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puts "sfs"

10.times do |i|
  puts i
  { "Lon\nrem", i, i + 1 }
  sleep 1
end

sleep 2

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puts "sfs"
class Crystal::Playground::Agent
  def sendp(t)
    send(t)
  end
end

# $p.try &.sendp("bug")
10.times do |i|
  puts i

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require "benchmark"

def string_contains_word(source, word)
  return false unless source
  start = source.index(word)
  return false unless start
  return false if start > 0 && source[start-1].alphanumeric?
  return false if start + word.size < source.size && source[start + word.size].alphanumeric?
  true
end

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data = [{"Brian", 42}, {"Alan", 30}, {"Brian", 32}]

# unstable
data.sort_by &.[0]  # => [{"Brian", 42}, {"Alan", 30}, {"Brian", 32}]

# stable
data.map_with_index { |d,i| {d,i} }.sort_by { |di| {di[0][0], di[1]} }.map { |di| di[0] } # => [{"Alan", 30}, {"Brian", 42}, {"Brian", 32}]

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def ej(a, b)
  size = [a.size, b.size].min
  a[0...size].zip(b[0...size])
    .map { |e| e.max }
    .map(&.+(4))
    .select(&.>=(10))
    .sum
end

ej [1,5,3,4], [5,3,6]

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This sample show how to attach globally to events over dynamically created elements. And how can data-* attributes be used to customize behaviour.

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$ brew install imagemagick
$ brew install tesseract
$ ls -l1
Basic Infrastructure.pdf
extract.rb

$ ruby extract.rb 2> /dev/null
extracting page 1
.....................

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require "pg"

# start a posgress
# $ docker run --name mypg -e POSTGRES_DB=crystal -e POSTGRES_USER=postgress -e POSTGRES_PASSWORD= -p 5432:5432 postgres:9.5
# <ctrl+c> to stop server

# restart it
# $ docker start -a mypg
# <ctrl+c> to stop server

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require "json"

struct Slice(T)
  def to_json(json : JSON::Builder)
    json.array do
      each do |e|
        e.to_json(json)
      end
    end
  end

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unless ARGV.size > 0
  puts "  Missing executable file argument"
  puts "  Usage (in a Dockerfile)"
  puts "  RUN crystal run ./path/to/list-deps.cr -- ./bin/executable"
  exit 1
end

executable = File.expand_path(ARGV[0])

unless File.exists?(executable)