pfes

pfes/sort/utils.ts

@@ -0,0 +1,23 @@
+export const to_int = (n: string) => ((parsed) => isNaN(parsed) ? 0 : parsed)(parseInt(n));
+
+export function range(from: number, to: number) {
+	function* gen() {
+		while (from < to) yield from++;
+	}
+	return iterable_to_arrayable(gen());
+}
+
+export function enumerate<T>(iterable: Iterable<T>) {
+	function* gen() {
+		let index = 0;
+		for (const item of iterable) yield [index++, item] as const;
+	}
+	return iterable_to_arrayable(gen());
+}
+
+function iterable_to_arrayable<T>(iterator: Iterable<T>) {
+	// deno-lint-ignore no-explicit-any
+	const anyfied = iterator as any;
+	anyfied.arr = () => Array.from(iterator);
+	return anyfied as Iterable<T> & { arr: () => T[] };
+}