// TODO
var i = 0,
    arr = ['Swift', 'ANSI C', 'DirectX'],
    p_node = document.querySelector('#test-list');

while(i < p_node.children.length) {
    if (arr.indexOf(p_node.children[i].innerText) >= 0) {
        p_node.removeChild(p_node.children[i]);
    }
    else {
        i ++;
    }
}