javaScript-3常用函數

<!DOCTYPE html>
<html>

<head>
  <table>常用函數</table>
  <meta charset="utf-8">
</head>

<body>
  <h1>Array 數組</h1>
  原始數據： <sapn id="originalArray"></sapn><br />
  slice(1,3) 索引1,2的數據: <span id="sliceoriginalArray"></span><br />
  sort 排序: <span id="sortoriginaArray"></span><br />

  <h1>--時間--</h1>
  當前時間：<span id="spnCurrentDate"></span><br />
  指定時間：<span id="spnTempDate"></span><br />

  <h1>Math 對象用于執行數學任務</h1>
  math.random 隨機數 0-1之間<span id="spnRandom"></span><br />
  math.round(9.8) 把一個數字舍入為最接近的整數之間<span id="spnRound"></span><br />
  math.ceil(9.1) 對一個數進行上舍入:<span id="spnCeil"></span><br />
  math.floor(9.8) 返回小于等于x的最大整數:<span id="spnFloor"></span><br />
  math.PI 圓周率<span id="spnPI"></span><br />
  計算eval("2+2*3"):<span id="spnEval"></span>
</body>

<script type="text/javascript">
  var originalArrays = new Array();
  originalArrays[0] = "馬超";
  originalArrays[1] = "趙云";
  originalArrays[2] = "劉備";
  originalArrays[3] = "黃忠";
  originalArrays[4] = "張飛";
  originalArrays[5] = "關羽";

  //Date
  var currentDate = new Date();
  document.getElementById("spnCurrentDate").innerText = currentDate;
  var tempDate = new Date();
  tempDate.setFullYear(2028, 08, 08);
  tempDate.setHours(08, 08, 08);
  document.getElementById("spnTempDate").innerText = tempDate;

  var sliceoriginalArrays = originalArrays.slice(1, 3);
  var sortoriginaArrays = JSON.parse(JSON.stringify(originalArrays)).sort()

  document.getElementById("originalArray").innerText = originalArrays.toString();
  document.getElementById("sliceoriginalArray").innerText = sliceoriginalArrays.toString();
  document.getElementById("sortoriginaArray").innerText = sortoriginaArrays.toString();


  document.getElementById("spnRandom").innerText = Math.random();
  document.getElementById("spnRound").innerText = Math.round(9.8);
  document.getElementById("spnCeil").innerText = Math.ceil(9.1);
  document.getElementById("spnFloor").innerText = Math.floor(9.8);
  document.getElementById("spnPI").innerText = Math.PI;
  document.getElementById("spnEval").innerHTML = eval("2+2*3");
</script>

</html>
posted @ 2022-09-26 00:09 怪圣卡杰閱讀(24) 評論(0) 收藏舉報
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javaScript-3常用函數

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