MithraTalluri

buildRectangle(title = "MyRectangle", width = 50)

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fun buildRectangle(title: String, height: Int = 100, width: Int = 100) {
    Rectangle(title, width, height)
}

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val str1: String = null  // compile time error
val str2: String? = null // compiles fine

val handler: EmailHandler? = null
handler.sendEmail()  // compile time error
handler?.sendEmail() // compiles fine but doesn't call sendEmail() function

MithraTalluri

data class Person(val name: String, val age: Int)

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public class Person {
    private final String name;
    private final int age;

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {

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fun String.lastChar() = get(length - 1) //returns the last char in a string
val lastChar: Char = "abcd".lastChar()  // d

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val john1 = Person("John")
val john2 = Person("John")
john1 == john2    // true  (structural equality)
john1 === john2   // false (referential equality)

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if (obj is String) {
    print(obj.length) // x is automatically cast to String
}

if (obj !is String) {
    print("Not a String")
}

MithraTalluri

val i = 1                             // type inferred to Int
val s = "abc"                         // type inferred to String

val j: Double = 1.1                   // type declared explicitly

MithraTalluri

int manachersAlgorithm(String s, int N) {
    String str = getModifiedString(s, N);
    int len = (2 * N) + 1;
    int[] P = new int[len];
    int c = 0; //stores the center of the longest palindromic substring until now
    int r = 0; //stores the right boundary of the longest palindromic substring until now
    int maxLen = 0;
    for(int i = 0; i < len; i++) {
        //get mirror index of i
        int mirror = (2 * c) - i;