add some examples

Author: RobinMalfait

examples/001-alphabet.ts

@@ -0,0 +1,9 @@
+import { pipe, map, range } from '..';
+
+const alphabet = pipe(
+  range(0, 25),
+  map((x: number) => String.fromCharCode(x + 65)),
+  Array.from
+);
+
+alphabet(); // [ 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z' ]

examples/002-random-numbers.ts

@@ -0,0 +1,6 @@
+import { pipe, generate, take } from '..';
+
+const randomNumberGenerator = pipe(generate(Math.random), take(3), Array.from);
+
+randomNumberGenerator();
+// [ 0.973565686837264, 0.7129324120429745, 0.10387686881346947 ]

examples/003-fibonacci.ts

@@ -0,0 +1,21 @@
+import { pipe, generate, take } from '..';
+
+const fibonacci = pipe(
+  generate(
+    (function() {
+      let x = 1;
+      let y = 1;
+
+      return () => {
+        let previous = x;
+        x = y;
+        y += previous;
+        return previous;
+      };
+    })()
+  ),
+  take(10),
+  Array.from
+);
+
+fibonacci(); // [ 1, 1, 2, 3, 5, 8, 13, 21, 34, 55 ]

src/generator.test.ts

@@ -29,5 +29,5 @@ it('should be possible to create a fibonacci iterator', () => {
     take(10),
     Array.from
   );
-  expect(fibonacci(10)).toEqual([1, 1, 2, 3, 5, 8, 13, 21, 34, 55]);
+  expect(fibonacci()).toEqual([1, 1, 2, 3, 5, 8, 13, 21, 34, 55]);
 });