var sheep=[
{"height":20,"name":"Melvin"},
{"height":18,"name":"Betsy"}
];
var clonedSheep=JSON.parse(JSON.stringify(sheep)); //clone array of objects
//note: cloning like this will not work with some complex objects such as:  Date(), undefined, Infinity
// For complex objects try: lodash's cloneDeep() method or angularJS angular.copy() method