Learn how Clojure transducers let you build efficient, composable pipelines without creating intermediate collections. A practical example, performance comparison, and checklist guide you from lazy seqs to transducer‑based processing.

Community & Careers · Blog

transducers

clojure functional-programming

Community & Careers

Article0 replies2,920 followingPosted 22 Apr 2026, 22:32 UTC87.9K views2,844 votes

Gleam's `use` Expression: Flat Pipelines Without Exceptions

Gleam has no exceptions, so fallible code can turn into a staircase of case expressions. The `use` expression flattens it — here's how the sugar works, with a result.try pipeline and its trade-offs.

Community & Careers · Blog

functional-programming

gleam beam

Community & Careers

Article0 replies2,428 followingPosted 16 Jul 2026, 04:22 UTC33K views2,287 votes

Elm's JSON Decoders: Making Bad API Data a Problem You Handle, Not a Crash You Debug

Elm forces all external JSON through explicit, composable decoders that return a Result. A worked example shows how this turns API contract drift into handled errors instead of production crashes — and where the boilerplate starts to cost you.

Community & Careers · Blog

functional-programming json-decoders

elm

Community & Careers

Article0 replies2,105 followingPosted 12 Oct 2026, 13:42 UTC36.6K views1,746 votes

Using Gleam’s Opaque Types for Safer Library APIs

Learn how Gleam’s opaque types hide constructors, enforce compile‑time encapsulation, and let you evolve library internals without breaking user code.

Community & Careers · Blog

opaque-types functional-programming library-design

Community & Careers

Article0 replies3,301 followingPosted 30 Oct 2025, 19:05 UTC136.5K views1,257 votes

PureScript's Effect System: What Replaced Eff and Why It Still Matters

PureScript's Eff monad and effect rows were removed in 0.12. Here's how the current Effect and Aff model works, with a working example and honest trade-offs.

Community & Careers · Blog

frontend

purescript functional-programming

Community & Careers

Article0 replies3,070 followingPosted 01 Aug 2025, 01:57 UTC132.4K views2,926 votes

Eliminating Impossible UI States with Elm Custom Types

Stop fighting contradictory UI states. Learn how to use Elm's custom types to make invalid states—like showing a loading spinner and an error message simultaneously—impossible to represent.

Community & Careers · Blog

frontend-architecture functional-programming elm-lang

Community & Careers

Article0 replies978 followingPosted 21 Aug 2026, 02:57 UTC121.4K views1,572 votes

Clojure Transducers: One Pipeline, Several Contexts

Transducers let you write a transformation once and run it over vectors, channels, or streams. Here is the mental model, a worked example, and when not to bother.

Community & Careers · Blog

transducers

clojure functional-programming

Community & Careers

Article0 replies2,141 followingPosted 14 Oct 2025, 13:23 UTC110.1K views2,559 votes

Using Swift’s Result Type for Explicit Error Handling

Learn how Swift’s Result type gives you typed errors without throwing, with a practical network‑request example and guidance on when to use it.

Community & Careers · Blog

result-type functional-programming

swift