Map,Filter and Reduce

var maps=[1,2,3,4,5].map(function(n){return n*2;});
console.log(maps);

var filters=[1,2,3,4,5,6,7].filter(function(n){return n%2 == 0;});
console.log(filters);
var reduce=[1,2,3,4,5,6,7].reduce(function(accumulator,n){return  n+accumulator;});
console.log(reduce);