jpillora

// A small SSH daemon providing bash sessions
//
// Server:
// cd my/new/dir/
// #generate server keypair
// ssh-keygen -t rsa
// go get -v .
// go run sshd.go
//
// Client:

ztellman

Fiction

• Fictions and The Aleph by Borges
• Invisible Cities by Calvino

More Technical

• An Introduction to General Systems Thinking by Weinberg
• Data and Reality by Kent
• Patterns of Software by Gabriel

ptaoussanis

(comment ; Fun with transducers, v2

  ;; Still haven't found a brief + approachable overview of Clojure 1.7's new
  ;; transducers in the particular way I would have preferred myself - so here goes:

  ;;;; Definitions
  ;; Looking at the `reduce` docstring, we can define a 'reducing-fn' as:
  (fn reducing-fn ([]) ([accumulation next-input])) -> new-accumulation
  ;; (The `[]` arity is actually optional; it's only used when calling
  ;; `reduce` w/o an init-accumulator).

loganlinn

(ns history
  "Light wrappers and utils for js/history")

(defn back! [] (.back js/history))

(defn forward! [] (.forward js/history))

(defn go! [idx] (.go js/history idx))

(defn replace-state!

steeve

How to cross compile Go with CGO programs for a different OS/Arch

It is possible to compile Go programs for a different OS, even though go build says otherwise.

You'll need:

• a valid toolchain for the platform/os you're targetting
• Go Tip (works on 1.1 and 1.2rc1 but you might as well be on tip)
• golang-crosscompile helper script https://github.com/davecheney/golang-crosscompile
• the patch provided

scttnlsn

package main

import (
	"bufio"
	"flag"
	"fmt"
	"net"
	"strconv"
	"strings"
	"time"

fogus

(defn postfix [& e]
  (reduce #(if (fn? %2)
             (let [[l r & m] %]
               (cons (%2 r l) m))
             (cons %2 %)) [] e))

jakearchibald

Snow in canvas land

Other people's code is awful, and your own code from months previous counts as someone else's. With this and the festive spirit in mind, I dug up a canvas snow demo I made two years ago to see how bad my code really was.

Turns out the performance landscape has changed quite a bit, but after applying a couple of workarounds, best practices, and memory management, I got the demo running smoother than it ever did.

Ugh, I can't believe I just wrote "performance landscape". Anyway...

How does the demo work?

martintrojer

;; http://www.infoq.com/presentations/core-logic

(ns rdf
  (:refer-clojure :exclude [==])
  (:use [clojure.core.logic]))

(def g
  [[:a1 :rdf/type :sdx/FederationService]
   [:a1 :rdf/type :sdx/name "movies"]
   [:a1 :rdf/exposedServices :_syscoll1]

ptaoussanis

(def ^:private gc-sm-cache!                                                                                                                                                          
  "Maintains maximum cache size by intelligently pruning less valuable items."
  (let [gc-running? (atom false)]                                                                                                                                                 
    (fn [cache ttl max-items now]                                                                                                                                                  
      (when-not @gc-running?                                                                                                                                                      
        (reset! gc-running? true)                                                                                                                                                 
        (let [snapshot @cache