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World Congress 2022 • Jun 15, 2022

A Guide To Functional Programming

Jemima Abu

Tired of erratic JavaScript bugs caused by volatile state? Discover how functional programming uses pure functions and immutability to create highly readable, bulletproof architecture.

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#1 about 3 min

Defining the core principles of functional programming

Implementing functional architecture relies on predictable outputs, immutable values, and minimizing execution side effects within code.

#2 about 2 min

Benefits of writing encapsulated functional code

Adopting single-responsibility execution patterns reduces bug frequency while streamlining testability and component reusability.

#3 about 3 min

Replacing class components with functional programming constructs

Migrating away from class-bound context references prevents state duplication errors while visually organizing application routing logic.

#4 about 4 min

Identifying pure and impure functions in JavaScript

Coupling execution outcomes exclusively to passed variables eliminates the unpredictability of referencing external global states.

#5 about 2 min

Preserving immutable values using JavaScript spread operators

Duplicating structures via spread syntax prevents variable assignment errors when transforming default core language arrays.

#6 about 2 min

Applying higher-order functions to prevent data mutation

Passing execution logic as arguments to built-in iterators safely transforms data collections without affecting source variables.

#7 about 1 min

Avoiding unintended execution side effects in functions

Removing anomalous behaviors like arbitrary terminal logging guarantees predictable outcomes for deterministic application architectures.

#8 about 2 min

Real-world implementations of functional design architectures

Expanding atomic interface components and strictly enforcing reducer states demonstrates the practicality of stateless ecosystems.

#9 about 3 min

Categorizing necessary side effects in functional applications

Accommodating networking and interface updates acknowledges the practical necessity of isolated impurities within real-world programs.

#10 about 2 min

Isolating side effects using Redux middleware components

Shifting asynchronous operations into epics or observables ensures subsequent state management interactions remain strictly pure.

#11 about 2 min

Scaling functional architectures and evaluating paradigm drawbacks

Expanding small features into complex applications requires aggressive abstraction boundaries to prevent side-effect pollution.

#12 about 3 min

Maintaining functional constraints with libraries and types

Integrating tools like Immutable.js and TypeScript safely enforces variable integrity regardless of underlying JavaScript looseness.

#13 about 2 min

Analyzing system performance targets for functional code

Breaking execution into numerous focused components mitigates memory footprint limits by deferring unused software execution.

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