rjz · October 9, 2018 04:13 · Oct 9, 2018
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1 @@
+*.js
diff --git a/README.md b/README.md
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+# TypeScript samples
+
+Build with:
+
+	  $ tsc *.ts
diff --git a/generics.ts b/generics.ts
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+interface Bounds {
+  readonly w: number,
+  readonly h: number,
+  area(): number,
+}
+
+type Circle = Bounds & {
+  readonly r: number,
+}
+
+function circle (r: number) {
+  const area = () => Math.PI * r * r;
+  return { r, h: r + r, w: r + r, area };
+}
+
+const mapper = <T, U>(f: (t: T) => U) =>
+  (ts: T[]) => ts.map(f);
+
+const circleMapper = mapper<number, Circle>(circle);
+
+const circles = circleMapper([1, 2, 3]);
+
diff --git a/interface.ts b/interface.ts
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+interface Bounds {
+  readonly w: number, // width
+  readonly h: number, // height
+  area(): number,
+}
+
+function square (w: number, h: number) {
+  const area = () => w * h;
+  return { h, w, area };
+}
+
+function perimeter (b: Bounds) {
+  return 2 * (b.w + b.h);
+}
+
+console.log(perimeter(square(2, 4)));
diff --git a/point.ts b/point.ts
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+type Point = {
+  x: number,
+  y: number,
+};
+
+const add =
+  (p1: Point, p2: Point): Point => ({
+    x: p1.x + p2.x,
+    y: p1.y + p2.y,
+  });
+
+const p: Point = { x: 1, y: 1 };
+const o: Point = { x: 2, y: 3 };
+
+console.log(add(p, o));
+
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