66 lines
1.6 KiB
HTML
66 lines
1.6 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<link rel="Stylesheet" type="text/css" href="style.css">
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<title>Bubble Sort</title>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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</head>
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<body>
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<h2 id="toc_0.1">Bubble Sort</h2>
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<dl>
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<dt>Stats</dt>
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<dd>Worst Case Performance: O(n<sup><small>2</small></sup>)</dd>
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<dd>Best Case Performance: O(n)</dd>
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</dl>
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<h3 id="toc_0.1.1">Optimized Psuedocode</h3>
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<p>
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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.
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</p>
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<pre>
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function bubbleSort(items) {
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n = count(items);
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swapped = false;
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while(!swapped) {
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swapped = false;
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for(i = 1; i < n; i++) {
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if(items[i-1] > items[i]) {
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tmp = items[i-1];
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items[i-1] = items[i];
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items[i] = tmp;
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swapped = true;
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}
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}
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n = n-1;
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}
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}
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</pre>
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<h3 id="toc_0.1.2">Unoptimized Psuedocode</h3>
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<pre>
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function bubbleSort(items) {
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swapped = false;
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while(!swapped) {
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swapped = false;
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for(i = 1; i < count(items); i++) {
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if(items[i-1] > items[i]) {
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tmp = items[i-1];
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items[i-1] = items[i];
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items[i] = tmp;
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swapped = true;
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}
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}
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}
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}
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</pre>
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<h3 id="toc_0.1.3">Additional Info</h3>
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<p>
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Wikipedia Article: [<a href="http://en.wikipedia.org/wiki/Bubble_sort]">http://en.wikipedia.org/wiki/Bubble_sort]</a>
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</p>
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</body>
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</html>
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