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 。
其语法如下
typedArray.findIndex(function_name)
<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
<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