Java Program to Find the First Non-repeated Character in a String

Write a java program to find the first non-repeated character in a string.Given an input string, we have to write a java code to find the first non-repeated character in a string.

For example –

i) Input string – java
Output – j (j is the first non-repeating character in a string)

ii) Input string – web rewrite
Output – b (b is the first non-repeating character in a string)

Abstract Class vs Interface in PHP

Abstract class vs interface in PHP. What’s the Difference between an abstract class and interface in PHP? It is one the most important oops concept asked in an interview.

In this tutorial, You are going to learn some important differences between an abstract class and interface.

Java program to check anagram : Check whether Two Strings are Anagrams of each other

Write a java program to check anagram. In this programming question, we are going to write a java code to check whether two strings are anagrams of each other.

Let’s first understand what is an anagram? and how we are going to solve this problem.

What is an Anagram?

Two strings are said to be anagrams of each other if it contains the same characters, only the order of characters in both the strings is different. In other words, both strings must contain the same exact letters in the same exact frequency.

How to Debug Sql Queries in Laravel

How to debug SQL queries in Laravel & Lumen. During development of an application, there may be times when we need to write large and complex queries. Laravel provides an awesome query builder and ORM (Eloquent) to do this task effortlessly. But sometimes we would like to see the actual SQL being generated.

How to Check if a Number is a Power of 2

How to check if a number is a power of 2.  To understand this question, let’s take some example.

Example –

Input – 16   – 16 is a power of 2 (2^4).

Input – 15 – 15 is not a power of 2.

Input – 32- 32 is a power of 2 (2^5).

We can use multiple approaches to check whether a number is a power of 2 or not.

Create Seo-Friendly URLs with htaccess – URL Rewriting

How to create SEO-Friendly URLs with htaccess . How to Rewrite dynamic URLs to SEO-Friendly URLs using htaccess . In this URL rewriting tutorial, You’ll learn htaccess directives through which you can rewrite existing dynamic URLs into more meaningful SEO-Friendly URLs.

Now you are thinking why we need to create SEO-friendly URLs, what’s their need. First, let’s  understand why  SEO-friendly URLs are important.