Add empty lines for readability

Author: tshemsedinov

JavaScript/1-execute.js

@@ -5,6 +5,7 @@ class AccountCommand {
     this.account = account;
     this.amount = amount;
   }
+
   execute() {
     throw new Error('Command is not implemented');
   }
@@ -33,12 +34,14 @@ class Bank { // Invoker
   constructor() {
     this.commands = [];
   }
+
   operation(account, amount) {
     const Command = amount < 0 ? Withdraw : Income;
     const command = new Command(account, Math.abs(amount));
     command.execute();
     this.commands.push(command);
   }
+
   showOperations() {
     const output = [];
     for (const command of this.commands) {

JavaScript/2-undo.js

@@ -5,9 +5,11 @@ class AccountCommand {
     this.account = account;
     this.amount = amount;
   }
+
   execute() {
     throw new Error('Command.execute() is not implemented');
   }
+
   undo() {
     throw new Error('Command.undo() is not implemented');
   }
@@ -17,6 +19,7 @@ class Withdraw extends AccountCommand {
   execute() {
     this.account.balance -= this.amount;
   }
+
   undo() {
     this.account.balance += this.amount;
   }
@@ -26,6 +29,7 @@ class Income extends AccountCommand {
   execute() {
     this.account.balance += this.amount;
   }
+
   undo() {
     this.account.balance -= this.amount;
   }
@@ -42,18 +46,21 @@ class Bank {
   constructor() {
     this.commands = [];
   }
+
   operation(account, amount) {
     const Command = amount < 0 ? Withdraw : Income;
     const command = new Command(account, Math.abs(amount));
     command.execute();
     this.commands.push(command);
   }
+
   undo(count) {
     for (let i = 0; i < count; i++) {
       const command = this.commands.pop();
       command.undo();
     }
   }
+
   showOperations() {
     const output = [];
     for (const command of this.commands) {

JavaScript/3-anemic.js

@@ -19,6 +19,7 @@ class Bank {
   constructor() {
     this.commands = [];
   }
+
   operation(account, amount) {
     const operation = amount < 0 ? 'Withdraw' : 'Income';
     const command = new AccountCommand(
@@ -27,6 +28,7 @@ class Bank {
     this.commands.push(command);
     account.balance += amount;
   }
+
   showOperations() {
     console.table(this.commands);
   }

JavaScript/4-operations.js

@@ -38,6 +38,7 @@ class Bank {
   constructor() {
     this.commands = [];
   }
+
   operation(account, amount) {
     const operation = amount < 0 ? 'Withdraw' : 'Income';
     const execute = operations[operation];
@@ -55,6 +56,7 @@ class Bank {
     this.commands.push(command);
     execute(command);
   }
+
   showOperations() {
     console.table(this.commands);
   }

JavaScript/5-undo.js

@@ -14,6 +14,7 @@ class BankAccount {
     this.balance = 0;
     BankAccount.collection.set(name, this);
   }
+
   static find(name) {
     return BankAccount.collection.get(name);
   }
@@ -48,6 +49,7 @@ class Bank {
   constructor() {
     this.commands = [];
   }
+
   operation(account, amount) {
     const operation = amount < 0 ? 'Withdraw' : 'Income';
     const { execute } = operations[operation];
@@ -57,6 +59,7 @@ class Bank {
     this.commands.push(command);
     execute(command);
   }
+
   undo(count) {
     for (let i = 0; i < count; i++) {
       const command = this.commands.pop();
@@ -65,6 +68,7 @@ class Bank {
       undo(command);
     }
   }
+
   showOperations() {
     console.table(this.commands);
   }