A common headache for JSP developers is debugging JSPs. The java community provides a lot of tools to debug java code. But there is no standard way to debug JSPs. The article describes how to debug JSPs in Tomcat 7.0.0 and later.. We would be using JSR-45 to debug JSPs. JSR-45 is supported by Tomcat 7.0.0 and later. JSR-45 is not supported by Tomcat 6.0.0 and earlier. We can download JSR-000045 ..

A monotonic stack is a stack that is always sorted in a monotonic way. The monotonic stack is a useful data structure for solving problems that require finding the next greater element or the next smaller element. Next Greater Element Given an array of integers, find the next greater element for each element in the array. The next greater element of an element x is the first greater element that..

This is a common error after updating MacOS. When this occurs IntelliJ will not be able to detect the current branch. And it might cancel updates to the index. Or General Git operations will fail. fasbhim  ~/Documents/../work/./current/./src/main/java/com/../../control/project  git branch --show-current xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing ..

A bitwise operation is an operation that operates on bits and performs bit-by-bit manipulation. The most Commonly used bitwise operations are: 1. AND : (a & b) 2. OR : (a | b) : 3. XOR : (a ^ b) : Exclusive OR 4. NOT : (~a) : Inverts all the bits 5. Left Shift : (a > b) :Mathematically, a >> b is equivalent to a / 2^b 2. Logical Right Shift : (a >>> b) :Mathematically, a >>> b is equivalent to a..

Singleton design pattern is one of the most used design patterns in Java. This type of design pattern comes under creational pattern as this pattern provides one of the best ways to create an object. This pattern involves a SINGLE CLASS which is responsible to create an object while making sure that ONLY SINGLE OBJECT gets created. This class provides a way to access its only object which can be..

Spring Mobile Device is a library that provides a simple way to detect the device type of the user. It is based on the user-agent string of the request. It is a part of the Spring Mobile project. Core Components of Spring Mobile Automatic Device Detection Spring Mobile Device provides automatic device detection. It detects the device type of the user based on the user-agent string of the request..

Jest is a JavaScript testing framework maintained by Facebook, Inc. Jest is well known for its speed, reliability, and ease of use. It works out of the box for most JavaScript projects. Jest is a complete and ready to set-up JavaScript testing solution. It lets you write tests with an approachable, familiar and feature-rich API that gives you results quickly. Jest is well-documented, requires li..

TreeMap is a sorted map implementation based on a red-black tree. The elements are sorted by their keys, which are inserted into the map using the put() method or can be specified in the constructor. The map is sorted according to the natural ordering of its keys, or by a Comparator provided at map creation time, depending on which constructor is used. So what is red-black tree? A red-black tree..

API Gateway throttling is a mechanism to control the number of requests that can be made to an API. This is useful to control the load on the backend service and to prevent abuse of the API. Throttling can be applied at the API level, resource level, or method level. Throttling can be applied to both the requests that are made to the API and the responses that are returned from the API. API Gate..

A zombie(defunct) process is a process that has completed execution but still has an entry in the process table. It is a process in a terminated state. It is also called a defunct process or a dead process. A zombie process remains in the process table until its parent process reads its exit status using the wait() system call. If the parent process does not read the exit status, the zombie proc..