shruti-basil-hs

## Kotlin-adr-extension
text_foo.setText(“foo”);

## Java-FindViewById
textView  = (TextView) findViewById(R.id.text_foo);
textView.setText(“foo”);

## Extension-functions
View.visible() {
this.visibility = View.Visible
}

## with-example
val w = Window()
with(w) {
  setWidth(100)
  setHeight(200)
  setBackground(RED)
}

## with-func-definition
fun <T, R> with(receiver: T, f: T.() -> R): R = receiver.f()

## apply-example
Person(name).apply { foo() };

//Equivalent 4 line Java code
Person getFoo(String name) {
  Person person = new Person(name);
  person.foo();
  return person;
}

## apply-func-description
fun <T> T.apply(f: T.() -> Unit): T { f(); return this }

## let-example
Person.getName().let { name ->
  print(name)
}
// name is no longer visible here

## let-func-description
fun <T, R> T.let(f: (T) -> R): R = f(this)

## KotlinNullSafety
class Person(var name: String?) // the name property can be null
class Person(var name: String) // the name property cannot be null
	textView = (TextView) findViewById(R.id.text_foo);
	textView.setText(“foo”);
	val w = Window()
	with(w) {
	setWidth(100)
	setHeight(200)
	setBackground(RED)
	}
	Person(name).apply { foo() };

	//Equivalent 4 line Java code
	Person getFoo(String name) {
	Person person = new Person(name);
	person.foo();
	return person;
	}
	Person.getName().let { name ->
	print(name)
	}
	// name is no longer visible here
	class Person(var name: String?) // the name property can be null
	class Person(var name: String) // the name property cannot be null