public AOPSListGeneric<Integer> getIndices(E x) {
		LList<Integer> indices = new LList<Integer> ();
		
		Node ptr = this.head;
		
		for (int i = 0; ptr != null; ptr = ptr.next, i ++) {
			if (ptr.data.equals(x)) {
				indices.addToBack(i);
			}
		}
		
		return indices;
	}