Skip to content

Instantly share code, notes, and snippets.

@Akiyah Akiyah/result.txt
Last active May 4, 2019

Embed
What would you like to do?
Learn more about clone URLs
Download ZIP
Solver of RubyKaigi 2019 Cookpad Daily Ruby Puzzles
Raw
result.txt
Example
2019-05-04 02:31:22 +0900
...........................
-----
def foo
"Hello world" if%
false
end
puts foo
-----
.
-----
def foo
"Hello world" if
! false
end
puts foo
-----
.
-----
def foo
"Hello world" if
! false
end
puts foo
-----
.
-----
def foo
"Hello world" if
! false
end
puts foo
-----
.
-----
def foo
"Hello world" if
! false
end
puts foo
-----
.
-----
def foo
"Hello world" if
! false
end
puts foo
-----
.
-----
def foo
"Hello world" if
! false
end
puts foo
-----
.
-----
def foo
"Hello world" if
! false
end
puts foo
-----
.
-----
def foo
"Hello world" if
!false
end
puts foo
-----
-----
def foo
"Hello world" if
:false
end
puts foo
-----
..................
2019-05-04 02:44:11 +0900
Problem 1-1
2019-05-04 02:44:11 +0900
..........................................
-----
# Hint: Use Ruby 2.6
puts "#{"Goodbye" ..; "Hello"} world"
-----
.
-----
# Hint: Use Ruby 2.6
puts "#{"Goodbye" .. ;"Hello"} world"
-----
...............
2019-05-04 02:57:01 +0900
Problem 1-2
2019-05-04 02:57:01 +0900
.....
-----
puts$&.then {
# Hint: &. is a safe
# navigation operator
"Hello world"
}
-----
.........................................................................
2019-05-04 03:14:12 +0900
Problem 1-3
2019-05-04 03:14:12 +0900
...................................................................................................
-----
include Math
# Hint: the most beautiful equation
Out, *,
Count = $>,
$<, E ** (2i * PI)
Out.puts("Hello world" *
Count.abs.round)
-----
.........................................................
2019-05-04 03:48:55 +0900
Problem 2-1
2019-05-04 03:48:55 +0900
.....................................
-----
def say
-> {
"Hello world"
}.
# Hint: you should call the Proc.
yield
end
puts say { "Goodbye world" }
-----
.
-----
def say
-> {
"Hello world"
}
. # Hint: you should call the Proc.
yield
end
puts say { "Goodbye world" }
-----
.
-----
def say
-> {
"Hello world"
}
. # Hint: you should call the Proc.
yield
end
puts say { "Goodbye world" }
-----
.
-----
def say
-> {
"Hello world"
}
.# Hint: you should call the Proc.
yield
end
puts say { "Goodbye world" }
-----
...........................................................................
2019-05-04 04:14:21 +0900
Problem 2-2
2019-05-04 04:14:21 +0900
......................................................
-----
e = Enumerator.new do |g|
# Hint: Enumerator is
#
essentially Fiber.
yield "Hello world"
end
puts e.next
-----
.
-----
e = Enumerator.new do |g|
# Hint: Enumerator is
#
essentially Fiber.
yield "Hello world"
end
puts e.next
-----
.
-----
e = Enumerator.new do |g|
# Hint: Enumerator is
# e
ssentially Fiber.
yield "Hello world"
end
puts e.next
-----
.
-----
e = Enumerator.new do |g|
# Hint: Enumerator is
# es
sentially Fiber.
yield "Hello world"
end
puts e.next
-----
.
-----
e = Enumerator.new do |g|
# Hint: Enumerator is
# ess
entially Fiber.
yield "Hello world"
end
puts e.next
-----
.
-----
e = Enumerator.new do |g|
# Hint: Enumerator is
# esse
ntially Fiber.
yield "Hello world"
end
puts e.next
-----
.
-----
e = Enumerator.new do |g|
# Hint: Enumerator is
# essen
tially Fiber.
yield "Hello world"
end
puts e.next
-----
.
-----
e = Enumerator.new do |g|
# Hint: Enumerator is
# essent
ially Fiber.
yield "Hello world"
end
puts e.next
-----
.
-----
e = Enumerator.new do |g|
# Hint: Enumerator is
# essenti
ally Fiber.
yield "Hello world"
end
puts e.next
-----
.
-----
e = Enumerator.new do |g|
# Hint: Enumerator is
# essentia
lly Fiber.
yield "Hello world"
end
puts e.next
-----
.
-----
e = Enumerator.new do |g|
# Hint: Enumerator is
# essential
ly Fiber.
yield "Hello world"
end
puts e.next
-----
.
-----
e = Enumerator.new do |g|
# Hint: Enumerator is
# essentiall
y Fiber.
yield "Hello world"
end
puts e.next
-----
.
-----
e = Enumerator.new do |g|
# Hint: Enumerator is
# essentially
Fiber.
yield "Hello world"
end
puts e.next
-----
.
-----
e = Enumerator.new do |g|
# Hint: Enumerator is
# essentially
Fiber.
yield "Hello world"
end
puts e.next
-----
.............................................
2019-05-04 04:39:07 +0900
Problem 2-3
2019-05-04 04:39:07 +0900
......................................................................
-----
$s = 0
def say(n = 0)
$s = $s * 4 + n
end
i, j, k = 1, 2, 3
say if
say j
say k
# Hint: Binary representation.
$s != 35 or puts("Hello world")
-----
............................................................................
