regExp.js

/**
 * Created with JetBrains WebStorm.
 * User: user1
 * Date: 27.12.12
 * Time: 10:58
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 */
var inp = [
        'http://bryntum.com/examples-1.2.3/advanced/advanced.html',
        'http://bryntum.com/doc/1.2.3/foo/bar.html',
        'http://cdn.sencha.io/ext-3.4.0/ext-all-debug.js',
        'http://cdn.sencha.io/ext-3.4.0-beta-1/ext-all.js',
        'http://cdn.sencha.io/extjs-4.1.0-rc-1/ext-all-debug.js'
    ],
    out = [];

(function quiz2 (ar) {
    ar.forEach(function(item) {
        var re = new RegExp('ext(js)?-(.*)/', 'g');
        var result = re.exec(item);
        var version = result ? result[2] : 'N/A';
        out.push(version);
        console.log(item, '->', version);
    });
} (inp));