add generatlized

script.md

@@ -105,36 +105,11 @@ There, now, we can make sure our friends are happy on their birthdays!
 
 But, this is getting annoying; what about Christmas, Thanksgiving, or Easter? Making a new black box to make a list of new cards, going through each person, every single time to construct a list of cards, is getting really tedious.
 
-What if we generalized this? We create a bunch of black boxes that take a person, and generate them a card, specifically; like a template for a card you could print off and fill in manually.
+[SPACE] What if we generalized this? [SPACE] We create a couple of black boxes that take a person, and generate them a card, specifically; like a template for a card you could print off and fill in manually. Like this, for alan turing.
 
-```python
+Then, we can use a new black box that takes a list of people, and applies this template to each person.
-def valentine_letter(person):
-	return f"Dear, {person.name}\nYour smile lights up my world. Happy Valentine's Day!")
 
-def birthday_card(person):
+The ability in a language to pass a function around like this - like a variable - is what makes functions "first class". And the `buildCards` function takes a function as input, making it a "higher order function".
-	today = new Date()
-	daysUntilBirthday = toDays(new Date(person.birthday, today.year) - today)
-	newAge = today.year - person.birthday.year
-
-	card = f"Happy Birthday {name}\nI can't believe you're already {newAge} years old!"
-	cards.append({ "message": card, "deliverInDays": daysUntilBirthday })	
-```
-
-Then, we can use a black box that takes a list of people, and applies this template to each person.
-
-```
-def buildCards(people, cardMaker):
-	cards = []
-	for person in people:
-		card = cardMaker(person)
-		cards.append(card)
-	return cards
-	
-people = [{"name": "Joseph", birthday: new Date()}, {"name": "DeeDee", birthday: new Date()}]
-buildCards(people, birthdayCard)
-```
-
-The ability in a language to pass a function around like this - like a variable - is what makes functions "first class". And the `buildCards` function takes a function as input, making it a "higher order function". (TODO: slides)
 
 Functional Reproduction
 ===
@@ -211,7 +186,7 @@ Immutability
 ===
 We briefly mentioned side effects and alluded them to the unpredictability of a partner. We love our black boxes because they're reliable.
 
-But, we've actually had an impostor among us (AMOGUS sound??) throughout this presentation. Specifically in ~buildCards~:
+But, we've actually had an impostor among us (AMOGUS sound??) throughout this presentation. Specifically in `buildCards`:
 
 ```
 def buildCards(people, cardMaker):
@@ -244,7 +219,7 @@ def build_cards(people, card_maker):
 	return [card] + build_cards(rest_people, card_maker)
 ```
 
-Here we're not changing anything at all (except the stack), with the same functionality; this code is "immutable". When we call ~build_cards~ on a list of people, we're 100% certain we're not gonna get something odd short of a bug.
+Here we're not changing anything at all (except the stack), with the same functionality; this code is "immutable". When we call `build_cards` on a list of people, we're 100% certain we're not gonna get something odd short of a bug.
 
 At a high level there are so many benefits to immutability:
 + Concurrency (TODO: go into more detail)

src/components/function_box.tsx

@@ -86,7 +86,7 @@ export class FunctionBox extends Node {
         alignItems={"center"}
         layout
       >
-        <Rect direction={"column"} alignItems={"end"}>
+        <Rect direction={"column"} alignItems={"end"} gap={10}>
           {range(this.arity).map((i) => (
             <Rect direction={"row"} alignItems={"center"} gap={10}>
               <Rect
@@ -116,8 +116,9 @@ export class FunctionBox extends Node {
           fill={theme.crust.hex}
           lineWidth={4}
           padding={60}
-          direction={"row"}
+          direction="row"
-          height={"100%"}
+          height="100%"
+          alignItems="center"
         >
           <Txt fontFamily={theme.font} fill={theme.text.hex} ref={this.boxMoji}>
             {this.idlingText}
@@ -273,7 +274,6 @@ export class FunctionBox extends Node {
           <CodeBlock
             fontFamily={theme.font}
             language="typescript"
-            fontSize={this.outputFontSize}
             code={JSON.stringify(output, null, 2)}
           ></CodeBlock>,
         );

src/scenes/birthday_letters.tsx

@@ -13,13 +13,13 @@ import { FunctionBox } from "../components/function_box";
 import { theme } from "../theme";
 import { PEOPLE, Person, PersonI } from "../components/person";
 
