shallow = [[1,2,3]] * 3
shallow[1][1] = 0
shallow # [[1, 0, 3], [1, 0, 3], [1, 0, 3]]
deep = [[1,2,3 ] for f in [1,2,3]]
deep[1][1] = 0
deep # [[1, 2, 3], [1, 0, 3], [1, 2, 3]]

// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package main

import "fmt"

// Send the sequence 2, 3, 4, ... to channel 'ch'.
func generate(ch chan int) {
    for i := 2; ; i++ {
        ch <- i  // Send 'i' to channel 'ch'.
    }
}

// Copy the values from channel 'in' to channel 'out',
// removing those divisible by 'prime'.
func filter(in, out chan int, prime int) {
    for {
        i := <-in  // Receive value of new variable 'i' from 'in'.
        if i % prime != 0 {
            out <- i  // Send 'i' to channel 'out'.
        }
    }
}

// The prime sieve: Daisy-chain filter processes together.
func main() {
    ch := make(chan int)  // Create a new channel.
    go generate(ch)  // Start generate() as a goroutine.
    for i := 0; i < 100; i++ { // Print the first hundred primes.
        prime := <-ch
        fmt.Println(prime)
        ch1 := make(chan int)
        go filter(ch, ch1, prime)
        ch = ch1
    }
}

p = Pool(2)
p.map(answer, problems)

express allot
cd allot
npm install -d

// Routes

app.get('/', function(req, res){
  res.render('index', {
    title: 'Express'
  });
});

app.get('/json', function(req, res){
  var allotment_data = [
    {name:"なにもうえてない",  x:10,  y:10,  width:480, height:120, color:"#CCCCCC"},
    {name:"浅葱",  x:10,  y:140,  width:140, height:120, color:"#66CC66"},
    {name:"ニンニク",  x:160,  y:140,  width:80, height:120, color:"#993300"},
    {name:"春菊",  x:250,  y:140,  width:80, height:120, color:"#339933"},
    {name:"ジャガイモ",  x:340,  y:140,  width:150, height:120, color:"#CC6600"},
    {name:"ソラマメ",  x:10,  y:340,  width:70, height:150, color:"#339933"},
    {name:"エンドウ",  x:10,  y:270,  width:70, height:60, color:"#339933"},
    {name:"ジャガイモ",  x:90,  y:270,  width:400, height:110, color:"#CC6600"},
    {name:"ミョウガ",  x:90,  y:390,  width:400, height:100, color:"#CC9966"}
  ];

  res.send(JSON.stringify(allotment_data));
});

h1= title
canvas#allotment(width=500, height=500)
script(type="text/javascript", src="http://jashkenas.github.com/coffee-script/extras/coffee-script.js")
script(type="text/javascript", src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js")
script(type="text/coffeescript")
  | draw = () ->
  |   $.getJSON('/json', (data) -> drawCanvas(data))
  | 
  | drawCanvas = (allotment_data) ->
  |   ctx = document.getElementById('allotment').getContext('2d')
  |   ctx.save()
  |   ctx.font = "20px"
  |   for alt in allotment_data
  |     ctx.fillStyle = alt.color
  |     ctx.fillRect( alt.x, alt.y, alt.width, alt.height)
  |     ctx.fillStyle = "#000"
  |     ctx.fillText(alt.name, 12 + alt.x, 32 + alt.y)
  |   ctx.restore()
  | 
  | draw()

script.jeditable
  $(".editable_textarea").editable("#{title}", { 
      type   : 'textarea',
      submitdata: { _method: "post" },
      name     : 'body',
      loadurl  : '/md/' + "#{title}",
      rows     : 10,
      submit : 'OK',
      cancel : 'cancel',
      cssclass : "editable"
  });

app.get('/md/:title', function(req, res){
  WikiContent.findOne({title: req.params.title}, function (err, content) {
    res.send(content.body);
  });
});