Update Exceptions Topic

Author: LeonnardoVerol

docs/programming-languages/exceptions/_cpp.mdx

@@ -28,7 +28,16 @@ catch (...) // catch-all handler (Yes, ellipses)
 // Custom Exception
 // ------------------------------------
 
-// TODO
+class MyException : public std::exception
+{
+public:
+	const char* what() const noexcept override
+	{
+		return "Something went wrong";
+	}
+};
+
+throw MyException();
 ```
 > More Info:
 > - https://www.learncpp.com/cpp-tutorial/144-uncaught-exceptions-catch-all-handlers-and-exception-specifiers/

docs/programming-languages/exceptions/_csharp.mdx

@@ -31,7 +31,22 @@ finally // Optional
 // Custom Exception
 // ------------------------------------
 
-// TODO
+public class MyException : Exception
+{
+	public MyException()
+	{
+	}
+
+	public MyException(string message) : base(message)
+	{
+	}
+
+	public MyException(string message, Exception innerException) : base(message, innerException)
+	{
+	}
+}
+
+throw new MyException("Something went wrong");
 ```
 
 > More Info:

docs/programming-languages/exceptions/_go.mdx

@@ -1,3 +1,19 @@
 ```Go
-// TODO
+// Go does not use exceptions.
+// Return errors as values.
+
+func divide(first int, second int) (int, error) {
+	if second == 0 {
+		return 0, errors.New("division by zero")
+	}
+
+	return first / second, nil
+}
+
+value, err := divide(10, 2)
+if err != nil {
+	return err
+}
+
+// panic/recover exists, but is usually reserved for unrecoverable errors.
 ```

docs/programming-languages/exceptions/_java.mdx

@@ -1,3 +1,28 @@
 ```Java
-// TODO
+// ------------------------------------
+// Handling Exceptions
+// ------------------------------------
+try {
+	// ...
+}
+catch (YourSpecificException error) {
+	// ...
+}
+catch (Exception error) {
+	// ...
+}
+finally {
+	// This block will run for success or catch
+}
+
+// ------------------------------------
+// Custom Exception
+// ------------------------------------
+class MyException extends Exception {
+	public MyException(String message) {
+		super(message);
+	}
+}
+
+throw new MyException("Something went wrong");
 ```

docs/programming-languages/exceptions/_javascript.mdx

@@ -32,7 +32,14 @@ finally {
 // Custom Exception
 // ------------------------------------
 
-// TODO
+class MyError extends Error {
+	constructor(message) {
+		super(message);
+		this.name = "MyError";
+	}
+}
+
+throw new MyError("Something went wrong");
 ```
 
 > More Info:

docs/programming-languages/exceptions/_python.mdx

@@ -41,7 +41,10 @@ def divide(x, y):
 # Custom Exception
 # ------------------------------------
 
-# TODO
+class MyError(Exception):
+	pass
+
+raise MyError("Something went wrong")
 ```
 
 > More Info:

docs/programming-languages/exceptions/_rust.mdx

@@ -1,3 +1,20 @@
 ```Rust
-// TODO
+// Rust does not use exceptions for recoverable errors.
+// Use Result<T, E>.
+
+fn divide(first: i32, second: i32) -> Result<i32, String> {
+	if second == 0 {
+		return Err(String::from("division by zero"));
+	}
+
+	Ok(first / second)
+}
+
+match divide(10, 2) {
+	Ok(value) => println!("{}", value),
+	Err(error) => println!("{}", error),
+}
+
+// Panic is available for unrecoverable errors.
+panic!("Something went wrong");
 ```

docs/programming-languages/exceptions/_typescript.mdx

@@ -33,7 +33,14 @@ finally {
 // Custom Exception
 // ------------------------------------
 
-// TODO
+class MyError extends Error {
+	public constructor(message: string) {
+		super(message);
+		this.name = "MyError";
+	}
+}
+
+throw new MyError("Something went wrong");
 ```
 > More Info:
 > - https://github.com/Microsoft/TypeScript/issues/20024