ksss

mrubykaigi

自己紹介

• Repro, inc.
• https://github.com/ksss
• https://twitter.com/_ksss_
• ruby/did_you_mean#91

ksss

# TempfileEnsureCloser.new.begin do |tmp|
#   gz = tmp.create(["tmp", ".gz"]) # File instance
#   get_object(gz)
#   csv = tmp.create(["tmp", ".csv"])
#   system("gunzip -c #{gz.path} > #{csv.path}")
# end #=> close and unlink all temp file
class TempfileEnsureCloser
  def initialize
    @tempfiles = []
  end

ksss

def packuuid(uuid)
  uuid.split('-').pack("H8H4H4H4H12")
end
def unpackuuid(byte)
  byte.unpack("H8H4H4H4H12").join('-')
end

uuid = "43e1254f-2d13-4193-b4b4-b9520ef0e9f3"
p uuid.length #=> 36
packed = packuuid(uuid)

ksss

module TypeChecker
  Error = Class.new(StandardError)

  class << self
    def register(this, meth, klass)
      this.module_eval(<<~RUBY, __FILE__, __LINE__ + 1)
        def #{meth}
          ret = super
          unless ret.kind_of?(#{klass})
            raise Error, "no implicit conversion of \#{self.class} into #{klass} got \#{ret.class}"

ksss

FROM matsumotory/ngx-mruby

ksss

require 'open-uri'

class MultiDownload
  def initialize(*urls)
    @urls = urls
  end

  def to_h
    @urls.map { |url|
      Thread.new(url) do |url|

ksss

$ ruby pretty-argumenterror.rb
ArgumentError: wrong number of arguments (given 3, expected 2)
from: pretty-argumenterror.rb
    1 | #! /usr/bin/env ruby
    2 |
 -> 3 | def foo(a, b)
    4 | end
    5 |
    6 | begin

ksss

class SwfFile
  # @example:
  #   SwdFile.new("foo.swf")
  def initialize(path)
    @path = path
  end

  # @example:
  #   x_min, x_max, y_min, y_max = swf.stage_size
  def stage_size

ksss

#! /usr/bin/env ruby

p [[
  "0111010001101000011000010110",
  "1110011010110010000001111001",
  "01101111011101010010000001100",
  "1100110111101110010001000000",
  "11011100110010101110110011001",
  "010111001000100000011001110",
  "11010010111011001101001011011",

ksss

#! /usr/bin/env perl

use utf8;
use Encode;
use charnames ':full';

binmode STDIN, ":utf8";
binmode STDOUT, ":utf8";

if (@ARGV == 0) {