JavaScript - Dividir array

var variable = [1, 2, [[3, 4, 5], 6, 7], 8, 9, 10, document.querySelectorAll ("body")[0]];

var variable = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, document.querySelectorAll ("body")[0]];

function convert(array) {

    var selectors = array.map(function(item) {

       if (item.nodeType) return item;

    });

    array = array.filter(function(item) {

        return (!item.nodeType);

    });

    var arr = array.join(' ').replace(/,/g, ' ').split(' ').map(function(item) {

        if (parseInt(item) > -1) return parseInt(item);

        return arr;

    });

    return arr.concat(selectors).filter(function(item) {

        return (typeof item !== "undefined");

    });

}

var modifiedNames = convert( [1, 2, [[3, 4, 5], 6, 7], 8, 9, 10, document.querySelectorAll ("body")[0]]);

console.log(modifiedNames);