Implement sequence

src/sequence/dropUntil.ts

@@ -1,12 +1,11 @@
 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());
+    let next = iterator.next();
+    while (!next.done && !predicate(next.value)) {
+        next = iterator.next();
     }
-    while (!done) {
-        yield it;
-        ({value: it, done} = iterator.next());
+    while (!next.done) {
+        yield next.value;
+        next = iterator.next();
     }
 }