vim-castle/.vim/vimwiki/vimwiki_html/Bubble Sort.html

66 lines
1.6 KiB
HTML
Raw Normal View History

2015-01-14 23:41:47 +00:00
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<link rel="Stylesheet" type="text/css" href="style.css">
<title>Bubble Sort</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<h2 id="toc_0.1">Bubble Sort</h2>
<dl>
<dt>Stats</dt>
<dd>Worst Case Performance: O(n<sup><small>2</small></sup>)</dd>
<dd>Best Case Performance: O(n)</dd>
</dl>
<h3 id="toc_0.1.1">Optimized Psuedocode</h3>
<p>
Bubble Sort can be optimized by observing that the n-th pass finds the n-th largest element and puts it into its final place. So the inner loop can avoid looking at the last n-1 items when running for the n-th time.
</p>
<pre>
function bubbleSort(items) {
n = count(items);
swapped = false;
while(!swapped) {
swapped = false;
for(i = 1; i &lt; n; i++) {
if(items[i-1] &gt; items[i]) {
tmp = items[i-1];
items[i-1] = items[i];
items[i] = tmp;
swapped = true;
}
}
n = n-1;
}
}
</pre>
<h3 id="toc_0.1.2">Unoptimized Psuedocode</h3>
<pre>
function bubbleSort(items) {
swapped = false;
while(!swapped) {
swapped = false;
for(i = 1; i &lt; count(items); i++) {
if(items[i-1] &gt; items[i]) {
tmp = items[i-1];
items[i-1] = items[i];
items[i] = tmp;
swapped = true;
}
}
}
}
</pre>
<h3 id="toc_0.1.3">Additional Info</h3>
<p>
Wikipedia Article: [<a href="http://en.wikipedia.org/wiki/Bubble_sort]">http://en.wikipedia.org/wiki/Bubble_sort]</a>
</p>
</body>
</html>