2019-05-04 05:11:20 +0900
Problem 3-1
2019-05-04 05:11:20 +0900
..............................................................................................................
-----
def say s="Hello", t:'world'
"#{ s }#{ t } world"
end
# Hint: Arguments in Ruby are
# difficult.
puts say t:p
-----
..
2019-05-04 05:36:03 +0900
Problem 3-2
2019-05-04 05:36:03 +0900
..............
-----
def say s, t=#"Goodbye "
# Hint: You can ignore a warning.
s = "#{ s } #{ t }"
t + "world"
end
puts say :Hello
-----
.......................................................................................................
2019-05-04 06:01:55 +0900
Problem 3-3
2019-05-04 06:01:55 +0900
...........................
-----
def say
"Hello world" if%
false && false
# Hint: No hint!
end
puts say
-----
....................................................
2019-05-04 06:19:22 +0900
Extra 1
2019-05-04 06:19:22 +0900
...............................................................
-----
Hello = "Hello"
# Hint: Stop the recursion.
def Hello
Hello%() +
" world"
end
puts Hello()
-----
...................................
2019-05-04 06:41:46 +0900
Extra 2
2019-05-04 06:41:46 +0900
......
-----
s = "Dz"
# Hint: https://techlife.cookpad.com/entry/2018/12/25/110240
s == s.upcase or
s == s.downcase or puts "Hello world"
-----
.......................................................................................................................
2019-05-04 07:09:22 +0900
Extra 3
2019-05-04 07:09:22 +0900
........
-----
def say\
s = 'Small'
t = 'world'
puts "#{s} #{t}"
end
TracePoint.new(:line){|tp|
tp.binding.local_variable_set(:s, 'Hello')
tp.binding.local_variable_set(:t, 'Ruby')
tp.disable
}.enable(target: method(:say))
say
-----
.....
-----
def say
s %= 'Small'
t = 'world'
puts "#{s} #{t}"
end
TracePoint.new(:line){|tp|
tp.binding.local_variable_set(:s, 'Hello')
tp.binding.local_variable_set(:t, 'Ruby')
tp.disable
}.enable(target: method(:say))
say
-----
....................................................................................................................................................................................................................
2019-05-04 07:59:10 +0900
Raw
solv.rb
CODES = {}
CODES["Example"] = <<'EOS'
def foo
"Hello world" if
false
end
puts foo
EOS
CODES["Problem 1-1"] = <<'EOS'
# Hint: Use Ruby 2.6
puts "#{"Goodbye" .. "Hello"} world"
EOS
CODES["Problem 1-2"] = <<'EOS'
puts&.then {
# Hint: &. is a safe
# navigation operator
"Hello world"
}
EOS
CODES["Problem 1-3"] = <<'EOS'
include Math
# Hint: the most beautiful equation
Out, *,
Count = $>,
$<, E ** (2 * PI)
Out.puts("Hello world" *
Count.abs.round)
EOS
CODES["Problem 2-1"] = <<'EOS'
def say
-> {
"Hello world"
}
# Hint: you should call the Proc.
yield
end
puts say { "Goodbye world" }
EOS
CODES["Problem 2-2"] = <<'EOS'
e = Enumerator.new do |g|
# Hint: Enumerator is
# essentially Fiber.
yield "Hello world"
end
puts e.next
EOS
CODES["Problem 2-3"] = <<'EOS'
$s = 0
def say(n = 0)
$s = $s * 4 + n
end
i, j, k = 1, 2, 3
say i
say j
say k
# Hint: Binary representation.
$s != 35 or puts("Hello world")
EOS
CODES["Problem 3-1"] = <<'EOS'
def say s="Hello", t:'world'
"#{ s }#{ t } world"
end
# Hint: Arguments in Ruby are
# difficult.
puts say :p
EOS
CODES["Problem 3-2"] = <<'EOS'
def say s, t="Goodbye "
# Hint: You can ignore a warning.
s = "#{ s } #{ t }"
t + "world"
end
puts say :Hello
EOS
CODES["Problem 3-3"] = <<'EOS'
def say
"Hello world" if
false && false
# Hint: No hint!
end
puts say
EOS
CODES["Extra 1"] = <<'EOS'
Hello = "Hello"
# Hint: Stop the recursion.
def Hello
Hello() +
" world"
end
puts Hello()
EOS
CODES["Extra 2"] = <<'EOS'
s = ""
# Hint: https://techlife.cookpad.com/entry/2018/12/25/110240
s == s.upcase or
s == s.downcase or puts "Hello world"
EOS
CODES["Extra 3"] = <<'EOS'
def say
s = 'Small'
t = 'world'
puts "#{s} #{t}"
end
TracePoint.new(:line){|tp|
tp.binding.local_variable_set(:s, 'Hello')
tp.binding.local_variable_set(:t, 'Ruby')
tp.disable
}.enable(target: method(:say))
say
EOS
require 'timeout'
CHARS =
('0'..'9').to_a +
('a'..'z').to_a +
('A'..'Z').to_a +
%w( ! ? # % & | + - * / ^ ' . , < > = ~ $ @ _ " : ` \\ ; ) +
[' ', "\n", "Dz"]
CODES.each do |name, code|
puts
puts "#{name}"
puts Time.now
(0...code.length).each do |i|
putc '.'
CHARS.each do |char|
code_inserted = code.clone.insert(i, char)
File.open("code.rb", "w") { |f| f.puts(code_inserted) }
begin
Timeout.timeout(1) do
result = `ruby code.rb 2>/dev/null`
if result == "Hello world\n"
puts
puts '-----'
puts code_inserted
puts '-----'
end
end
rescue Timeout::Error
end
end
end
puts
puts Time.now
end
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.