kprotty

const std = @import("std");

pub fn main() !void {
    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
    defer std.debug.assert(gpa.deinit());
    const allocator = &gpa.allocator;

    const num_threads = std.math.max(1, (std.Thread.getCpuCount() catch 1) / 2);
    const epolls = try allocator.alloc(std.os.fd_t, num_threads);
    defer allocator.free(epolls);

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).

philandstuff

EuroClojure 2014, Krakow

Fergal Byrne, Clortex: Machine Intelligence based on Jeff Hawkins’ HTM Theory

• @fergbyrne
• HTM = Hierarchical Temporal Memory
• Slides

big data

• big data is like teenage sex
  • noone knows how to do it
  • everyone thinks everyone else is doing it

bmabey

(ns challenge
  " via http://www.infoq.com/presentations/rx-async
 Two input streams with the following values:
  stream1: 7, 1, 0, 2, 3, 1, ...
  stream2: 0, 7, 0, 4, 6, 5, ...
  Task:
  Create a new output stream that
   • yields, for each value of stream1, the sum of the previous 3
   • values of stream1,except if the sum is greater than some threshold in
     which case the next value of stream2 should be subtracted.

brandonbloom

;;;; Super top secret talk stuff nobody should ever see. Shhh.

(in-ns 'user)

(defmacro bench [& body]
  `((re-find #"\"(.*)\"" (with-out-str (time (do ~@body)))) 1))

*ns*

(require 'clojure.walk)

teropa

Tutorials

• The best tutorials are in the introductory books. See below.
• Getting Started with Clojure - A detailed tutorial on getting a modern (as of Jan 2013) Clojure workflow going.
  • Emacs Live is a nice development environment based on Emacs.
• Understanding The Clojure Development Ecosystem
• Clojure Docs Site is a community-driven doc site with good tutorials, and reference material going somewhat deeper than individual API docs.
• Functional Programming for the Rest of Us is a classic introduction to functional thinking
• [A comprehensive article on namespaces and different ways of requiring them](http://blog.8thlight.com/colin-jones/2010/12/05/clojure-libs-and-namespaces-require-use-import-and-ns.