Scala

Scala

ScalaTest's info function can be used to print output for visibility within unit tests, unlike println or System.err.println. [ more ]

Use %% for Scala-specific libraries and % for other JVM dependencies in SBT build.sbt files for Scala projects. [ more ]

To get the current date in Java, use LocalDate.now() with Java 8 and newer versions. [ more ]

RabbitMQ is an open-source message broker facilitating asynchronous communication through AMQP protocol. [ more ]

Java applications can read text files from their own JAR files using InputStream and BufferedReader.

Using getResourceAsStream method without a path before the filename reads files from the current directory within a JAR. [ more ]

Opaque types in Scala 3 offer encapsulation, type safety, abstraction, and semantic clarity.

They help create new data types with controlled access to representation, suitable for scenarios needing clear interfaces and meaningful names. [ more ]

Understanding 'type mismatch' error in Scala - mismatch between expected and actual data types.

Resolving 'type mismatch' by correcting data type or using type casting. [ more ]

You can use the spark-bigquery connector to read data from BigQuery tables directly into Spark DataFrames.

It is essential to set GCP credentials, specify the table path correctly, and include necessary dependencies to connect with BigQuery. [ more ]

ScalaJ-HTTP provides examples for handling redirect requests, making GET requests, setting timeout values, and performing POST requests.

Examples include handling redirect requests, following HTTP redirects, making GET requests, setting timeout values, and performing multipart POST requests. [ more ]

Monads simplify creating thread-safe primitives for any type without boilerplate.

Type classes enable working with different types like Integer or String for thread-safe operations. [ more ]

Using a JTextArea inside a JScrollPane to display a long text in a JOptionPane showMessageDialog.

Creating a scrolling text area in a JOptionPane showMessageDialog to handle large text messages effectively. [ more ]

Ducktape is an automatic and customizable compile-time transformation tool for case classes and sealed traits/enums in Scala.

The name 'ducktape' signifies its potential to generate glue code, despite being originally intended as 'ducttape'. [ more ]

Scala threads are created similarly to Java threads with slight syntax differences.

Java Runnable can be used in Scala to create threads by implementing the run method. [ more ]

AWS Glue is highly scalable, cost-effective, and integrates well with other AWS services for orchestrating complex pipelines.

Performance issues exist in AWS Glue when dealing with large Python-based Pyspark jobs due to expensive data shuffling between JVM and Python processes. [ more ]

Number of endpoints accessing applications doubled in 5 years

Cloud architecture ill-suited to handle increasing number of endpoints [ more ]

Using threads with a Handler in Android for asynchronous operations.

Updating UI elements like TextView with current date and time using a separate thread. [ more ]

The key to using sortedWith in Kotlin is understanding how to write a comparator with anonymous functions (lambda)

Kotlin sortedWith can be used to sort both integers and strings based on different criteria. [ more ]

Scala is a high-level language combining object-oriented and functional programming on JVM.

Scala scripting enables automation, data processing, and web applications with concise and scalable code. [ more ]

Validation of skills in Apache Spark & Scala is crucial for professionals.

Exam covers Apache Spark & Scala concepts, hands-on coding, and real-world problem-solving. [ more ]

The article provides a simple ZIO HTTP server application example.

Instructions on setting up the ZIO dependencies and running the application were shared. [ more ]

Understanding the history and recent changes of a product can aid in troubleshooting memory leaks effectively.

Identifying memory leaks may require trying various approaches, as there is no universal solution. [ more ]

Pattern matching in Scala allows for matching data structures like case classes and lists.

Sealed types in Scala are used for exhaustive pattern matching and restricting subclasses. [ more ]

Using mkString method of Array class can convert Scala sequence (like Array, List, Seq) to a String.

mkString function can be customized with any separator string to format the output as desired. [ more ]

Scala REPL under MS Windows faced issues with JLine library.

Proposal for a swing-based REPL in Scala for improved functionality. [ more ]

Java stack holds local variables and partial results, while Java heap is where memory for class instances and arrays is allocated. [ more ]

Scala helped SwissBorg beat the average by leveraging its expressiveness and ecosystem.

Scala's scalability, coupled with partnerships with Scala-specialized companies, supported SwissBorg's growth. [ more ]

Finding the longest string in a Java String array can be achieved by iterating through the array and comparing string lengths.

Knowing the length of the longest string in a Java String array can be useful for tasks like setting prototype values. [ more ]

Declaring a Java String array with an initial size

Declare a Java String array with no initial size [ more ]

Understanding Java Platform Module System is crucial for resolving 'java.lang.IllegalAccessError' errors.

Using --add-exports and --add-opens flags can help grant necessary access in Java 17 upgrade. [ more ]

Diverse range of Scala conferences in April 2024

Opportunities for learning and networking in Frontend Development and Software Architecture [ more ]

Scala developers commonly handle currency using the BigDecimal class.

Joda Money is a promising currency library for Scala development. [ more ]

Start the Mill REPL in the root directory of a Scala project by using the mill command. Choose a specific main method to run interactively within the REPL by specifying the class and package names. [ more ]

To run a Scala script as a Unix/Linux shell script, use a special syntax in the script file.

The 'exec' command in the shell script uses $0 to refer to the script file and $@ to refer to positional parameters. [ more ]

Use List.of() in Java 9 for initializing a static List efficiently.

Static List initialization pre-Java 9 can be efficiently done using Arrays.asList() with ArrayList. [ more ]

Java 22 designed for faster innovation in Java-based applications

New Java capabilities like Project Amber, Loom, Panama aim to improve Java development [ more ]

You can use the startsWith method on a String to match multiple patterns in a Scala match expression.

The example provided demonstrates how to use startsWith in a Scala match expression to generate different outputs based on the starting patterns of the input. [ more ]

Scala varargs syntax allows defining functions with a variable number of arguments using * symbol after parameter type declaration.

Scala varargs array is created within the function when using the varargs syntax. [ more ]