A super-small javascript lambda function

lamb.js

/*
lamb.js
4 lines to lambda
*/

function lamb(s){
     args = s.split("->")
     return new Function(args[0], "return "+args[1])
}

/*
Example
var five = lamb(”a -> a+1")(4)
Test code

if (!lamb("c -> c * 5)(6) === 30) throw new Error("Something's amiss...")
else console.log("Passed")
*/