From 3c411f25b9a60d4633fa283a076a1cc141eb9902 Mon Sep 17 00:00:00 2001
From: abux <abuxtmk1@gmail.com>
Date: Mon, 3 Aug 2026 22:07:47 +0100
Subject: [PATCH] Added... len... Yes

---
 src/fixed_slot_map.zig | 12 ++++++++++--
 src/keyed_slot_map.zig | 12 ++++++++++--
 src/slot_map.zig       | 12 ++++++++++--
 3 files changed, 30 insertions(+), 6 deletions(-)

diff --git a/src/fixed_slot_map.zig b/src/fixed_slot_map.zig
index ed6bbc1..390229f 100644
--- a/src/fixed_slot_map.zig
+++ b/src/fixed_slot_map.zig
@@ -96,11 +96,11 @@ pub fn FixedSlotMap(
         /// Skips slots that live on the free list ( `󰮢` tombstones `󰮢` )
         /// ----------------------------------------------------
         fn nextLive(
-            len: usize,
+            n: usize,
             free_list: []const u32,
             index: *usize,
         ) ?usize {
-            while (index.* < len) : (index.* += 1) {
+            while (index.* < n) : (index.* += 1) {
                 if (std.mem.indexOfScalar(u32, free_list, @intCast(index.*)) == null) {
                     const i = index.*;
                     index.* += 1;
@@ -207,6 +207,14 @@ pub fn FixedSlotMap(
             return self.get(handle) != null;
         }
 
+        /// ----------------------------------------------------
+        /// Number of live entries
+        /// Removed (freed) slots are not counted
+        /// ----------------------------------------------------
+        pub fn len(self: *Self) usize {
+            return self.values.items().len - self.free_list.items().len;
+        }
+
         /// ----------------------------------------------------
         /// ----------------------------------------------------
         pub fn iterator(self: *Self) Iterator {
diff --git a/src/keyed_slot_map.zig b/src/keyed_slot_map.zig
index 343e152..a24d81c 100644
--- a/src/keyed_slot_map.zig
+++ b/src/keyed_slot_map.zig
@@ -116,11 +116,11 @@ pub fn KeyedSlotMap(
         /// Skips slots that live on the free list ( `󰮢` tombstones `󰮢` rip-bozo 😭 )
         /// ----------------------------------------------------
         fn nextLive(
-            len: usize,
+            n: usize,
             free_list: []const u32,
             index: *usize,
         ) ?usize {
-            while (index.* < len) : (index.* += 1) {
+            while (index.* < n) : (index.* += 1) {
                 if (std.mem.indexOfScalar(u32, free_list, @intCast(index.*)) == null) {
                     const i = index.*;
                     index.* += 1;
@@ -267,6 +267,14 @@ pub fn KeyedSlotMap(
             return @intCast(self.lookup.count());
         }
 
+        /// ----------------------------------------------------
+        /// Number of live entries
+        /// Removed (freed) slots are not counted
+        /// ----------------------------------------------------
+        pub fn len(self: *const Self) usize {
+            return self.slot_map.values.items.len - self.slot_map.free_list.items.len;
+        }
+
         /// ----------------------------------------------------
         /// ----------------------------------------------------
         pub fn iterator(self: *Self) Iterator {
diff --git a/src/slot_map.zig b/src/slot_map.zig
index f7570e0..b23e972 100644
--- a/src/slot_map.zig
+++ b/src/slot_map.zig
@@ -90,11 +90,11 @@ pub fn SlotMap(comptime T: type) type {
         /// Skips slots that live on the free list ( `󰮢` tombstones `󰮢` )
         /// ----------------------------------------------------
         fn nextLive(
-            len: usize,
+            n: usize,
             free_list: []const u32,
             index: *usize,
         ) ?usize {
-            while (index.* < len) : (index.* += 1) {
+            while (index.* < n) : (index.* += 1) {
                 if (std.mem.indexOfScalar(u32, free_list, @intCast(index.*)) == null) {
                     const i = index.*;
                     index.* += 1;
@@ -207,6 +207,14 @@ pub fn SlotMap(comptime T: type) type {
             return self.get(handle) != null;
         }
 
+        /// ----------------------------------------------------
+        /// Number of live entries
+        /// Removed (freed) slots are not counted
+        /// ----------------------------------------------------
+        pub fn len(self: *const Self) usize {
+            return self.values.items.len - self.free_list.items.len;
+        }
+
         /// ----------------------------------------------------
         /// ----------------------------------------------------
         pub fn iterator(self: *Self) Iterator {