Fix JS examples

Author: tshemsedinov

JavaScript/2-undo.js

@@ -65,7 +65,7 @@ class Bank {
     const output = [];
     for (const command of this.commands) {
       output.push({
-        operation: command.constructor.name,
+        operation: command.constructor.name.toLowerCase(),
         account: command.account.name,
         amount: command.amount,
       });

JavaScript/3-anemic.js

@@ -21,7 +21,7 @@ class Bank {
   }
 
   operation(account, amount) {
-    const operation = amount < 0 ? 'Withdraw' : 'Income';
+    const operation = amount < 0 ? 'withdraw' : 'income';
     const command = new AccountCommand(
       operation,
       account.name,

JavaScript/4-operations.js

@@ -75,7 +75,7 @@ bank.operation(account1, 1000);
 bank.operation(account1, -50);
 const account2 = new BankAccount('Antoninus Pius');
 bank.operation(account2, 500);
-bank.operation(account2, -10000); // -10000
+bank.operation(account2, -100); // -10000
 bank.operation(account2, 150);
 bank.showOperations();
 console.table([account1, account2]);