Fix abstract class check

tshemsedinov · tshemsedinov · commit 24aeb2cff74c · 2020-02-07T04:16:56.000+02:00
diff --git a/JavaScript/1-file-storage.js b/JavaScript/1-file-storage.js
@@ -6,7 +6,7 @@ const readline = require('readline');
 class Database {
   constructor() {
     const proto = Object.getPrototypeOf(this);
-    if (proto === Database) {
+    if (proto.constructor === Database) {
       throw new Error('abstract class should not be instanciated');
     }
   }
@@ -19,7 +19,7 @@ class Database {
 class Cursor {
   constructor() {
     const proto = Object.getPrototypeOf(this);
-    if (proto === Cursor) {
+    if (proto.constructor === Cursor) {
       throw new Error('abstract class should not be instanciated');
     }
     this.current = 0;

Original file line number	Diff line number	Diff line change
`@@ -6,7 +6,7 @@ const readline = require('readline');`
`6`	`6`	`class Database {`
`7`	`7`	`constructor() {`
`8`	`8`	`const proto = Object.getPrototypeOf(this);`
`9`		`- if (proto === Database) {`
	`9`	`+ if (proto.constructor === Database) {`
`10`	`10`	`throw new Error('abstract class should not be instanciated');`
`11`	`11`	`}`
`12`	`12`	`}`
`@@ -19,7 +19,7 @@ class Database {`
`19`	`19`	`class Cursor {`
`20`	`20`	`constructor() {`
`21`	`21`	`const proto = Object.getPrototypeOf(this);`
`22`		`- if (proto === Cursor) {`
	`22`	`+ if (proto.constructor === Cursor) {`
`23`	`23`	`throw new Error('abstract class should not be instanciated');`
`24`	`24`	`}`
`25`	`25`	`this.current = 0;`