kana

<?php

function test_copy_on_write()
{
    print "test_copy_on_write\n";

    $a = 100;
    xdebug_debug_zval('a');
    //==> a: (refcount=1, is_ref=0)=100

kana

<?php
$a = 1;
debug_zval_dump($a);
//==> long(1) refcount(2)
// Novice: Huh? Why is refcount 2? The value is only pointed by $a, so refcount must be 1!
// Tatsujin: PHP uses copy-on-write. The value is passed by value to debug_zval_dump.
//           It doesn't modify the passed value. The value is shared by $a and debug_zval_dump.
//           Therefore refcount is 2.

kana

#!/bin/bash

colors=256
fps=30
half=

while true
do
  case "$1" in
    '-c')

kana

const bodyParser = require('body-parser')
const express = require('express')
const moment = require('moment-timezone')
const slack = require('slack')

const VERIFICATION_TOKEN = process.env.VERIFICATION_TOKEN
const OAUTH_ACCESS_TOKEN = process.env.OAUTH_ACCESS_TOKEN

const app = express()

kana

aaa

kana

# Original PDF:
# 1. Front cover
# 2. content 1
# 3. content 2
# 4. ...
# 5. content -2
# 6. content -1
# 7. Back cover
#
# Resulting PDF:

kana

#!/bin/bash

if ! [ "$#" = 1 ]
then
  echo "Usage: $0 FILE"
  exit 1
fi

d="$(identify "$1" | cut -d' ' -f3)"
width="${d/x*/}"

kana

Algorithm	Card set	Times	Elapsed	Note
A-Res	FG only	100k	18,741ms	Acceptable speed for small card set
A-Chao	FG only	100k	8,561ms	Broken probability
Uniform	FG only	100k	8,145ms	Current implementation
A-Chao	All	100k	11,215ms	Broken probability
Uniform	All	100k	11,774ms	Current implementation
A-Res / sort	All	100k	163,021ms	Simple implementation but heavy
A-Res / heap(A)	All	100k	31,068ms	Push all cards then pop N cards
A-Res / heap(W)	All	100k	23,028ms	The same as described in Wikipedia

kana

font=~/Library/Fonts/MyFavoriteFont.ttf
icon=apple-touch-icon.png

convert \
  -background transparent \
  -size 980x640 \
  \( \
    -background transparent -fill white \
    -font "$font" \
    -gravity center \

kana

convert m.png -gravity west -resize 3840x2160 -extent 10x ,left.png
convert m.png -gravity east -resize 3840x2160 -extent 40x ,right.png
convert \
  \( ,left.png -gravity west -resize '2160x2160!' -blur 0x20 \) \
  \( m.png -gravity center -resize '3840x2160' \) \
  \( ,right.png -gravity east -resize '2160x2160!' -blur 0x20 \) \
  +append ,base.png
convert ,base.png -gravity center -extent 3840x2160 -quality 90 ,t.jpg