Enhance Your Understanding with Scala Programming Concept Cards for quick learning
A general-purpose programming language that combines object-oriented and functional programming concepts. It runs on the Java Virtual Machine (JVM) and provides powerful features for building scalable applications.
A variable whose value cannot be changed once assigned. In Scala, you can declare an immutable variable using the 'val' keyword.
A variable whose value can be changed after assignment. In Scala, you can declare a mutable variable using the 'var' keyword.
A feature in Scala that allows you to embed expressions within string literals. It simplifies string concatenation and formatting.
A powerful feature in Scala that allows you to match values against patterns. It is often used for control flow, extracting data from complex structures, and implementing algorithms.
A control structure in Scala that allows you to execute different blocks of code based on a condition. It follows the syntax 'if (condition) { code } else { code }'.
A control structure in Scala used for iterating over a collection of elements. It follows the syntax 'for (element <- collection) { code }'.
A control structure in Scala used for executing a block of code repeatedly as long as a condition is true. It follows the syntax 'while (condition) { code }'.
A reusable block of code that performs a specific task. In Scala, functions are first-class citizens, which means they can be assigned to variables, passed as arguments, and returned as results.
A function that takes one or more functions as arguments or returns a function as a result. It enables functional programming paradigms such as function composition and currying.
An ordered collection of elements in Scala. It is immutable by default and supports various operations like appending, prepending, and accessing elements.
A collection of unique elements in Scala. It does not preserve the order of elements and provides efficient membership tests.
A collection of key-value pairs in Scala. It allows you to associate values with unique keys and provides efficient lookup and update operations.
A blueprint for creating objects in Scala. It defines the properties and behavior that objects of the class will have.
A singleton instance of a class in Scala. It is used to hold utility methods, constants, or serve as an entry point for a Scala application.
A reusable component in Scala that defines a set of methods and fields. It can be mixed into classes to provide additional behavior.
A mechanism in Scala for dealing with runtime errors and abnormal conditions. It involves catching and handling exceptions using try-catch blocks.
The ability of a program to execute multiple tasks concurrently. Scala provides various concurrency models and libraries for writing concurrent programs.
A lightweight unit of execution in a program. Scala provides a Thread class for creating and managing threads.
A placeholder for a value that may not be available yet. It represents the result of an asynchronous computation and allows you to perform operations on the result when it becomes available.
The process of reading from and writing to files. Scala provides classes and methods for performing file handling operations.
The process of verifying the correctness and quality of software. Scala provides testing frameworks like ScalaTest and specs2 for writing and executing tests.
The process of finding and fixing defects in software. Scala provides debugging tools and techniques for identifying and resolving issues in code.
A programming technique where a function calls itself to solve a problem. It is often used for solving problems that can be divided into smaller subproblems.
A method that takes one or more functions as arguments or returns a function as a result. It enables functional programming paradigms and allows for code reuse.
A concise way to define anonymous functions in Scala. It allows you to write functions without explicitly declaring a method or function.
A feature in Scala that allows the compiler to deduce the type of a variable or expression based on its usage. It reduces the need for explicit type annotations.
A container type in Scala that represents an optional value. It can either be Some(value) if a value is present or None if no value is present.
A feature in Scala pattern matching that allows you to add additional conditions to patterns. It enables more precise matching and filtering of values.
A function that is not defined for all possible input values. It is often used in pattern matching to handle specific cases and provide fallback behavior.
A strategy in Scala where expressions are evaluated only when their values are needed. It improves performance by avoiding unnecessary computations.
A technique in functional programming where a function with multiple arguments is transformed into a sequence of functions, each taking a single argument. It enables partial application and function composition.
A placeholder for a type that is specified when using a generic class or method. It allows for writing reusable code that can work with different types.
A collection in Scala that cannot be modified after creation. It ensures thread safety and avoids unexpected changes to data.
A collection in Scala that can be modified after creation. It provides flexibility but requires careful handling to avoid data inconsistencies.
A type constructor that takes one or more type parameters. It allows for abstracting over types and building generic abstractions.
A design pattern in Scala that allows you to define behaviors for types independently of their hierarchy. It enables ad-hoc polymorphism and extensibility.
A mechanism in Scala that allows the compiler to automatically convert one type to another. It is often used for providing syntactic sugar and enhancing interoperability.
A form of recursion where the recursive call is the last operation performed in a function. It allows for efficient execution and avoids stack overflow errors.
A process in Scala where type information is removed at runtime. It is a limitation of the JVM and affects the usage of generics and type parameters.
A type that takes one or more types as parameters or returns a type as a result. It enables building generic abstractions and composing types.
A technique in Scala where a value is computed only when it is accessed for the first time. It improves performance by deferring expensive computations.
A way to create a new name for an existing type in Scala. It improves code readability and provides semantic meaning to types.
Constraints on type parameters in Scala that specify the upper or lower limit of acceptable types. It allows for writing more generic and reusable code.
A property of types in Scala that determines how subtyping relationships are preserved in generic types. It ensures type safety and compatibility.
A mechanism in Scala that allows you to retrieve type information at runtime. It is often used for implementing generic algorithms and serialization.
A function that takes one or more types as parameters and returns a new type. It allows for building generic abstractions and working with higher-kinded types.
A way to refer to a nested type or member of a generic type in Scala. It allows for accessing specific parts of a generic type.