gistfile1.js

var _ = require('underscore');

var obj = {
    one_level_string: "1",
    one_level_array: ["hey", "there"],
    two_levels: {
        a: "a",
        b: "b",
        c: ["ccc", "ddd"],
        d: {
            hi: "hi",
            no_item: null
        },
        e: [{ ha: "yay" }]
    }
}

function recursive_check(input) {
    if (!input) return;

    if (_.isArray(input)) {
        for (var i = 0; i < input.length; i++) {
            recursive_check(input[i]);
        }
    } else if (_.isObject(input)) {
        for (key in input) {
            recursive_check(input[key]);
        }
    } else if (typeof input == 'string') {
        console.log(">", input, "\n");
    } else {
        return;
    }
}

recursive_check(obj);