isomorphisms

#OUTPUT: https://twitter.com/isomorphisms/status/566965475188670464
#AFTER: https://www.youtube.com/watch?v=RhpVSV6iCko
#ORIGIN: V. I. Arnol'd

#main parts are:
# — polyroot
# — concatenation of the list called "dance"

isomorphisms

#!/bin/bash



shopt -s expand_aliases
alias log='tee -a productivity.log; date >> productivity.log'



finished()

isomorphisms

#!/bin/bash


finished()
{
    echo -e "\n\nDone!"
    exit $?
}
trap finished SIGINT

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#IMPORTANT
alias del='gvfs-trash'
alias rm='rm -i'
alias mv='mv -i'

isomorphisms

Unicode[edit]

Combining characters[edit]

In plain text scenarios where markup cannot be used, Unicode offers a number of
combining characters that achieve similar effects.

The “combining long stroke overlay” (U+0336) results in an unbroken stroke
across the text:

isomorphisms

require(lubridate)
`k'in` <- ddays(1)
winal <- 20 * `k'in`
tun <- 18 * winal
`k'atun` <- 20 * tun
`b'aktun` <- 20 * `k'atun`
piktun <- 20 * `b'aktun`
kalabtun <- 20 * piktun
kinichiltun <- 20 * kalabtun
alautun <- 20 * kinichiltun

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#!/usr/bin/perl -s
#########################################################################
#
# TTYtter v2.1 (c)2007-2012 cameron kaiser (and contributors).
# all rights reserved.
# http://www.floodgap.com/software/ttytter/
#
# distributed under the floodgap free software license
# http://www.floodgap.com/software/ffsl/
#

isomorphisms

#!/bin/bash

# imgur script by Bart Nagel <bart@tremby.net>
# version 4
# I release this into the public domain. Do with it what you will.

# Required: curl
#
# Optional: xsel or xclip for automatically putting the URLs on the X selection 
# for easy pasting

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catalan <- function(n) {
#make a memo
if (!exists('cat.save') || length(cat.save) < n) { cat.save <<- integer(n) }


#actual catalan function

#base layer
if (n==0) 1

isomorphisms

What I don’t like about object-oriented languages: there are three key ideas that came out of the OO paradigm—one great, one good-but-flawed, one terrible.

• The great idea is abstraction: interfaces.
• The good idea with the wrong default is subtyping. Subtyping is nice—sometimes you want it—but parametric polymorphism is the right default. Think about a function like list.map—you want to have an α list, and then a function that takes α→β. You don’t want to have an object list, and then a function that takes object→object. That’s just wrong.

These mis-features, combined with the verbosity of the languages, make it hard to abstract out simple functions.