Convert UTF-8 Char Array to Raw Byte Array in Java
Given a UTF-8 Char Array, we can use the following Java Function to Convert to Raw Byte Array. Each UTF-8 Character has 3 types: 3 bytes, 2 bytes or …
Teaching Kids Programming – Determine a Armstrong Number
Teaching Kids Programming: Videos on Data Structures and Algorithms Given an integer n, return true if and only if it is an Armstrong number. The k-digit number n is …
GoLang: Command Line Tool to Sort Strings
We can sort a list of given strings from stdin and output to stdout using the following GoLang: package main import ( "fmt" "bufio" "os" "sort" "strings" ) func …
Teaching Kids Programming – First Unique Character in a String
Teaching Kids Programming: Videos on Data Structures and Algorithms Given a string s, return the first non-repeating character in it and return its index. If it does not exist, …
A Pseudo Random Generator in Java to Shuffle an Array/List
Sometimes, we need to shuffle an array or list in Java – but we want to get the same “random” output for the same input. The following is a …
Java Program to Print All Local IP Addresses
We can use the following Java command line program to print all loacal IP addresses of the computer. We iterate over all Net-Interfaces and get Inet Addresses. package com.helloacm; …