diff --git a/Chapter 03/Exercise 3.1 b/Chapter 03/Exercise_3.1.js similarity index 100% rename from Chapter 03/Exercise 3.1 rename to Chapter 03/Exercise_3.1.js diff --git a/Chapter 03/Exercise 3.2 b/Chapter 03/Exercise_3.2.js similarity index 100% rename from Chapter 03/Exercise 3.2 rename to Chapter 03/Exercise_3.2.js diff --git a/Chapter 03/Exercise 3.3 b/Chapter 03/Exercise_3.3.js similarity index 100% rename from Chapter 03/Exercise 3.3 rename to Chapter 03/Exercise_3.3.js diff --git a/Chapter 03/Exercise 3.4 b/Chapter 03/Exercise_3.4.js similarity index 100% rename from Chapter 03/Exercise 3.4 rename to Chapter 03/Exercise_3.4.js diff --git a/Chapter 03/Exercise 3.5 b/Chapter 03/Exercise_3.5.js similarity index 100% rename from Chapter 03/Exercise 3.5 rename to Chapter 03/Exercise_3.5.js diff --git a/Chapter 03/Project 1 b/Chapter 03/Project_1.js similarity index 100% rename from Chapter 03/Project 1 rename to Chapter 03/Project_1.js diff --git a/Chapter 03/Project 2 b/Chapter 03/Project_2.js similarity index 100% rename from Chapter 03/Project 2 rename to Chapter 03/Project_2.js diff --git a/Chapter 04/Exercise 4.1 b/Chapter 04/Exercise_4.1.js similarity index 100% rename from Chapter 04/Exercise 4.1 rename to Chapter 04/Exercise_4.1.js diff --git a/Chapter 04/Exercise 4.2 b/Chapter 04/Exercise_4.2.js similarity index 100% rename from Chapter 04/Exercise 4.2 rename to Chapter 04/Exercise_4.2.js diff --git a/Chapter 04/Exercise 4.3 b/Chapter 04/Exercise_4.3.js similarity index 100% rename from Chapter 04/Exercise 4.3 rename to Chapter 04/Exercise_4.3.js diff --git a/Chapter 04/Exercise 4.4 b/Chapter 04/Exercise_4.4.js similarity index 100% rename from Chapter 04/Exercise 4.4 rename to Chapter 04/Exercise_4.4.js diff --git a/Chapter 04/Exercise 4.5 b/Chapter 04/Exercise_4.5.js similarity index 100% rename from Chapter 04/Exercise 4.5 rename to Chapter 04/Exercise_4.5.js diff --git a/Chapter 04/Project 1 b/Chapter 04/Project_1.js similarity index 100% rename from Chapter 04/Project 1 rename to Chapter 04/Project_1.js diff --git a/Chapter 04/Project 2 b/Chapter 04/Project_2.js similarity index 100% rename from Chapter 04/Project 2 rename to Chapter 04/Project_2.js diff --git a/Chapter 04/Project 3 b/Chapter 04/Project_3.js similarity index 100% rename from Chapter 04/Project 3 rename to Chapter 04/Project_3.js