From abf7abf3ea66e2d5ad63588ef7d8005717bad5de Mon Sep 17 00:00:00 2001
From: onyx-and-iris <code@onyxandiris.online>
Date: Thu, 19 Dec 2024 20:32:42 +0000
Subject: [PATCH] add {heap}.IsEmpty() and use it to empty the block during
 write()

---
 day-09/internal/two/disk.go | 2 +-
 day-09/internal/two/heap.go | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/day-09/internal/two/disk.go b/day-09/internal/two/disk.go
index 1c52ac8..037b8e1 100644
--- a/day-09/internal/two/disk.go
+++ b/day-09/internal/two/disk.go
@@ -124,7 +124,7 @@ func (d *disk) write() {
 	allBlocks = append(allBlocks, d.fileblocks...)
 
 	for i := 0; i < numEmptyBlocks; i++ {
-		for range d.emptyblocks[i].Len() {
+		for !d.emptyblocks[i].IsEmpty() {
 			allBlocks = append(allBlocks, heap.Pop(&d.emptyblocks[i]).(*block))
 		}
 	}
diff --git a/day-09/internal/two/heap.go b/day-09/internal/two/heap.go
index db5cba8..6e68e37 100644
--- a/day-09/internal/two/heap.go
+++ b/day-09/internal/two/heap.go
@@ -25,3 +25,7 @@ func (h *minHeap) Pop() interface{} {
 	*h = old[:n-1]
 	return x
 }
+
+func (h *minHeap) IsEmpty() bool {
+	return h.Len() == 0
+}