joshprk

/*
:l ./backprop.nix
results = train {
  w1 = 0.4;
  w2 = 0.15;
  w3 = 0.3;
  w4 = 0.26;
  lr = 0.05;
  X = [[1 1] [1 0] [0 0] [0 1]];
  Y = [1 0 0 0];