From 2ba6e0f8883dabeb1f31684f4f6743cbd3eb3d39 Mon Sep 17 00:00:00 2001
From: Gareth Jones <jones258@gmail.com>
Date: Sun, 7 Jul 2019 09:54:15 +1200
Subject: [PATCH] =?UTF-8?q?fix:=20=F0=9F=90=9B=20refactor=20`#write`=20to?=
 =?UTF-8?q?=20be=20compatible=20w/=20`strictNullChecks`?=
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---
 src/volume.ts | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/src/volume.ts b/src/volume.ts
index bedd9417..11ea97a7 100644
--- a/src/volume.ts
+++ b/src/volume.ts
@@ -1150,10 +1150,10 @@ export class Volume {
     validateFd(fd);
 
     let offset: number;
-    let length: number;
+    let length: number | undefined;
     let position: number;
-    let encoding: TEncoding;
-    let callback: (...args) => void;
+    let encoding: TEncoding | undefined;
+    let callback: ((...args) => void) | undefined;
 
     const tipa = typeof a;
     const tipb = typeof b;
@@ -1198,18 +1198,18 @@ export class Volume {
       length = buf.length;
     }
 
-    validateCallback(callback);
+    const cb = validateCallback(callback);
 
     setImmediate(() => {
       try {
         const bytes = this.writeBase(fd, buf, offset, length, position);
         if (tipa !== 'string') {
-          callback(null, bytes, buf);
+          cb(null, bytes, buf);
         } else {
-          callback(null, bytes, a);
+          cb(null, bytes, a);
         }
       } catch (err) {
-        callback(err);
+        cb(err);
       }
     });
   }