Composition

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1 code snippet

3 question banks

1 community item

composition

Code Snippets

1 snippet

Code Snippet

Compose and Pipe Helpers

Composing small functions into a single transformation is the bread and butter of functional pipelines. This snippet contrasts the right-to-left `compose` (math notation) with the left-to-right `pipe` (data-flow notation), then shows an async-aware `pipeAsync` for chained `await`-able steps. Use them to flatten nested calls into a readable left-to-right (or right-to-left) sequence.

functional-programming

954

Medium

Question Banks

3 items

Question Bank

Premium

Currying and Functional Composition Quiz

Compose, curry, memoize, and partially apply: the higher-order toolkit that turns small JavaScript functions into reusable building blocks.

JavaScript

quiz

currying

composition

higher-order-functions

419

Hard

Question Bank

Premium

React Component Patterns and Composition Quiz

Six drills on the classic React patterns: composition over inheritance, render props, higher-order components, compound components, and slot-style children.

JavaScript

quiz

react

design-patterns

composition

327

Hard

Question Bank

Premium

React HOC for Conditional Render (Auth-Aware): Two Approaches Quiz

Two approaches to a conditional-render HOC for authentication (props-based gate vs context-based gate), plus companions on the hook equivalent and on the HOC return-type contract.

JavaScript

quiz

react

design-patterns

composition

Hard

Community

1 item

Article

Composition Over Inheritance, with Real Examples

The slogan everyone repeats and almost no one operationalizes. What composition actually looks like at the field level, where inheritance is still right, and the refactor when you've gone too deep.

203

4.1 (10)

Apr 8, 2026

by @liamreed