-const daysUntilNextBirthday = (birthDate: Date): number => {
+export const daysUntilNextDate = (date: Date): number => {
   const today = new Date();
 
   const nextBirthday = new Date(
     today.getFullYear(),
-    birthDate.getMonth(),
+    date.getMonth(),
-    birthDate.getDate(),
+    date.getDate(),
   );
   if (today > nextBirthday) nextBirthday.setFullYear(today.getFullYear() + 1);
 
@@ -45,7 +45,7 @@ export const birthdayCardsFor = (people: PersonI[]): CardI[] => {
       `Happy ${age}${ending} birthday, ${person.name}!\n` +
       "I can't believe it's already been a year!";
 
-    const deliverInDays = daysUntilNextBirthday(person.birthday);
+    const deliverInDays = daysUntilNextDate(person.birthday);
     cards.push({ deliverInDays, message });
   }
 
@@ -70,7 +70,7 @@ const birthdayCardsFor = (people: PersonI[]): CardI[] => {
       \`Happy \${age}\${ageEnding} birthday, \${person.name}!\\n\` +
       "I can't believe it's already been a year!";
 
-    const deliverInDays = daysUntilNextBirthday(person.birthday);
+    const deliverInDays = daysUntilNextDate(person.birthday);
     cards.push({ deliverInDays, message });
   }
 

src/scenes/generalized.meta

@@ -0,0 +1,5 @@
+{
+  "version": 0,
+  "timeEvents": [],
+  "seed": 3138224359
+}

