Javascript typedArray.includes()用法及代碼示例

typedArray.includes()是JavaScript中的內置函數，用於檢查給定的typedArray是否包含特定元素，並因此返回true和false。句法：

typedarray.includes(Element, Index);

參數：它接受下麵指定的兩個參數-

Element:它是在typedArray中搜索的元素。
Index:它是應該開始搜索的typedArray形式中元素的索引。其默認值為零(0)，並且是可選的。

返回值：如果元素存在於給定的typedArray中，則它返回布爾值true，否則返回false。

JavaScript代碼顯示此函數的工作方式：
代碼1：

<script> 
  
    // Creating some typedArrays 
    const A = new Uint8Array([ 1, 2, 3, 4, 5 ]); 
    const B = new Uint8Array([ 5, 10, 15, 20 ]); 
    const C = new Uint8Array([ 0, 2, 4, 6,, 8, 10 ]); 
    const D = new Uint8Array([ 1, 3, 5, 7, 9 ]); 
  
    // Calling include() function 
    a = A.includes(2) 
    b = B.includes(15, 1) 
    c = C.includes(6) 
    d = D.includes(9, 1) 
  
    // Printing true or false, either the element 
    // is present in the typedArray or not 
    document.write(a + "<br>"); 
    document.write(b + "<br>"); 
    document.write(c + "<br>"); 
    document.write(d); 
  
</script>

輸出：

true
true
true
true

代碼2：

<script> 
  
    // Creating some typedArrays 
    const A = new Uint8Array([ 1, 2, 3, 4, 5 ]); 
    const B = new Uint8Array([ 5, 10, 15, 20 ]); 
    const C = new Uint8Array([ 0, 2, 4, 6,, 8, 10 ]); 
    const D = new Uint8Array([ 1, 3, 5, 7, 9 ]); 
  
    // Calling include() function 
    a = A.includes(6) 
    b = B.includes(21, 1) 
    c = C.includes(6, 4) 
    d = D.includes(0) 
  
    // Printing true or false, either the element 
    // is present in the typedArray or not 
    document.write(a + "<br>"); 
    document.write(b + "<br>"); 
    document.write(c + "<br>"); 
    document.write(d); 
  
</script>

輸出：

false
false
false
false

相關用法

注：本文由純淨天空篩選整理自Kanchan_Ray大神的英文原創作品 JavaScript | typedArray.includes() with Examples。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。