var len=attr('length'),isString=partialComplete(isOfType,String);function defined(value){return value!==undefined;}
function hasAllProperties(fieldList,o){return(o instanceof Object)&&all(function(field){return(field in o);},fieldList);}
function cons(x,xs){return[x,xs];}
var emptyList=null,head=attr(0),tail=attr(1);function arrayAsList(inputArray){return reverseList(inputArray.reduce(flip(cons),emptyList));}