src/scenes/generalized.tsx

@@ -0,0 +1,212 @@
+import { Layout, Txt, makeScene2D } from "@motion-canvas/2d";
+import {
+  Direction,
+  all,
+  beginSlide,
+  createRef,
+  slideTransition,
+} from "@motion-canvas/core";
+
+import { FunctionBox } from "../components/function_box";
+import { PEOPLE, Person, PersonI } from "../components/person";
+import { CardI, daysUntilNextDate } from "./birthday_letters";
+
+const valentineCardFn = (person: PersonI): CardI => {
+  const valentinesDay = new Date("02/14/2024");
+  const message =
+    `Dear, ${person.name}\n.` +
+    "Your smile lights up my world.\n" +
+    "Happy Valentine's Day!";
+  const deliverInDays = daysUntilNextDate(valentinesDay);
+  return { message, deliverInDays };
+};
+
+const birthdayCardFn = (person: PersonI): CardI => {
+  const age = new Date().getFullYear() - person.birthday.getFullYear();
+  const ending =
+    ({ 1: "st", 2: "nd", 3: "rd" } as Record<number, string>)[
+      parseInt(Array.from(age.toString()).at(-1))
+    ] ?? "th";
+  const message =
+    `Happy ${age}${ending} birthday, ${person.name}!\n` +
+    "I can't believe it's already been a year!";
+
+  const deliverInDays = daysUntilNextDate(person.birthday);
+  return { deliverInDays, message };
+};
+
+const valentineCardGenerator = `const valentineCardGenerator = (person: PersonI): CardI => {
+  const valentinesDay = new Date("02/14/2024");
+  const message =
+    \`Dear, \${person.name}\\n.\` +
+    "Your smile lights up my world.\\n" +
+    "Happy Valentine's Day!";
+  const deliverInDays = daysUntilNextDate(valentinesDay);
+  return { message, deliverInDays };
+};`;
+
+const birthdayCardGenerator = `const birthdayCardGenerator = (person: PersonI): CardI => {
+  const age = new Date().getFullYear() - person.birthday.getFullYear();
+  const ageEnding = (
+    { 1: "st", 2: "nd", 3: "rd" } as Record<number, string>
+  )[parseInt(Array.from(age.toString()).at(-1))] ?? "th";
+
+  const message =
+    \`Happy \${age}\${ageEnding} birthday, \${person.name}!\\n\` +
+    "I can't believe it's already been a year!";
+
+  const deliverInDays = daysUntilNextDate(person.birthday);
+  return { deliverInDays, message };
+}`;
+
+const cardBuilder = `const buildCards = (
+  people: PersonI[],
+  cardGenerator: (person: PersonI) => CardI,
+): CardI[] => {
+  const cards: CardI[] = [];
+
+  for (const person of people) {
+    const card = cardGenerator(person);
+    cards.push(card);
+  }
+
+  return cards;
+};
+buildCards;`;
+
+export default makeScene2D(function* (view) {
+  const valentineFunctionBox = createRef<FunctionBox>();
+  const birthdayFunctionBox = createRef<FunctionBox>();
+  const cardBuilderBox = createRef<FunctionBox>();
+  const layout = createRef<Layout>();
+
+  view.add(
+    <Layout direction="row" gap={200} ref={layout} layout>
+      <Layout direction="column" alignItems="center" gap={20}>
+        <FunctionBox
+          ref={valentineFunctionBox}
+          source={valentineCardGenerator}
+          fn={valentineCardFn}
+          idlingText="❤️"
+          workingText="📝⚙"
+          outputFontSize={15}
+        ></FunctionBox>
+        <FunctionBox
+          ref={birthdayFunctionBox}
+          source={birthdayCardGenerator}
+          fn={birthdayCardFn}
+          idlingText="🎂"
+          workingText="📝⚙"
+          outputFontSize={15}
+        ></FunctionBox>
+      </Layout>
+      <Layout direction="column" gap={20}>
+        <FunctionBox
+          ref={cardBuilderBox}
+          source={cardBuilder}
+          idlingText="🏭"
+          workingText="📝⚙"
+          outputFontSize={15}
+          arity={2}
+        ></FunctionBox>
+      </Layout>
+    </Layout>,
+  );
+
+  yield* all(
+    slideTransition(Direction.Left),
+    ...[valentineFunctionBox, birthdayFunctionBox, cardBuilderBox].map((x) =>
+      x().reset(0.1),
+    ),
+  );
+
+  yield* beginSlide("show all functions");
+
+  yield* all(
+    ...[valentineFunctionBox, birthdayFunctionBox].map((x) =>
+      x().showCode(0.5),
+    ),
+  );
+
+  yield* beginSlide("show generator functions");
+
+  const [p1, p2, p3, p4] = PEOPLE;
+  yield* all(
+    ...[valentineFunctionBox, birthdayFunctionBox].map((x) =>
+      x().hideCode(0.5),
+    ),
+  );
+  yield* all(
+    ...[valentineFunctionBox, birthdayFunctionBox].map((x) =>
+      x().setInputs([{ val: p2, node: <Person person={p2} /> }], 0.5),
+    ),
+  );
+
+  yield* beginSlide("show inputs");
+
+  yield* all(
+    ...[valentineFunctionBox, birthdayFunctionBox].map((x) =>
+      x().propogateInput(0.5),
+    ),
+  );
+  yield* all(
+    ...[valentineFunctionBox, birthdayFunctionBox].map((x) =>
+      x().propogateOutput(0.5),
+    ),
+  );
+  yield* beginSlide("make cards");
+
+  yield* all(
+    ...[valentineFunctionBox, birthdayFunctionBox].map((x) => x().reset(0.5)),
+    cardBuilderBox().showCode(0.5),
+  );
+
+  yield* beginSlide("hide cards, show card generator");
+
+  yield* cardBuilderBox().setInputs(
+    [
+      {
+        val: [p1, p2],
+        node: (
+          <Layout direction="row" gap={20}>
+            <Person person={p1} />
+            <Person person={p2} />
+          </Layout>
+        ),
+      },
+      { val: valentineCardFn, node: valentineFunctionBox() },
+    ],
+    0.5,
+  );
+  yield* beginSlide("input function to function");
+
+  yield* cardBuilderBox().hideCode(0.5);
+  yield* cardBuilderBox().propogateInput(0.5);
+  yield* cardBuilderBox().propogateOutput(0.5);
+
+  yield* beginSlide("build valentines cards");
+
+  yield* all(layout().gap(0, 0.5), cardBuilderBox().reset(0.5));
+  yield* cardBuilderBox().setInputs(
+    [
+      {
+        val: [p2, p3, p4],
+        node: (
+          <Layout direction="row" gap={20}>
+            <Person person={p2} />
+            <Person person={p3} />
+            <Person person={p4} />
+          </Layout>
+        ),
+      },
+      { val: birthdayCardFn, node: birthdayFunctionBox() },
+    ],
+    0.5,
+  );
+  yield* beginSlide("show birthday cards input");
+
+  yield* cardBuilderBox().propogateInput(0.5);
+  yield* cardBuilderBox().propogateOutput(0.5);
+
+  yield* beginSlide("build cards");
+});

src/scenes/index.ts

@@ -9,6 +9,7 @@ import pure_functions from "./pure_functions?scene";
 import valentines_letters from "./valentines_letters?scene";
 import birthday_letters from "./birthday_letters?scene";
 import sad_people from "./sad_people?scene";
+import generalized from "./generalized?scene";
 
 export const scenes = [
   //title,
@@ -20,6 +21,7 @@ export const scenes = [
   //hungry_partner,
   //pure_functions,
   //valentines_letters,
-  sad_people,
+  //sad_people,
-  birthday_letters,
+  //birthday_letters,
+  generalized,
 ];