Declarative programming emphasizes the 'what' over the 'how' in coding, focusing on desired outcomes rather than procedural steps. It utilizes higher-order functions, immutable data, and pure functions to enhance code readability and maintainability. This paradigm is exemplified in languages such as SQL for databases, HTML for web content, and CSS for styling, as well as functional languages like Haskell and Lisp. The approach aids in creating modular, scalable, and error-resistant software, with advantages in parallel computing.
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Declarative programming focuses on expressing desired results rather than the steps to achieve them
Higher-Order Functions
Declarative programming often involves the use of higher-order functions to articulate the intent of the code at a higher level of abstraction
Immutable Data Structures
Declarative programming utilizes immutable data structures to avoid side effects and mutable state
Domain-Specific Languages
Declarative programming may use domain-specific languages to express the logic of computation
Declarative programming offers improved code readability, maintainability, and scalability
Declarations in programming define the properties and expected behavior of elements without specifying implementation details
Separating domain logic from control flow is fundamental in declarative programming
SQL, HTML, and CSS are examples of declarative languages used for database queries, web content, and web page presentation, respectively
Declarative programming advocates for separating domain logic from control flow, prioritizing code readability, and minimizing mutable state and side effects
Recursion
Recursion is a fundamental construct in declarative programming for problem-solving
Pattern Matching
Pattern matching is another fundamental construct used in declarative programming
Declarative programming offers advantages such as improved code readability, maintainability, and potential for parallel execution
Transitioning from imperative to declarative programming requires a shift in mindset from focusing on control flow to expressing computations in terms of desired outcomes
Familiarizing oneself with declarative languages, embracing functional programming concepts, and practicing articulating problems in a declarative manner can aid in transitioning to declarative programming
Refactoring existing imperative code to a declarative style can also help in transitioning to declarative programming