reborg

Rich Already Answered That!

A list of commonly asked questions, design decisions, reasons why Clojure is the way it is as they were answered directly by Rich (even when from many years ago, those answers are pretty much valid today!). Feel free to point friends and colleagues here next time they ask (again). Answers are pasted verbatim (I've made small adjustments for readibility, but never changed a sentence) from mailing lists, articles, chats.

How to use:

• The link in the table of content jumps at the copy of the answer on this page.
• The link on the answer itself points back at the original post.

Table of Content

puredanger

;; Prints a table of vars in an ns with name/line/added/macro flag/deprecated flag

(defn pr-vars [ns-sym]
  (->> (ns-publics ns-sym) vals (map meta) (sort-by :name) 
    (map #(select-keys % [:name :line :added :macro :deprecated])) 
    (map #(merge {:added nil :macro false :deprecated false} %)) 
    clojure.pprint/print-table))

(pr-vars 'clojure.string)
;; | :added | :macro | :deprecated |                :name | :line |

int128

/*
Copyright 2017 Hidetake Iwata

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software

toomasv

Red [
	Author: 	"Toomas Vooglaid"
	Date: 		2017-12-31
	History: [
		2017-12-28 	{First draft}
		2018-01-20	{Added arrows, subtree moving, elementary interactive editing}
		2018-01-24 	{Edges formatting}
		2018-02-01	{Added differnt edge-ends, layout orientations, improved options-handling}
		2018-02-03	{Implemented stepped (orthogonal) edges, improved star layout}
		2018-02-06	{Added directions `across` (default: perpendicular to the step-away direction) and `away` (in the step-away direction).

toomasv

Red []
system/view/auto-sync?: off
pos: 145x143
nums: does [collect [
	repeat i 12 [keep compose [
		text (as-pair 
			(cosine i * 30 - 91) * 50 + (pos/x) 
			(sine i * 30 - 91) * 50 + (pos/y)) 
		(to-string i)
]]]]

bhauman

(ns figwheel.simple
  (:require
   [clojure.string :as string]
   #?@(:cljs [[goog.object :as gobj]])
   #?@(:clj [[clojure.walk :as walk]
             [cljs.repl.browser :as brow]
             [cljs.repl :as repl]
             [cljs.env :as env]
             [cljs.analyzer :as ana]
             [cljs.build.api :as bapi]

bhb

Friendly

A beginner-friendly REPL that combines

• rebel-readline
• Expound
• Speculative

Usage

mfikes

Start cljs.main with rebel-readline:

clojure -Sdeps '{:deps {github-mfikes/cljs-main-rebel-readline {:git/url "https://gist.github.com/mfikes/9f13a8e3766d51dcacd352ad9e7b3d1f" :sha "27b82ef4b86a70afdc1a2eea3f53ed1562575519"}}}' -i @setup.clj -m cljs.main

toomasv

Red [
	Original-idea: "Dave Andersen"
	Source: https://gitter.im/red/red?at=5a2a4fb9a2be46682876463d
]
inc: func ['val][set val (get val) + 1]
dec: func ['val][set val (get val) - 1]
incr: func ['val step][set val (get val) + step]
decr: func ['val step][set val (get val) - step]
++: make op! :incr
--: make op! :decr

ghadishayban

proto = <syntax> { import | package | option | message | enum | service | emptyStatement } <ws>

(* Header *)
syntax = ws "syntax" ws "=" ws ( "'proto3'" | '"proto3"' ) ws ";"

import = <ws "import" ws> [ "weak" | "public" ] <ws> strLit <ws ";">

package = <ws "package" ws> fullIdent <ws ";">

option = <ws "option" ws> optionName <ws "=" ws > constant <ws ";">