jsbonso

    /**
     * Reverses a string using StringBuilder.
     * You can replace it with a StringBuffer as well,
     * but in this case, you don't need it to be thread-safe, 
     * hence, a StringBuilder will do.
     * @param input
     * @return
     */
    static String reverseString(String input) {
    	return (new StringBuilder(input)).reverse().toString();

jsbonso

	/**
	 * A simple recursive method that outputs numbers from 1 - 10
	 * @param number of times the method will recurse / repeat
	 * @return
	 */
	static int recursiveMethod(int num) {
		// An important line, which defines the case when will the recursion ends
		if (num == 0)
			return num;
	

jsbonso

	/**
	 * Checks the primality of the given number. 
	 * Prime numbers can be used in password encryptions
	 * and cryptography.
	 * 
	 * Basically, a prime number is:
	 * 1. A whole number which is greater than 1 
	 * 2. And can only be divided evenly by 1 
	 *    and the number itself.
	 * 

jsbonso

	/**
	 * Simple blackjack method that: 
	 * 
	 * 1. Returns the input which is the nearest to number 21
	 * 2. Returns 0 if both numbers are over 21
	 * @author Jon Bonso
	 * @param a
	 * @param b
	 */
	static int blackjack(int a, int b) {

jsbonso

    /**
     * Check if the given input is a Palindrome
     * using a StringBuilder.
     * @author Jon Bonso
     * @param input
     * @return boolean
     */
    private static boolean isPalindrome(String input) {
    		return input.equals(new StringBuilder(input).reverse().toString());
    }

jsbonso

/**
* https://www.bloomberg.com/markets/watchlist/recent-ticker/GOOG:US
* https://www.bloomberg.com/markets/chart/data/1D/GOOG:US
*/

jsbonso

The What, When and Why of GraphQL


In our previous lecture, we had a good introduction of what GraphQL is
by looking at the common issues of a RESTful API,  and how GraphQL solves
 and improves
Those certain issues. 

This time, we will dive deeper on what GraphQL is, 
the story on how it came to be

jsbonso

-- Show all images
docker images -a

-- Show all containers
docker volume ls

-- Removes dangling/unused container
docker volume prune

-- Basically similar with (docker volume prune) command.

jsbonso

/* 
* Returns the number of arithmetic slices in 
* the given number array. 
* 
* Examples: 
* [-1, 1, 3, 3, 3, 2, 1, 0]  = 5 
* 
* A sequence is an Arithmetic if: 
*  1. It consists of 3 elements
*  2. The difference between any two consecutive

jsbonso

	/**
	 * Example of Java's Stream API - ForEach
	 * @author jonbonso
	 * @param args
	 */
	public static void main(String... args) {
		
		System.out.println("Iterate using the traditional for loop..."); 
		int[] numArray = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};