var GetFastValue = function (source, key, defaultValue){ 
var t = typeof (source); 
if (!source || t === 'number' || t === 'string') { 
return defaultValue; 
} 
 else if (source.hasOwnProperty(key) && source[key] !== undefined) { 
return source[key]; 
} 
 else { 
return defaultValue; 
} 
} 
; 
module.exports = GetFastValue;