Class Parameters

I’m on the AboutClasses koan.  So far Scala is holding up its end of the promise of terseness.  For example:

	class ClassWithVarParameter(var description: String)
	// Which is equivalent to the following in Java:
	//
	// public class ClassWithVarParameter() {
	//
	// private String description;
	//
	// public ClassWithVarParameter(String description) {
	// this.description = description;
	// }
	//
	// public String description() {
	// return description;
	// }
	//
	// public void description(String description) {
	// this.description = description;
	// }
	// }

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and the immutable equivalent:

	class ClassWithValParameter(val name: String)
	// Which is equivalent to the following in Java:
	//
	// public class ClassWithValParameter() {
	//
	// private String description;
	//
	// public ClassWithVarParameter(String description) {
	// this.description = description;
	// }
	//
	// public String description() {
	// return description;
	// }
	// }

view raw AboutClasses.scala hosted with ❤ by GitHub

and if you simply want a private field:

	val aClass = new ClassWithPrivateFields("name")
	// NOTE: aClass.name is not accessible
	// Which is equivalent to the following in Java:
	//
	// public class ClassWithValParameter() {
	//
	// private String description;
	//
	// public ClassWithVarParameter(String description) {
	// this.description = description;
	// }
	// }

view raw AboutClasses.scala hosted with ❤ by GitHub

So far, so impressed.