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# Generates combinations of letters or numbers, or anything really. The combinations
# include repeating values, unlike Ruby's regular Array#permutation method.
# 
# Usage:
#   generate('a'..'c', 3) do |seq|
#     puts seq.inspect #=> [a,a,a], [a,a,b], [a,a,c], [a,b,a]...
#   end
def generate(range, comb_len)
  range = range.to_a
  range_len = range.length

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# In your .gitconfig add this alias:
# [alias]
#   sred = "!source ~/.git_sred_log && sred_log"


# Assumes input date is formatted as YYYY-MM-DD,
# passes additional arguments to git-log.
sred_log() {
  sred_date="${1:-$(date +"%Y-%m-%d")}"
  shift

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# This algorithm takes a *sorted* list of integers, probably record
# IDs and compresses them into a series of ranges. It also includes a
# verification check that no values were lost.

def compress(ary)
  range_start = ary.first
  compressed = []

  ary.each_with_index do |value, index|
    # TODO: This could skip indices that have already been considered.

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pjson

Prettifies JSON on the command line.

Installation

Copy into anywhere on $PATH and chmod +x the file. Remove the .rb if you like.

Usage

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#!/usr/bin/env bash

SCRIPT="script/myapp-${1}.sh"
shift

exec ${SCRIPT} ${@}

timuruski

class TanksForAllTheFish < RTanque::Bot::Brain
  NAME = 'Tanks For All the Fish'
  MAX_RANGE = 400.0
  include RTanque::Bot::BrainHelper

  def tick!
    if targets_nearby?
      # command.speed = 2.0
      # command.heading = Random.rand(-1.0..1.0)

timuruski

class World
  def initialize(cells)
    @cells = cells
    @row_count = cells.length
    @col_count = cells[0].length
  end

  def living_neighbours(col, row)
    [
      cell(col, row - 1), # NORTH

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class RubyProcess
  WAIT_HELPER = <<-EOS
    # Top-level method to signal the parent process
    # and wait for an interrupt.
    def wait_for(seconds)
      # Signal parent we are ready.
      Process.kill('USR1', Process.ppid)

      # Wait for interrupt.
      sleep(seconds)

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# If you want to check whether a string matches a regular expression,
# but not return the match data, you can just use === the case equality operator.

# Bad
!! ('foobar' =~ /bar/) #=> true
!! ('foo' =~ /bar/)    #=> false

# Good
/bar/ === 'foobar'     #=> true
/bar/ === 'foo'        #=> false

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require 'io/console'

class PressAnyKey
  MESSAGE = 'Press any key to continue...'
  def initialize(console: nil, message: MESSAGE)
    console ||= File.open('/dev/tty', 'w+')
    console.puts message
    console.raw { |io| io.readchar rescue nil }
  rescue
    warn "Couldn't connect to console!"