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Language Basics

let bindings String interpolation Integers and floats Tuples Lists Booleans Case expressions Pipe operator

Types & Data

Custom types Record constructors Pattern matching Option values Result values Type aliases Generic types Opaque types

Functions & Modules

Named functions Anonymous functions Higher-order functions Recursion Module imports Qualified calls Public functions Function capture

Practical Gleam

List.map List.filter List.fold String.split Result.try Error propagation Bit arrays JavaScript target externals

Gleam / Practical Gleam

List.fold

Learn List.fold in Gleam with a focused explanation, a topic-specific example, and a mastery check.

12 min read • Intermediate

gleam-027.gleam

gleam

import gleam/list
pub fn main() { io.debug(list.fold([2,3,4], 0, fn(total,x){ total + x })) }

What to watch

Content source & attribution

Original Syntaxis Content · Original Syntaxis Content

Lesson quizzes

List.fold Mastery Check →