gistfile1.js

[
    100000,
    200000,
    300000
]

// vs

[100000,
 200000,
 300000]

// i.e.

.map(function (file) {                                                                                                                    
    return rowJSON(                                                                                                                       
        [                                                                                                                                 
            '/actions/download-export.xml?regionId=',                                                                                     
            regionId,                                                                                                                     
            '&fileName',                                                                                                                  
            encodeURIComponent(file)                                                                                                      
        ].join(''),                                                                                                                       
        file.split('.').slice(-1)[0]);                                                                                                    
});

// vs

.map(function (file) {                                                                                                                    
    return rowJSON(                                                                                                                       
        ['/actions/download-export.xml?regionId=',                                                                                     
         regionId,                                                                                                                     
         '&fileName',                                                                                                                  
         encodeURIComponent(file)].join(''),                                                                                                                       
        file.split('.').slice(-1)[0]);                                                                                                    
});

.map(function (file) {
    return rowJSON(
        [   
            '/actions/download-export.xml?regionId=' + jQuery.param({
                regionId: regionId,
                filename: file
            })  
        ]   
            .join(''),
        file
            .split('.')
            .slice(-1)[0]
    );                                                                                                                                                                            
});