doc: add explicit declaration of fd with null val

Gena888 · mcollina · commit 069d2bd2507b · 2021-12-04T17:29:21.000+01:00
In example of implementing a writable stream with extending on Writable add explicit declaration of 'fd' (file descriptor) variable with null value. It will make this example more similar to readable stream's one. And will make it easier to figure out in topic. PR-URL: #40704 Reviewed-By: Tobias Nießen <tniessen@tnie.de> Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: Minwoo Jung <nodecorelab@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
diff --git a/doc/api/stream.md b/doc/api/stream.md
@@ -2612,6 +2612,7 @@ class WriteStream extends Writable {
   constructor(filename) {
     super();
     this.filename = filename;
+    this.fd = null;
   }
   _construct(callback) {
     fs.open(this.filename, (err, fd) => {

Original file line number	Diff line number	Diff line change
`@@ -2612,6 +2612,7 @@ class WriteStream extends Writable {`
`2612`	`2612`	`constructor(filename) {`
`2613`	`2613`	`super();`
`2614`	`2614`	`this.filename = filename;`
	`2615`	`+ this.fd = null;`
`2615`	`2616`	`}`
`2616`	`2617`	`_construct(callback) {`
`2617`	`2618`	`fs.open(this.filename, (err, fd) => {`