'use strict';
var traverse = require('traverse');
var obj = {
a: [1, 2, 3],
b: 4,
c: [5, 6],
d: { e: [7, 8], f: 9 },
};
var leaves = traverse(obj).reduce(function (acc, x) {
if (this.isLeaf) { acc.push(x); }
return acc;
}, []);
console.dir(leaves);