djspiewak

Thread Pools

Thread pools on the JVM should usually be divided into the following three categories:

1. CPU-bound
2. Blocking IO
3. Non-blocking IO polling

Each of these categories has a different optimal configuration and usage pattern.

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

RichardForrester

-- ln -s ~/repos/config/init.lua ~/.hammerspoon/init.lua

-- Global variable for the Command Mode
cMode = hs.hotkey.modal.new({}, "F17")

-- Global variable for Delete Mode
dMode = hs.hotkey.modal.new({}, 'F20')

-- Global variable for Select Mode
sMode = hs.hotkey.modal.new({}, 'F19')

ttscoff

-- A global variable for the Hyper Mode
k = hs.hotkey.modal.new({}, "F17")

-- Trigger existing hyper key shortcuts

k:bind({}, 'm', nil, function() hs.eventtap.keyStroke({"cmd","alt","shift","ctrl"}, 'm') end)

-- OR build your own

launch = function(appname)

micha

(ns ui.form
  (:refer-hoplon :exclude [select input textarea label form])
  (:require [ui.form.input :as input]
            [ui.button     :as button]
            [ui.modal      :as modal]
            [ui.grid       :as grid]
            [ui.filters    :as filters]
            [ui.link       :as link]
            [ui.util       :as util]
            [ui.icon       :as icon]

micha

(defn throttle [c ms]
  (let [queued? (atom false)]
    (with-let [ret (cell @c)]
      (add-watch c (gensym)
        #(when-not @queued?
           (reset! queued? true)
           (with-timeout ms
             (reset! queued? false)
             (reset! ret @c)))))))

ohanhi

Learning FP the hard way: Experiences on the Elm language

by Ossi Hanhinen, @ohanhi

with the support of Futurice 💚.

Licensed under CC BY 4.0.

Editorial note

alandipert

alan@alanputer:~/Desktop$ tree
.
└── jars
    └── upcase-2.0.0.jar

1 directory, 1 file
alan@alanputer:~/Desktop$ boot repl
nREPL server started on port 50498 on host 127.0.0.1 - nrepl://127.0.0.1:50498
REPL-y 0.3.5, nREPL 0.2.8
Clojure 1.6.0

john2x

Clojure Destructuring Tutorial and Cheat Sheet

(Related blog post)

Simply put, destructuring in Clojure is a way extract values from a datastructure and bind them to symbols, without having to explicitly traverse the datstructure. It allows for elegant and concise Clojure code.

Vectors and Sequences

nblumoe

fireplace

• cpr => (require ... :reload)
• cpR => (require ... :reload-all)

Evaluation

• :Eval (clojure code) => runs (clojure code) in repl
• cpp => evaluate inn-most expessions under cursor
• cp<movement> => evaluate text described by <movement>
• cqp => opens quasi-repl
• cqc => quasi-repl command line window