为什么顺序是0 7 2 4？？？?完全不理解
为什么顺序是0 7 2 4？？？?完全不理解
1 回答
题目给的数值是
var arr = ['*','##',"***","&&","****","##*"];
arr[7] = "**";
而array里面拆开得到的数值是
arr[0] = *
arr[1] = ##
arr[2] = ***
arr[3] = &&
arr[4] = ****
arr[5] = ##*
所以你得到0724
但我觉得这样写会比较符合题目要求
<!DOCTYPE HTML>
<html >
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>数组</title>
<script type="text/javascript">
//创建数组
var arr = ['*','##',"***","&&","****","##*"];
//显示数组长度
var length = arr.length;
arr[7] = "**";
//将数组内容输出，完成达到的效果。
var row = 4;
var row_count = 0;
for(var i=0; i<length; i++){
row_count++;
if(row_count<=row){
if(arr[i].length == i+1){
if(arr[i].indexOf('*') === -1)
document.write(arr[7]+"<br>");
else if(arr[i].length == (i+1)){
document.write(arr[i]+"<br>");
}
}
else{
for(var j=0; j<i+1; j++){
document.write("*");
}
document.write("<br>");
}
}
}
</script>
</head>
<body>
</body>
</html>举报
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