1# options.js #
 2
 3A very light-weight in-code option parsers for node.js.
 4
 5## Usage ##
 6
 7``` js
 8var Options = require("options");
 9
10// Create an Options object
11function foo(options) {
12        var default_options = {
13                foo : "bar"
14        };
15        
16        // Create an option object with default value
17        var opts = new Options(default_options);
18        
19        // Merge options
20        opts = opts.merge(options);
21        
22        // Reset to default value
23        opts.reset();
24        
25        // Copy selected attributes out
26        var seled_att = opts.copy("foo");
27        
28        // Read json options from a file. 
29        opts.read("options.file"); // Sync
30        opts.read("options.file", function(err){ // Async
31                if(err){ // If error occurs
32                        console.log("File error.");
33                }else{
34                        // No error
35                }
36        });
37        
38        // Attributes defined or not
39        opts.isDefinedAndNonNull("foobar");
40        opts.isDefined("foobar");
41}
42
43```
44
45
46## License ##
47
48(The MIT License)
49
50Copyright (c) 2012 Einar Otto Stangvik <einaros@gmail.com>
51
52Permission is hereby granted, free of charge, to any person obtaining
53a copy of this software and associated documentation files (the
54'Software'), to deal in the Software without restriction, including
55without limitation the rights to use, copy, modify, merge, publish,
56distribute, sublicense, and/or sell copies of the Software, and to
57permit persons to whom the Software is furnished to do so, subject to
58the following conditions:
59
60The above copyright notice and this permission notice shall be
61included in all copies or substantial portions of the Software.
62
63THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
64EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
65MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
66IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
67CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
68TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
69SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.