r/functionalprogramming is a subreddit with 35k members. The community frequently discusses functional programming, languages, haskell, language, and lambda calculus, and the most common flair used is fp, question, intro to fp, elm, and haskell.
A subreddit for functional programming related material.
Popular Topics in r/functionalprogramming
#1
Functional Programming
88 posts
#2
Languages
14 posts
#3
Haskell
12 posts
#4
Language
12 posts
#5
Lambda Calculus
10 posts
#6
Functional
10 posts
#7
Elixir
8 posts
#8
Fp
8 posts
#9
Types
7 posts
#10
Ocaml
6 posts
Flair Used in r/functionalprogramming
#1
FP
: "leetcoding in python all day after writing mostly scala for years felt like writing assembly"
56 posts
#2
Question
: "What's the most vibrant language for fun and open source?"
32 posts
#3
Intro to FP
: "How the functional programming in Scala book simplified my view on side effects"
19 posts
#4
Elm
: "The Same App in React and Elm: A Side-by-Side Comparison"
10 posts
#5
Haskell
: "State of Haskell Survey 2025"
9 posts
#6
TypeScript
: "Parse, Don't Validate — In a Language That Doesn't Want You To · cekrem.github.io"
8 posts
#7
λ Calculus
: "Binary Lambda Calculus is Hard"
8 posts
#8
Conferences
: "Alexis King: The Unreasonable Effectiveness of Constructive Data Modeling"
7 posts
#9
Category Theory
: "Selective Applicative Functors: The Missing Theoretical Basis for Determined Choice"
6 posts
#10
OO and FP
: "Side-effects are a scale problem"
5 posts
Member Growth in r/functionalprogramming
Yearly
+3k members(10.2%)
About
GummySearch helps people research Reddit communities by organizing activity, growth, themes, and post-level signals into one place.
This page gives a focused view of r/functionalprogramming, including current member size, discussion patterns, product reviews, and related communities to explore.
This data is synced periodically so insights stay current and useful for ongoing research.
Last updated: September 14, 2026