I wanted to map over a nested array in factor so I created a helper function:

: nested-map ( a quote -- a' ) swap [ over map ] map nip ;

which i then called with

{ { 1 2 } { 3 4 } } [ 1 + ] nested-map

But when I call it I get the error from the title.

If I just paste the body of the function it works as intended:

{ { 1 2 } { 3 4 } } [ 1 + ] swap [ over map ] map nip

So I guess I have two questions: is there a better way to achieve the original goal, but also how am I supposed to create higher order functions without getting this error?

Discussion on hacker news: https://news.ycombinator.com/item?id=40804122

I'm posting this mostly for the new hacker news discussion: https://news.ycombinator.com/item?id=40736174

> F is a pure functional concatenative language originally designed as an extension of False. F contains the list-operations of K3 and the dip combinator of Joy. Floating-point and symbolic datatypes are supported. One-time assignment is enforced in syntax. A theory of function-valence and -charge is outlined. F also contains a general continuation primitive $, and the pattern sublanguage of XY. G is a variant of F in which the K3 adverbs are implemented as primitives.

Discussion on lobsters: https://lobste.rs/s/m9xv5y/f_functional_false

Factor gains a quit function (and preserves history)!

This is already in the sidebar, but now there's a fresh post on Lobsters, so maybe some good discussion will come of it.

Discussion on lobsters: https://lobste.rs/s/mwbsed/first_class_contexts

• Discussion on lobsters: https://lobste.rs/s/l8o4j8/forsp_forth_lisp_hybrid_lambda_calculus
• Repo: https://github.com/xorvoid/forsp/

Discussion on lobsters: https://lobste.rs/s/fxkhfk/failing_at_combinatorics_with_haskell

Discussion on lobsters: https://lobste.rs/s/oxjvv0/0_1_0_2

> It's not that Roc only supports base-10 arithmetic. It also supports the typical base-2 floating-point numbers, because in many situations the performance benefits are absolutely worth the cost of precision loss. What sets Roc apart is its choice of default; when you write decimal literals like 0.1 or 0.2 in Roc, by default they're represented by a 128-bit fixed-point base-10 number that never loses precision, making it reasonable to use for calculations involving money.

> In Roc, floats are opt-in rather than opt-out.

lobsters discussion: https://lobste.rs/s/mnuhwc/go_s_concurrency_dynamic_language_rye

From the STOMP homepage:

> ### What is it?

> STOMP is the Simple (or Streaming) Text Orientated Messaging Protocol.

> STOMP provides an interoperable wire format so that STOMP clients can communicate with any STOMP message broker to provide easy and widespread messaging interoperability among many languages, platforms and brokers.

> ### Simple Design

> STOMP is a very simple and easy to implement protocol, coming from the HTTP school of design; the server side may be hard to implement well, but it is very easy to write a client to get yourself connected. For example you can use Telnet to login to any STOMP broker and interact with it!

From John's blog post:

> In the interest of learning Factor, I thought I would write a bit about parsing the STOMP protocol, and then about how to implement a client library using connection-oriented networking, interacting with it using mailboxes, and then building a command-line interface using the command-loop vocabulary.

> There are many STOMP servers and clients available in different languages. I tried a few and decided that Apache ActiveMQ was one of the most convenient to setup and reliable to work with, but others are available as well.

Discussion on lobsters

Discussion on lobsters

John B's blog post calls it:

> . . . a pretty neat hour long introduction going over a lot of features that users new to the language might be interested in.

The video creator's description:

> This is an introductory tutorial for a stack-based (concatenative) programming language Factor. It covers some basic language constructs and a few features of the interactive development environment that is shipped with Factor.

> I've re-shot my two prior recordings combining everything into a single video.

Discussion on lobsters: https://lobste.rs/s/r50zeq/ukrainian_coder_s_new_programming

• https://blog.runreveal.com/introducing-pql/
• https://pql.dev/
• https://github.com/runreveal/pql

I don't yet have a feel for any key differences between pql and PRQL.

Copied from the readme:

---

cosh is a concatenative command-line shell.

Why?

