a2ikm

module Document
  extend ActiveSupport::Concern

  module ClassMethods
    def key(name, type)
      puts "a new key `#{name}` in `#{type}` is declared."
    end
  end
end

a2ikm

#include <stdio.h>

int main(int argc, char **argv) {
  for (int i = 0; i < 4; i++) {
    int j = i;
    printf("&i = %p, &j = %p\n", &i, &j);
  }

  return 0;
}

a2ikm

package main

import "fmt"

func main() {
	for i := 0; i < 4; i++ {
		j := i
		fmt.Printf("&i = %p, &j = %p\n", &i, &j)
	}
}

a2ikm

var showHiddenCommentsButtons = document.getElementsByClassName('Details-content--closed');
for (var i=0; i < showHiddenCommentsButtons.length; i++) {
  showHiddenCommentsButtons[i].click();
}

a2ikm

// Place your key bindings in this file to override the defaults
[
  // cycle tabs in the current group with ctrl+tab and ctrl+shift+tab
  {
      "key": "ctrl+tab",
      "command": "workbench.action.nextEditorInGroup"
  },
  {
      "key": "ctrl+shift+tab",
      "command": "workbench.action.previousEditorInGroup"

a2ikm

class String
  # byte単位で計算されたインデックスを文字単位に変換する。
  # 文字の途中や、範囲外の値が渡されたらnilを返す。
  #                                                                                                    
  def byteindex2charindex(byteindex)
    return 0 if byteindex == 0

    cur = 0
    codepoints.each.with_index(1) do |codepoint, index|
      cur += codepoint.chr(Encoding::UTF_8).bytesize

a2ikm

#!/usr/bin/env ruby

require "csv"

path = ARGV[0]
offset = ARGV[1] ? ARGV[1].to_i : 1

opts = {}
opts[:col_sep] = "\t" if path.end_with?(".tsv")
rows = CSV.read(ARGV[0], opts)

a2ikm

class String
  def nth_index(pattern, n)
    pos = nil
    offset = nil
    begin
      pos = index(pattern, offset || 0)
      return nil if pos.nil?
      n -= 1
      offset = pos + 1
    end while n >= 0

a2ikm

#!/bin/sh

remote="origin"
if git remote | grep fork >/dev/null 2>&1; then
  remote="fork"
fi

branch="$(git rev-parse --abbrev-ref HEAD)"

git push -u $remote $branch

a2ikm

fib = Fiber.new do
  Fiber.yield # y1
  a, b = 1, 1
  while true
    Fiber.yield(a) # y2
    a, b = b, a + b
  end
end

fib.resume # y1まで進める