use index instead of hash
use index instead of hash

hvy/chainer,chainer/chainer,rezoo/chainer,keisuke-umezawa/chainer,niboshi/chainer,okuta/chainer,niboshi/chainer,ktnyt/chainer,ktnyt/chainer,chainer/chainer,keisuke-umezawa/chainer,okuta/chainer,okuta/chainer,keisuke-umezawa/chainer,ktnyt/chainer,ktnyt/chainer,wkentaro/chainer,hvy/chainer,keisuke-umezawa/chainer,pfnet/chainer,wkentaro/chainer,chainer/chainer,wkentaro/chainer,jnishi/chainer,anaruse/chainer,jnishi/chainer,jnishi/chainer,ronekko/chainer,okuta/chainer,wkentaro/chainer,chainer/chainer,niboshi/chainer,hvy/chainer,tkerola/chainer,jnishi/chainer,hvy/chainer,aonotas/chainer,niboshi/chainer