This isn't true. An admissible heuristic guarantees the optimal solution. With an inconsistent heuristic, A* can re-expand states multiple times, but will still end with an optimal path.
In other words, if the heuristic is consistent, then it implies that A* will expand the optimal number of states.
Totally agree. And when one of the suggestions for porting to Py3 is "Decide if the feature is really that important. Maybe you could drop it?", you know something is wrong.
I've been on Dvorak for 6 years now, and would call myself a vim power user. Never had an issue, but that might be because I can switch between qwerty and dvorak with ease (I use both at work every day).
I definitely like Dvorak a lot more. On the qwerty keyboard, I notice how much more finger stretching I have to do. Whether that actually makes a difference in typing speed or ergonomics, I have no idea. I switched one day out of pure boredom.
His method is a bit more complex, but you eventually need to describe how different frequencies change the characteristics of a system. Initially, it's nice to see impedance in terms of a + bi, but that's not easy to manipulate when you eventually want to know a circuit's behavior at various frequencies.
This is because (a + bi) does not inherently describe the sinusoidal behavior of AC. By changing things into the frequency domain (where writing a phasor implies a driving rotational force at some variable frequency), we can now see how the impedance of an entire system varies as frequency changes.
It's really just a math abstraction. Maybe this analogy is a stretch, but you interface with stacks using push and pop, and there's an inherent size to the stack that you keep in the back of your mind. You don't care about the individual memory addresses and their values, you just want to manipulate the stack such that it doesn't overflow/underflow. Just like AC - you don't care where in the complex plane an impedance is at a given frequency (which would be in terms of a+bi), you'd rather just see how its behavior changes as frequencies vary.
Let's not forget Deep Impact. Flew past two asteroids, and even threw something into the first one while taking pictures (with an incredible autonavigation system). Pretty awesome if you ask me.
I work at NASA, and I like to think that I have a personality...in fact, the center I work at is incredibly relaxed and basically has a collegiate atmosphere.