WEBVTT

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In this lecture I want to go over mental models a mental model for me is an abstract picture in my head

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that completely sums up an idea or a concept.

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It's an easier way of remembering and understanding something.

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For example let me draw my mental model for her gamming in general.

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So in my head I have this picture of a box in that box label Tran's for

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on the left.

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I usually have lines in the label this inputs or data

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in on the right.

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I have the output

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or results.

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It's a very simple picture but in fact it represents at least to me what programming is.

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You have this box that I label transport and this transform is really

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the algorithm.

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Now we have been talking about it will take that data or the input and transform it somehow into the

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output or result that we want.

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Now you may ask why is this useful.

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Anytime you get stuck on a problem or I don't know how to program something I can always go back and

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think about this mental model in my head and ask myself what do I want the result to be.

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Is always the first thing I think and then I'll skip the algorithms and transport part and all think

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OK.

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What do I have as the date.

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OK.

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Can I have and then I'll think about the output.

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Because if I know what I want the result to be and I know what kind of data should be in input into

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my algorithm Usually that makes or at least clears up the algorithm enough so I know how to start.

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So for example in our gaves let's say we want the player to move to the right

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that is the result.

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Well what is our data but say we have keyboard

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and the key we care about is the right key

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and we have a player let's say.

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And in that player we have his position.

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And maybe his velocity

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and of course since we have velocity will probably need time because velocities product time.

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So we know then that somehow we need to map the keyboard right.

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He to somehow change the position and velocity of where.

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So you see how this really helps you demystify the algorithm that we need to write.

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And later in the course I'll be showing you more of my mental models for different concepts that will

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go over in the next lecture will finally start coming up with a language to start to make these algorithms.