Add code comment to ease understanding

twoi · web-flow · commit 30ce2f00ab56 · 2019-08-18T07:54:29.000+09:00
As I'm [not the only one](VividCortex#70) who stumbled upon this, let's just add a comment to the example code. No logging library I have worked with goes as far as terminating the program, so many go beginners may not understand this - although I think it does make sense. (Otherwise - what's the meaning of "fatal"?)
diff --git a/retrieving.md b/retrieving.md
@@ -36,12 +36,14 @@ defer rows.Close()
 for rows.Next() {
 	err := rows.Scan(&amp;id, &amp;name)
 	if err != nil {
+		// log.Fatal will exit the program, preventing the deferred call to rows.Close()
 		log.Fatal(err)
 	}
 	log.Println(id, name)
 }
 err = rows.Err()
 if err != nil {
+	// log.Fatal will exit the program, preventing the deferred call to rows.Close()
 	log.Fatal(err)
 }
 </pre>

Original file line number	Diff line number	Diff line change
`@@ -36,12 +36,14 @@ defer rows.Close()`
`36`	`36`	`for rows.Next() {`
`37`	`37`	`err := rows.Scan(&id, &name)`
`38`	`38`	`if err != nil {`
	`39`	`+ // log.Fatal will exit the program, preventing the deferred call to rows.Close()`
`39`	`40`	`log.Fatal(err)`
`40`	`41`	`}`
`41`	`42`	`log.Println(id, name)`
`42`	`43`	`}`
`43`	`44`	`err = rows.Err()`
`44`	`45`	`if err != nil {`
	`46`	`+ // log.Fatal will exit the program, preventing the deferred call to rows.Close()`
`45`	`47`	`log.Fatal(err)`
`46`	`48`	`}`
`47`	`49`	`</pre>`