hannestyden

# Emulating `sed` with inplace editing **without** backups for OS X
# Tested with zsh.

sedi () {
  local ext='.sedi-bak'
	sed -i $ext $@
	rm "${@: -1}$ext"
}

hannestyden

class Hash
  alias_method :[], :fetch # !> method redefined; discarding old []
end

h = {a: 1}

h[:a]           # => 1
h[:b] rescue $! # => #<KeyError: key not found: :b>
h[:b, 2]        # => 2

hannestyden

# # Adventures in `flat_map` land
#
# Investigating the conceptual difference between Ruby's `flat_map` and Scala's `flatMap`.
#
# Ruby's `flat_map`
a = [[1], [2], [[3]], [[4], 5], [[[6]]]]

a.flat_map { |e| e.first }       # => [1, 2, 3, 4, [6]]
# ... which is the same as ...
a.map { |e| e.first }.flatten(1) # => [1, 2, 3, 4, [6]]

hannestyden

# Composition

class Eat
  def do_it
    puts 'Nom, nom ...'
  end
end

class Say
  def do_it

hannestyden

# git lye

# An attempt to make rebasing easy, by draining unnessarcy commit noise.
# No warranty, use at own risk.

# Author Hannes Tydén <hannes@tyden.name>
# Contributor Tobias Schmidt <ts@soundcloud.com>

# TODO
# - Don't sign off all commits are by current user.

hannestyden

scala>   def whatIsMyName[A,B](map: Map[A, Seq[B]]): List[(A, B)] = 
     |     map.map { case (k, v) => v.map(k -> _) }.flatten.toList
whatIsMyName: [A, B](map: Map[A,Seq[B]])List[(A, B)]

scala> whatIsMyName(Map('a -> Seq(1,2), 'b -> Seq(3,4)))
res0: List[(Symbol, Int)] = List(('a,1), ('a,2), ('b,3), ('b,4))

hannestyden

class E < StandardError; end

def m(raise_exception)
  y do
    r(raise_exception)
    :nothing_raised
  end
rescue E
  :rescued
end

hannestyden

#!/bin/bash

function _andr_push {
  echo "Pushing $1"
  adb $target_flag push $1 $books_dir
}

function _andr_delete {
  echo "Removing $1"
  adb $target_flag shell "rm $books_dir/$1"

hannestyden

source 'https://rubygems.org' do
  gem 'mechanize'
end

hannestyden

#!/bin/sh
# .git/hooks/post-checkout
# chmod +x .git/hooks/post-checkout

if [ $(git symbolic-ref HEAD | cut -d '/' -f 3) == 'master' ]; then
    lines[0]="Master, Master, where's the dreams that I've been after?"
    lines[1]="Master, Master, you promised only lies"
    lines[2]="Laughter, laughter, all I hear or see is laughter"
    lines[3]="Laughter, laughter, laughing at my cries"
    echo "  ${lines[$((RANDOM%${#lines[*]}))]}";