candera

Embedding an SSH-accessible REPL in a Clojure process

N.B. This is now a library, thanks to the efforts of the wonderful @mtnygard. And the README does a good job of making clear just how terrible an idea it is to actually do this. :)

As any Clojurist knows, the REPL is an incredibly handy development tool. It can also be useful as a tool for debugging running programs. Of course, this raises the question of how to limit access to the REPL to authorized parties. With the Apache SSHD library, you can embed an SSH server in any JVM process. It takes only a little code to hook this up to a REPL, and to limit access either by public key or

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

brunoborges

if (arguments.length != 2) {
    print("Usage: jjs -cp lib/kvclient.jar oracle-nosql-put.js -- <key> <value>");
    exit(1);
}

var oracle = Packages.oracle;

var KVStore = oracle.kv.KVStore;
var KVStoreConfig = oracle.kv.KVStoreConfig;
var KVStoreFactory = oracle.kv.KVStoreFactory;

kachayev

Parsing CSS file with monadic parser in Clojure

Inspired by "Parsing CSS with Parsec".

Just quick notes and code that you can play with in REPL.

By @kachayev

0. Intro

gigasquid

(defn fizzbuzz [n]
  (let [all-nums (range 0 n)
        folder (fn [fb-str p-num fb-coll]
                 (mapcat (fn [x] (cons fb-str (rest x)))
                         (partition-all p-num fb-coll)))
        fizz (folder "fizz" 3 all-nums)
        buzz (folder "buzz" 5 fizz)
        fizzbuzz (folder "fizzbuzz" 15 buzz)]
    fizzbuzz))

favila

(ns favila.async-util
  "Some missing pieces of core.async.

   as-transducer: Make a transducer function easily without Clojure 1.7.
   go-pipe: async/pipe, but returns the go-loop.
   fast-pipeline-blocking: faster than async/pipeline-blocking, but unordered results.
   blocking-consumer: consume a channel with multiple worker threads."
  (:require [clojure.core.async :as async
             :refer [go go-loop <! >! <!! >!! close! take! put! chan]]))

cgrand

(defmulti transmogrify 
  "Rewrites the last form of a thread-last to use transducer (if possible)."
  (fn [f xform src & args] f))

(defmacro transmogrify->>
  "Like ->> but uses transducers"
  ([x] x)
  ([src & xs]
    (let [end (last xs)
          xforms (butlast xs)

aphyr

(defrecord Retry [bindings])

(defmacro with-retry
  "It's really fucking inconvenient not being able to recur from within (catch)
  expressions. This macro wraps its body in a (loop [bindings] (try ...)).
  Provides a (retry & new bindings) form which is usable within (catch) blocks:
  when this form is returned by the body, the body will be retried with the new
  bindings."
  [initial-bindings & body]
  (assert (vector? initial-bindings))

evren

/*
 * Copyright (c) 2017 Stardog Union. <http://www.stardog.com>
 *
 * 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
 * distributed under the License is distributed on an "AS IS" BASIS,

pjstadig

The Pledge

One thing that always made me a little sad about transducers was how map lost its ability to iterate multiple collections in parallel. This is actually my favorite feature of map. For example:

(map + (range 5) (range 5 10))
=> (5 7 9 11 13)

One somewhat practical use of this is if you want to compare two sequences, pairwise, using a comparator. Though I wish that every? took multiple collections, this is an adequate substitute: