How to use the forEach function from traverse

mutability.js

GitHub: jofelgandeza/budget

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    assert.deepEqual(obj, { a : 1, b : 20, c : [ 3, 40 ] });
};


exports.mutateT = function () {
    var obj = { a : 1, b : 2, c : [ 3, 4 ] };
    var res = Traverse.forEach(obj, function (x) {
        if (typeof x === 'number' && x % 2 === 0) {
            this.update(x * 10);
        }
    });

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