varfiddle=require('fiddle');//increment age by onevarfiddled=fiddle({$inc:{age:1}},null,{name: "Craig",age: 21});//{ name: "Craig", age: 22 }//check if the age is less than 22 before modifyingfiddled=fiddle({$inc:{$age:1}},{age:{$lt:22}},fiddled);//{ name: "Craig", age: 22 }//return a function insteadvarfiddler=fiddle({$inc:{n:1}});//modify itfiddler({name: "Joe"});//{ name: "Joe", n: 1}//modify multiplefiddler([{name: "Joe"},{name: "John "}])