gremlin_3

gremlin_3.js

var arr = [3, 4, 9, 14, 15, 19, 28, 37, 47, 50, 54, 56, 59, 61, 70, 73, 78, 81, 92, 95, 97, 99]
//var arr = [1,2,3,4,6]
function powerset(ary) {
    var ps = [[]];
    for (var i=0; i < ary.length; i++) {
        for (var j = 0, len = ps.length; j < len; j++) {
            ps.push(ps[j].concat(ary[i]));
        }
    }
    return ps;
}

sets = powerset(arr)
count = 0
sets.forEach(function(node) {
    var max = Math.max.apply(Math, node)
    var rest = node.reduce(function(a,b) {return a + b},0) - max;
    if (max == rest)
        count++
})

console.log(count)

This code didn't run for me. Missing a lot of semi-colons. How did you test it?

Yup it's run alright, i ran it on node, still takes a good 12.938 secs to run, probably will crash the browser :D
there are 4194304 sub sets in the power set :P