JavaScript DataView.getInt16() 是 dataView 中的一個內置方法。它用於在指定位置獲取帶符號的 16 位整數(短)數。
注意:16 位整數值的範圍是從 0 到 65,535(無符號整數值)和從 ?32,768 到 32,767(有符號整數值)。
用法
dataview.getInt16(byteOffset)
參數
byteoffset: 從讀取數據的視圖開始的偏移量,以字節為單位。
返回值
此方法返回一個帶符號的 16 位整數。
瀏覽器支持
Chrome | 9 |
Safari | 5.1 |
Firefox | 15 |
Opera | 12.1 |
例子1
<script>
//JavaScript to illustrate dataview.getInt16() method
// creating a ArrayBuffer
var JavaTpoint = new ArrayBuffer(8);
// creating a view
var arr = new DataView(JavaTpoint);
// put the value 3.1 at slot 1
document.write("If we give a float value then output will be an Integer<br><br>");
arr.setInt16(1,3.1);
document.write(arr.getInt16(1));
//expected output:3
</script>
輸出:
If we give a float value then output will be an Integer 3
例子2
<script>
//JavaScript to illustrate dataview.getInt16() method
// if there is no data to be stored then it returns Nan
// creating a ArrayBuffer
var JavaTpoint = new ArrayBuffer(8);
// creating a view
var arr = new DataView(JavaTpoint);
// NO Data
arr.getInt16(1);
document.write(" If there is no data to be stored, then Output will Be:<br><br>")
document.write(arr.getInt16(1));
//expected output:0
</script>
輸出:
If there is no data to be stored, then Output will Be: 0
例子3
<script>
//JavaScript to illustrate dataview.getInt16() method
// creating a ArrayBuffer
var JavaTpoint = new ArrayBuffer(8);
// creating a view
var arr = new DataView(JavaTpoint);
//We can also use math function like Math.PI
document.write("PI value will be <br><br>");
arr.setInt16(1,Math.PI);
document.write(arr.getInt16(1));
//expected output:3
</script>
輸出:
PI value will be 3
示例 4
<script>
//JavaScript to illustrate dataview.getInt16() method
// creating a ArrayBuffer
var JavaTpoint = new ArrayBuffer(8);
// creating a view
var arr = new DataView(JavaTpoint);
// put the value 7 at slot 1
arr.setInt16(1,7);
document.write("If we provide Integer value then output will be<br><br>")
document.write(arr.getInt16(1));
//expected output:7
</script>
輸出:
If we provide Integer value then output will be. 7
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注:本文由純淨天空篩選整理自 JavaScript DataView.getInt16() method。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。