JoshCheek

# imgcat is this program, it works with iTerm2: https://github.com/JoshCheek/dotfiles/blob/main/bin/imgcat
# not sure how to make it responsive, you'd need a way to figure out how wide a character is, which may exist
# this number of spaces was determined experimentally and sadly it changes as you resize the terminal :shrug:

ruby -rshellwords -rjson -e '
ARGV.map { `curl --silent https://api.github.com/users/#{_1.shellescape}` }
    .map { JSON.parse _1 }
    .map { <<USER.chomp }.join("\n").display
                              #{_1["id"]}
                              #{_1["name"]}

JoshCheek

class A
  def self.b # we all agree this is a class method
    'A.b'
  end
end
A.b # => "A.b"

class << A
  def c # but what about this? it's the same thing, but we define it differently
    'A.c'

JoshCheek

#!/usr/bin/env ruby
require 'io/console'

class Grid
  def self.from_str(str, color:)
    rows = str.lines.map do |line|
      line.chomp.chars.map do |c|
        color if c != " ".freeze
      end
    end

JoshCheek

ruby -r io/console -e '
   h, w = $stdout.winsize
   options = ""
   loop do
     command = "grep -r #{options} ." # DO NOT INTERPOLATE INTO BASH SCRIPTS IN PROD!
     results = `echo -n | #{command} | head -n #{h-3}`
     print "\e[H\e[J\e[2B#{results}\e[H> #{command}\e[K\e[2D"
     c = $stdin.getch
     break puts "\e[H\e[J#{command}" if c == ?\C-c || c == "\r"
     options += c # the basic-est of input processing

JoshCheek

# https://twitter.com/josh_cheek/status/1587406334839889921
$**?$    # => ""
$**%$*$  # => ""
$**%**   # => ""
$**%$$   # => ""

$_ = {}
alias $*$_
public def *(*) = itself
alias ** *

JoshCheek

require "objspace"

# A name error
err = omg rescue $!
err # => #<NameError: undefined local variable or method `omg' for main:Object>

# The error has a message object instead of a message string
# this object is a secret internal class with an invalid constant name
_, message, * = ObjectSpace.reachable_objects_from err
message # => #<NameError::message:0x000000015590b608>

JoshCheek

# https://twitter.com/josh_cheek/status/1583584074652082176
def
  ( class
      class A
        self
      end::B < class C; self end
        self
    end
  ).something
  'hello'

JoshCheek

# https://twitter.com/inanna_malick/status/1582121657228922880

# files executable by the current user, with "detect" in the filename
# or files with a ".rs" extension, containing the string "map_layer"
find . \
  \( -type f -perm -u=x -name '*detect*' -print \) \
  -or \
  \( -type f -name "*.rs" -exec grep --files-with-matches map_layer '{}' ';' \)

JoshCheek

class Hash2 < Hash
  def initialize(default_value=(use_proc=true; nil), &default_proc)
    use_value = !use_proc
    if use_value && default_proc
      raise ArgumentError, "Provide a default value or a default proc, not both"
    end

    if use_value && !default_value.frozen?
      raise ArgumentError, "Default values must be frozen"
    end

JoshCheek

🤘 = Hash.new(Lol = Class.new)

🤘[🤘].define_method(:bbq) { 🤘[🤘] }

class Omg < 🤘[:😈]
  instance_eval { alias wtf new }
end

Omg.wtf.bbq # => Lol