<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div style="width: 940px; margin: auto;">
<h4 id="original"></h4>
<ol id="result"></ol>
<button onclick="quick();">快排</button>
</div>
<script>
function quick() {
var a = [1,2,3,4,5,6,7,8,9,10], html = "", cnt = 0;
for( var i = 0; i < 10; i++ ) {
a[i] = randomNum(0, 100);
}
document.getElementById("original").innerText = "随机10位数组:" + a.toString().replace(/,/g, ', ');
function randomNum(min, max) {
return min + Math.floor( Math.random() * (max-min) );
}
function quickSort(a, b, e) {
if( e - b <= 1) return;
var m = randomNum(b, e);
var i = b, j = b + 1;
var tmp = a[i];
a[i] = a[m];
a[m] = tmp;
html += '<li><ol><li>第 ' + (i+1) + '(' + tmp + ')' + ' 与第 ' + (m+1) + '(' + a[i] + ')' + ' 交换,结果' + a.slice(b, e).toString().replace(/,/g, ', ') + '</li>';
while( i < e && j < e ) {
console.log(++cnt);
if( a[b] <= a[j] ) {
j++;
}
if( a[b] > a[j] ) {
tmp = a[j];
a[j++] = a[++i];
a[i] = tmp;
html += '<li>第 ' + (j) + '(' + tmp + ')' + ' 与第 ' + (i+1) + '(' + a[j-1] + ')' + ' 交换,结果' + a.slice(b, e).toString().replace(/,/g, ', ') + '</li>';
}
}
tmp = a[b];
a[b] = a[i];
a[i] = tmp;
html += '<li>第 ' + (b+1) + '(' + tmp + ')' + ' (随机数a['+ m + ']=' + tmp + ')与第 ' + (i+1) + '(' + a[b] + ')' + ' 交换,结果:' + a.slice(b, e).toString().replace(/,/g, ', ')+'</li></ol></li>';
quickSort(a, b, i);
quickSort(a, i+1, e);
}
quickSort(a, 0, a.length);
document.getElementById("result").innerHTML = html;
console.log(a.toString());
}
</script>
</body>
</html>
js 简单快排实现
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转载自blog.csdn.net/guduyibeizi/article/details/55509329
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