Most cited

Posts that commenters keep linking to, ranked by how many different people have cited them in Hacker News comments. 1,045 posts.

Programming Languages
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421

Lambda Calculus Diagrams (2015)

The following table shows diagrams of identity, the booleans, some standard combinators, some Church numerals, the predecessor function on Church numerals, and Omega. term definition diagram alternative I/1 λx.x K/true λx.λy.x false/0 λx.λy.y S λx.λy.λz.(x z)(y z) Y λf.(λx.x x)(λx.f(x x)) 2 λf.λx.f(f x) 3 λf.λx.f(f(f…

425

A Rebuttal for Python 3

Zed Shaw, of Learn Python the Hard Way fame, has now written The Case Against Python 3. I’m not involved with core Python development. The only skin I have in this game is that I like Python 3. It’s a good language. And one of the big factors I’ve seen slowing its adoption is that respected people in the Python commu

429

Racket-On-Chez Status

posted by Matthew Flatt with thanks to collaborators Kent Dybvig, Andy Keep, Gustavo Massaccesi, Sarah Spall, Sam Tobin-Hochstadt, and Jon Zeppieri It's been almost a year since we decided to try running Racket on Chez Scheme, and it has been almost six ...

431

Sustainability with Rust

Rust is a programming language implemented as a set of open source projects. It combines the performance and resource efficiency of systems programming languages like C with the memory safety of languages like Java. Rust started in 2006 as a personal project of Graydon Hoare before becoming a research project at…

435

Effective Scala

Scala is one of the main application programming languages used at Twitter. Much of our infrastructure is written in Scala and we have several large libraries supporting our use. While highly effective, Scala is also a large language, and our experiences have taught us to practice great care in its application. What…

445

Lil: A Scripting Language

Lil is part of the technology that powers Decker , a multimedia creative tool inspired by HyperCard . Decker uses Lil for adding custom behavior to decks and the widgets within. Lil is designed to be learned in layers, but it is a richly multi-paradigm language which incorporates ideas from imperative, functional…