wrap{
display: block;
margin: 0 auto;
}
#canvas{
display: block;
margin: 0 auto;
}
.button{
display: block;
margin: 0 auto;
}
</style>
<script type="text/javascript">
var arr = [{"x": '100', "y": '100'}, {"x": '125', "y": '100'}];
function paint(){
var canvas = document.getElementById("canvas")
var ctx = canvas.getContext("2d");
for(var n = 0; n <= 24; n++){
ctx.beginPath();
ctx.moveTo((25 * n), 0);
ctx.lineTo((25 * n), 600);
ctx.closePath();
ctx.stroke();
}
for(var m = 0; m <= 24; m++){
ctx.beginPath();
ctx.moveTo(0, (25 * m));
ctx.lineTo(600, (25 * m));
ctx.closePath();
ctx.stroke();
}
}
function draw() {
var canvas = document.getElementById("canvas");
if (canvas.getContext) {
var ctx = canvas.getContext("2d");
paint();
ctx.fillStyle='rgb(250, 0, 0)';
for(var i = 0; i <=arr.length-1; i++){
ctx.fillRect(arr[i].x, arr[i].y, 25, 25);
}
}
}
document.onkeydown = function(e){
var direction = e.keyCode;
var canvas = document.getElementById("canvas");
if (canvas.getContext) {
var ctx = canvas.getContext("2d");
switch (direction) {
case 37:
ctx.clearRect(arr[arr.length-1].x, arr[arr.length-1].y, 25, 25);
paint();
arr[1].x = arr[0].x;
arr[1].y = arr[0].y;
arr[0].x -= 25;
ctx.fillStyle = 'rgb(250, 0, 0)';
for(var i = 0; i <= arr.length-1; i++){
ctx.fillRect(arr[i].x, arr[i].y, 25, 25);
}
break;
case 38:
ctx.clearRect(arr[arr.length-1].x, arr[arr.length-1].y, 25, 25);
paint();
arr[1].x = arr[0].x;
arr[1].y = arr[0].y;
arr[0].y -= 25;
ctx.fillStyle = 'rgb(250, 0, 0)';
for(var i = 0; i <= arr.length-1; i++){
ctx.fillRect(arr[i].x, arr[i].y, 25, 25);
}
break;
case 39:
ctx.clearRect(arr[arr.length-1].x, arr[arr.length-1].y, 25, 25);
paint();
arr[1].x = arr[0].x;
arr[1].y = arr[0].y;
arr[0].x += 25;
ctx.fillStyle = 'rgb(250, 0, 0)';
for(var i = 0; i <= arr.length-1; i++){
ctx.fillRect(arr[i].x, arr[i].y, 25, 25);
}
break;
case 40:
ctx.clearRect(arr[arr.length-1].x, arr[arr.length-1].y, 25, 25);
paint();
arr[1].x = arr[0].x;
arr[1].y = arr[0].y;
arr[0].y += 25;
ctx.fillStyle = 'rgb(250, 0, 0)';
for(var i = 0; i <= arr.length-1; i++){
ctx.fillRect(arr[i].x, arr[i].y, 25, 25);
}
break;
default:
}
}
}
</script>
</head>
<body>
<div class="wrap">
<canvas id="canvas" width="600" height="600"></canvas>
</div>
<button type="button" name="button" onclick="draw()">start</button>
</body>
</html>
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