DRAFT: implement sequence

src/sequence/dropUntil.ts

@@ -0,0 +1,12 @@
+export function* dropUntil<T>(value: Iterable<T>, predicate: (it: T) => boolean): Iterable<T> {
+    const iterator = value[Symbol.iterator]();
+    let {value: it, done} = iterator.next();
+    while (!done) {
+        if (predicate(it)) break;
+        ({value: it, done} = iterator.next());
+    }
+    while (!done) {
+        yield it;
+        ({value: it, done} = iterator.next());
+    }
+}