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January 25, 2011 03:34
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Pro JS Design Patterns Sample Code
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| <html> | |
| <head> | |
| <title>Chapter 6 Section 4, Pro JavaScript Design Patterns</title> | |
| </head> | |
| <body> | |
| <script> | |
| // this is straight from the code exampes at http://jsdesignpatterns.com/ | |
| // sadly, it fails with a syntax error. quoth JSLint: | |
| // | |
| // Error: | |
| // Problem at line 6 character 12: Label 'setName' on 'function' statement. | |
| // setName: function(newName) { | |
| // Problem at line 6 character 20: Missing name in function statement. | |
| // setName: function(newName) { | |
| // Problem at line 9 character 4: Expected an identifier and instead saw ','. | |
| // }, | |
| // Accessor without function callbacks: returning requested data in accessors. | |
| window.API = window.API || {}; | |
| API.prototype = function() { | |
| var name = 'Hello world'; | |
| // Privileged mutator method. | |
| setName: function(newName) { | |
| name = newName; | |
| return this; | |
| }, | |
| // Privileged accessor method. | |
| getName: function() { | |
| return name; | |
| } | |
| }(); | |
| // Implementation code. | |
| var o = new API; | |
| console.log(o.getName()); // Displays 'Hello world'. | |
| console.log(o.setName('Meow').getName()); // Displays 'Meow'. | |
| // Accessor with function callbacks. | |
| window.API2 = window.API2 || {}; | |
| API2.prototype = function() { | |
| var name = 'Hello world'; | |
| // Privileged mutator method. | |
| setName: function(newName) { | |
| name = newName; | |
| return this; | |
| }, | |
| // Privileged accessor method. | |
| getName: function(callback) { | |
| callback.call(this, name); | |
| return this; | |
| } | |
| }(); | |
| // Implementation code. | |
| var o2 = new API2; | |
| o2.getName(console.log).setName('Meow').getName(console.log); | |
| // Displays 'Hello world' and then 'Meow'. | |
| </script> | |
| </body> | |
| </html> |
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