How do I use a floor nailer near the wall?
Usually you can hand toenail all but the last two rows, thus hiding the nails. Pre-drill pilot holes just above the tongue (same angle and placement as nailer would have done) and set the nails. You can use a wedge and blocks to tighten and hold the slats for nailing.  The last couple of rows should be glued and face nailed. Counter sink the nails and fill with a matching filler. If the floor is prefinished, then the manufactured probably offers a matching filler.  If it is unfinished, be sure to use a stain-able filler.