Basic shell operations like ls, ps, stat, and so on are implemented as functions that return first-class values, as opposed to relying on executables that return text streams. This makes working with the results simpler:

• Find file paths matching a string, and search those files for data

sh: sh find . -iname '*test*' -print0 | xargs -0 grep data cosh: sh lsr; [test m] grep; [f<; [data m] grep] map

• Find all processes using more than 500M of memory:

sh: sh ps --no-headers aux | awk '$6>500000' cosh: sh ps; [mem get; 1000 1000 *; 500 *; >] grep

A small set of versatile primitives means that less needs to be remembered when compared with typical shells (see e.g. the various flags for cut(1)), though some commands may be longer as a result:

• Get the second and third columns from each row of a CSV file:

sh: sh cut -d, -f2,3 test-data/csv cosh: sh test-data/csv f<; [chomp; , split; (1 2) get] map

• Sort files by modification time:

sh: sh ls -tr cosh: sh ls; [[stat; mtime get] 2 apply; <=>] sortp

Arithmetical operators and XML/JSON/CSV encoding/decoding functions reduce the number of times that it becomes necessary to use a more full-featured programming language or a third-party executable:

• Increment floating-point numbers in file:

sh: sh sed 's/$/+10/' nums | bc cosh: sh nums f<; [chomp; 10 +] map

• Get the first value from the "zxcv" array member of a JSON file:

sh: sh jq .zxcv[0] test-data/json2 cosh: sh test-data/json2 f<; from-json; zxcv get; 0 get

It also integrates with external executable calls, where that is necessary:

• Print certificate data:

bash: bash for i in `find . -iname '*.pem'`; do openssl x509 -in $i -text -noout; done cosh: sh lsr; [pem$ m] grep; [{openssl x509 -in {} -text -noout}] map;

See the full documentation for more details.

Just because Exercism doesn't offer your favorite language as an official track, it doesn't mean we can't play at all. Post some solutions to the weekly challenges in the language of your choice!

Copied from the project's readme:

---

Introduction

Scale is a procedual and object oriented concatenative stack oriented compiled programming language inspired by Lua and Porth.

The Compiler is a source-to-source compiler, as it converts your source code to valid C code, that is then compiled by Clang.

Scale supports both 32-bit and 64-bit systems, but 64-bit is strongly recommended.

Examples

Examples can be found in the examples directory.

Installation

Run the following commands: shell $ clang++ install-sclc.cpp -o install-sclc -std=gnu++17 $ ./install-sclc

Documentation

A list of all features can be found here.

The Scale Framework documentation can be viewed by running the following command: shell $ sclc -doc-for Scale

Copied from the project's readme:

---

• blacklight is a programming language which is concurrent, stack-based, and concatenative (BLPL)

• blacklight is a virtual machine for implementing highly concurrent languages (BLVM)

• blacklight is a data interchange format for communicating between processes and across networks (BLBC)

Features --------

blacklight (BLVM) is awesome, here's a few reasons why:

• easy to use builtin parallelism through native concurrency primatives
• threadsafe communication between concurrency units
• rich datatype primitives
• an easy to use homoiconic Forth-like assembly language (BLPL)
• runtime bytecode manipulation and generation
• UTF-8 native datatypes
• multi-architecture and cross-platform (currently: x86_64, ARM, macos, linux, windows)
• (in progress) highly optimized vector operations on supported CPUs
• (planned) security contexts and permissions

Documentation -------------

• The blacklight Wiki has documentation and links (work in progress).
• The examples directory contains several demonstration scripts to get you started.

BLPOC -----

The current implementation of blacklight is a proof-of-concept. It's functional but intended primarily for proving out features, strategies, and specifications. Once The ABI is stable it will be reimplemented with optimization and compatibility in mind against a full test suite. As is, there is very little about blacklight that isn't subject to change to better reflect the results of research and experimentation.

A new wiki page has been started to show case example programs in various catlangs.

From the homepage:

> Rye is a high level, homoiconic dynamic programming language based on ideas from Rebol, flavored by Factor, Linux shell and Go. It's still in development, but we are focused on making it useful as soon as possible.

> It's written in Go and could also be seen as Go's scripting companion as Go's libraries are very easy to integrate, and Rye can be embedded into Go programs as a scripting or a config language.

> I believe that as a language becomes higher level it starts bridging the gap towards user interfaces. Rye has great emphasis on interactive use (Rye console) where we intend to also explore that.

Discussion on Hacker News: https://news.ycombinator.com/item?id=39570343

Hey that's me! No, not the amazing Factor dev that authored this post. No, not the contributor who jumped in and saved the day. I'm the

> one of the members of the Factor Discord server

who complained about numbers! Woohoo!