wdkrnls

function sitegen
    cd /home/public
    rm *.html
    cd /home/public/posts
    set posts (ls)
    ser webdir /home/public
    set header $webdir/conf/header.html
    set footer $webdir/conf/footer.html
    for post in $posts
        if test (echo $post | sed "s/.*\.//") = md

wdkrnls

pattern = """
    \b                # new word boundary
    NCC               # Match NCC
    ( ?-? ?)          # Match '-'
    ([0-9][0-9]+)     # Match registry number
    ( ?-? ?)          # Match optional '-'
    ([A-Z]?)          # Match optional suffix
    \b                # end word boundary
"""

wdkrnls

Markup Cheat sheet for Org-mode

Heading 1

Heading 2: Set a deadline and a schedule

[66%] Heading 3: a list with checkboxes

1. [X] task 1
2. [X] task 2
3. [ ] task 3

wdkrnls

#lang racket

(provide
 (contract-out
  [make-coinage (-> (listof positive-integer?) list?)]))

(define (positive-integer? x)
  (and (positive? x)
       (integer? x)))

wdkrnls

require("clicks-in-new-buffer.js");
require("page-modes/google-search-results.js");
require("page-modes/wikipedia.js");
require("session.js");
require("block-content-focus-change.js");
require("favicon");
require("content-policy.js");
require("index-webjump.js");

xkcd_add_title = true;

wdkrnls

#' Clever chunking algorithm into roughly equal parts
#' http://stackoverflow.com/questions/2130016/splitting-a-list-of-arbitrary-size-into-only-roughly-n-equal-parts
chunk <- function(x, k) {
  n <- length(x)
  q <- n %/% k
  r <- n %% k
  lapply(seq.int(1, k), function(i) {
    x[seq(from = (i - 1)*q + min(i - 1, r) + 1, to = i * q + min(i, r))]
  })
}

wdkrnls

#' My function for doing cross validation (creating the splits before hand)
xvalidate <- function(f, formula, data, bin, ...) {
  fold <- length(bin)
  xs <- seq.int(1, fold)

  lapply(xs, function(x) {
    train <- data[unlist(bin[-x]),]
    test <- data[bin[[x]],]

    model <- f(formula, data = train, ...)

wdkrnls

on_circle_iter <- function(theta) {
  if(theta < 2*pi) theta else on_circle(theta - 2*pi)
}

on_circle <- function(theta) Vectorize(on_circle_iter, SIMPLIFY = FALSE)

all(on_circle(pi*seq(0, 8, by = 2) == 0)

wdkrnls

# all.equal does a lot, nearly_equal does little.
nearly_equal <- function(x, y, tol = sqrt(.Machine$double.eps)) y < x + tol & y > x - tol

# syntax can be confusing to beginners
which_is <- function(x, test) x[which(test)]

x <- seq(0, 2*pi, by = 0.01)
library(magrittr)
x %>% which_is(nearly_equal(sin(x), 0.5, tol = 0.005))

wdkrnls

#!/usr/bin/env racket
#lang racket/base
(require racket/vector)


;; Capture the command line args sent to this script
(define args
  (current-command-line-arguments))