Node.js MySQL Insert Example
In this post we'll see examples of inserting records into table using Node.js and MySQL. We'll be using the Promise Based API provided by MySQL2 library and a connection pool to connect to database in...
View ArticleNode.js MySQL Select Statement Example
In this post we'll see examples of Select statement using Node.js and MySQL to fetch data from DB. We'll be using the Promise Based API provided by MySQL2 library and a connection pool to connect to...
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Java Exchanger With Examples
Exchanger in Java is one of the Synchronization class added along with other synchronization classes like CyclicBarrier, CountDownLatch, Semaphore and Phaser in java.util.concurrent package. How does...
View ArticleJava Semaphore With Examples
Semaphore is one of the synchronization aid provided by Java concurrency util in Java 5 along with other synchronization aids like CountDownLatch, CyclicBarrier, Phaser and Exchanger.The Semaphore...
View ArticleCount Number of Words in a String Java Program
Write a Java program to count the number of words in a String is asked quite frequently in Java interviews. To test the logical thinking of the candidates it is often asked to write this program...
View ArticleCreating Custom Exception Class in Java
In this post we'll see how to create a custom exception in Java.custom exception in JavaThough Java's exception handling covers the whole gamut of errors and most of the time it is recommended that you...
View ArticleConvert String to Byte Array Java Program
In this post we'll see a Java program to convert a String to byte array and byte array to String in Java.Table of contentsConverting String to byte[] in JavaConversion of string to byte array with...
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Node.js MySQL Update Example
In the post Node.js MySQL Insert Example we have seen how to do an insert in MySQL DB from Node.js application. In this post we'll see examples of updating records in a table using Node.js and MySQL....
View ArticleNode.js MySQL Delete Example
In the post Node.js MySQL Update Example we saw examples of updating records in a table using Node.js and MySQL. In this post we'll see examples of deleting records from table using Node.js and MySQL....
View ArticleHow to Read File From The Last Line in Java
There are applications where you have to read huge files line by line may be using some tool like Pentaho, Camel. Let's say these files are in the format header, records and footer and you need to...
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Angular Access Control CanActivate Route Guard Example
In your Angular application you may need to control access to different parts of your app. To control that kind of authorization and authentication you can use route guards in Angular. Using route...
View ArticleResultSet Interface in Java-JDBC
java.sql.ResultSet interface in JDBC API represents the storage for the data you get by executing a SQL statement that queries the database.A ResultSet object maintains a cursor pointing at the result...
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Types of JDBC Drivers
JDBC API standardizes the way any Java application connects to DB. JDBC API is a collection of interfaces and JDBC drivers implement these interfaces in the JDBC API enabling a Java application to...
View ArticleStatement Interface in Java-JDBC
In the post Java JDBC Steps to Connect to DB we have already seen a complete example using the interfaces Driver, Connection, Statement and ResultSet provided by the JDBC API. In this post we’ll see...
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Spring MVC Checkbox And Checkboxes Form Tag Example
In this post we’ll see how to use checkbox and checkboxes provided by the form tag in the Spring MVC framework.Technologies usedFollowing is the list of tools used for the Spring MVC checkbox and...
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Spring MVC Radiobutton And Radiobuttons Form Tag Example
In this post we’ll see how to use radiobutton and radiobuttons tag provided by the form tag library in the Spring MVC framework.Spring MVC Project structure using MavenPlease refer Spring Web MVC...
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Creating a Maven Project in Eclipse
This tutorial shows how to create a Maven project in Eclipse. Here I am using the maven Eclipse plugin. These days Eclipse comes pre-configured with maven plugin and you don't need to download and set...
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Spring MVC Configuring Multiple View Resolvers Example
In this post we’ll see how to configure multiple view resolvers with in Spring MVC application. In Spring MVC view resolver is used to resolve the view name without actually hardcoding the view file....
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Spring MVC Dropdown Example Using Select, Option And Options Tag
In this post we’ll see how to show dropdown box in a Spring MVC application using select, option and options tag provided by the form tag library in the Spring MVC framework.Spring MVC Project...
View ArticleJava Stream - min() With Examples
In Java Stream API there is a min() method that is used to get the minimum element of this stream according to the provided Comparator. In this post we’ll see some examples of the min() method.Syntax...
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Spring MVC @RequestParam Annotation Example
In this Spring MVC @RequestParam annotation example we’ll see how request data which is passed as query parameter in the URI can be extracted using @RequestParam annotation. Spring @RequestParam and...
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Spring Boot Microservice + API Gateway + OAuth2 + Keycloak Server
In this tutorial we'll see how to secure your Spring Boot microservices using Keycloak as Identity and access management server, OUTH2 for authorization and OpenID Connect which verifies the identity...
View ArticleList Comprehension in Python With Examples
List comprehension in Python is a simple way to create a List from an iterable, it consists of an expression, a loop, an iterable that is iterated using the loop and an optional condition enclosed in a...
View ArticleDictionary in Python With Examples
Dictionary in Python is a built-in data type that is used to store elements in the form of key:value pairs. Value is said to be mapped with the key and you can extract the value by passing the mapped...
View ArticleHow to Iterate Dictionary in Python
In this tutorial we'll see how you can iterate or loop over a dictionary in Python. Some of the options are:Iterate dictionary directlyIterate a dictionary using keys methodIterate a dictionary using...
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