BcRikko

var Counter = (function () {
  function Counter() {
    var _this = this;
    this.countUp = function () {
      _this.count++;
      alert(_this.count);
    };
    this.countDown = function () {
      _this.count--;
      alert(_this.count);

BcRikko

using System;

// 角度が30°の場合
var angle = 30;
var sin = Math.Sin(angle * (Math.PI / 180));
var cos = Math.Cos(angle * (Math.PI / 180));
var tan = Math.Tan(angle * (Math.PI / 180));

//"Sin:0.5, Cos:0.87, Tan:0.58"  ※少数第二位で四捨五入
Console.WriteLine("Sin:{0}, Cos:{1}, Tan:{2}", sin, cos, tan);

BcRikko

$(function () {
  var indexedDB = window.indexedDB;
  var db = null;
  var request = indexedDB.open('library', 1);
  request.onupgradeneeded = function (event) {
    db = event.target.result;
    var store = db.createObjectStore('books', { keyPath: 'isbn' });
    store.createIndex('index', 'isbn', false);
  };
  request.onsuccess = function (event) {