Created
March 28, 2012 21:26
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A simple example of #bit operator
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| window.onload = function(){ | |
| Compass = { North:1, South:2, Est:4, West:8 }; | |
| var move = function(step) { | |
| dir = []; | |
| if (step & Compass.North) dir.push('North'); | |
| else if (step & Compass.South) dir.push('South'); | |
| if (step & Compass.Est) dir.push('Est'); | |
| else if (step & Compass.West) dir.push('West'); | |
| document.write( step + ': ' + dir.join(' ') + '<br/>' ); | |
| } | |
| move( 1 ); // North (1) | |
| move( 2 ); // + South (2) | |
| move( 4 ); // + + Est (4) | |
| move( 5 ); // North (1) + + Est (4) | |
| move( 6 ); // + South (2) + Est (4) | |
| move( 8 ); // + West (8) | |
| move( 9 ); // North (1) + + + West (8) | |
| move( 10); // + South (2) + + West (8) | |
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Bit operator</title> | |
| <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> | |
| </head> | |
| <body> | |
| <script type="text/javascript" src="direction.js"></script> | |
| <body> | |
| </html> |
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