JavaScript中的TypedArray.findIndex()函数
find()TypedArray的函数接受表示函数名称的字符串值，测试数组中的元素是否通过提供的函数实现的测试，如果是，则返回通过测试的第一个元素的索引，否则返回-1。
语法
其语法如下
typedArray.findIndex(function_name)
示例
<html>
<head>
<title>JavaScript Array every Method</title>
</head>
<body>
<script type="text/javascript">
var int32View = new Int32Array([21, 19, 65,21, 14, 66, 87, 55 ]);
document.write("Contents of the typed array: "+int32View);
document.write("<br>");
function testResult(element, index, array) {
var ele = element>35
return ele;
}
result = int32View.findIndex(testResult);
document.write("Result: "+result);
</script>
</body>
</html>输出结果
Contents of the typed array: 21,19,65,21,14,66,87,55 Result: 2
示例
<html>
<head>
<title>JavaScript Array every Method</title>
</head>
<body>
<script type="text/javascript">
var int32View = new Int32Array([21, 19, 65,21, 14, 66, 87, 55 ]);
document.write("Contents of the typed array: "+int32View);
document.write("<br>");
function testResult(element, index, array) {
var ele = element>100
return ele;
}
result = int32View.findIndex(testResult);
document.write("Result: "+result);
</script>
</body>
</html>输出结果
Contents of the typed array: 21,19,65,21,14,66,87,55 Result: -1
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