higuma

# internal: generate permutation recursively
generatePermutation = (perm, pre, post, n) ->
  if n > 0
    for i in [0...post.length]
      rest = post.slice 0
      elem = rest.splice i, 1
      generatePermutation perm, pre.concat(elem), rest, n - 1
  else
    perm.push pre
  return

higuma

// JavaScript Array permutation generator
// (optimized from CoffeeScript output: see ArrayPermutation.coffee)
(function() {
  var generatePermutation = function(perm, pre, post, n) {
    var elem, i, rest, len;
    if (n > 0)
      for (i = 0, len = post.length; i < len; ++i) {
        rest = post.slice(0);
        elem = rest.splice(i, 1);
        generatePermutation(perm, pre.concat(elem), rest, n - 1);

higuma

run Rack::Directory.new '.'

higuma

source 'https://rubygems.org'
ruby 2.0.0
gem 'rack'

higuma

a = for x in [0..5]
  x * x
console.log a   # => [ 0, 1, 4, 9, 16, 25 ]

b = while a.length > 0
  a.pop()
console.log b   # => [ 25, 16, 9, 4, 1, 0 ]

higuma

require 'set'
require 'mathn'

module Alphametics
  def solve(puzzle)
    puzzle = puzzle.upcase
    words = puzzle.scan /[A-Z]+/
    chars = Set.new words.join.each_char
    abort 'Too many letters' if chars.size > 10
    first_chars = Set.new words.select {|w| w.size > 1 }.map {|w| w[0] }

higuma

This is *emphasized*

higuma

use Rack::ETag
use Rack::Deflater
use Rack::Static, urls: [''], root: 'public', index: 'index.html'
run lambda {|env|}    # run proc {|env|} も可

higuma

Accept-Encoding: gzip, deflate

higuma

<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">

<!-- Optional theme -->
<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap-theme.min.css">

<!-- Latest compiled and minified JavaScript -->
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>