Created
December 27, 2011 16:16
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Breadth-first Graph Traversal in JavaScript
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset=utf-8 /> | |
| <title>A Graph</title> | |
| <!--[if IE]> | |
| <script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script> | |
| <![endif]--> | |
| <style> | |
| article, aside, figure, footer, header, hgroup, | |
| menu, nav, section { display: block; } | |
| </style> | |
| </head> | |
| <body> | |
| <p id="hello">Hello World</p> | |
| <script src="graph.js"></script> | |
| </body> | |
| </html> |
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| var G = { | |
| vertices: [{ | |
| edges: [1, 4] | |
| }, { | |
| edges: [0, 2, 3, 4] | |
| }, { | |
| edges: [1, 3] | |
| }, { | |
| edges: [1, 2, 4] | |
| }, { | |
| edges: [0, 1, 3] | |
| }] | |
| }; | |
| (function (G, s) { | |
| var i, Q = [], | |
| u, v; | |
| for (i = 0; i < G.vertices.length; i += 1) { | |
| G.vertices[i].color = 'white'; | |
| G.vertices[i].distance = Number.POSITIVE_INFINITY; | |
| G.vertices[i].parent = null; | |
| } | |
| G.vertices[s].color = 'grey'; | |
| G.vertices[s].distance = 0; | |
| G.vertices[s].parent = null; | |
| Q.push(s); | |
| while (Q.length > 0) { | |
| u = Q.splice(0, 1)[0]; | |
| for (i = 0; i < G.vertices[u].edges.length; i += 1) { | |
| v = G.vertices[u].edges[i]; | |
| if (G.vertices[v].color === 'white') { | |
| G.vertices[v].color = 'grey'; | |
| G.vertices[v].distance = G.vertices[u].distance + 1; | |
| G.vertices[v].parent = u; | |
| Q.push(v); | |
| } | |
| } | |
| G.vertices[u].color = 'black'; | |
| } | |
| })(G, 0); | |
| if (document.getElementById('hello')) { | |
| document.getElementById('hello').innerHTML = JSON.stringify(G); | |
| } |
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