ch06 random_walk td method

[Perseus1993]

why reward = 0 in all state?

should be
reward = 1 if cur_state == 6 else 0

[kevroi]

Since we get a reward for reaching the right terminal state, we can set its value to be 1 rather than having a reward function where reward = 1 if cur_state == 6. This trick of setting all rewards to 0 was used in the Gamblers Problem (Example 4.3) too.