JavaScript 中的 TypedArray.indexOf() 函数
TypedArray 对象的 indexOf() 函数接受一个值,并验证类型化数组是否包含指定元素。如果是,则此函数返回找到指定元素的数组索引,如果元素多次出现,则此函数将返回其中的第一个索引。如果数组不包含指定的元素,则 indexOf() 函数返回 -1。
语法
其语法如下
typedArray.indexOf(50)
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, 66, 97, 66 ]); document.write("Contents of the typed array: "+int32View); document.write("<br>"); var contains = int32View.indexOf(66); document.write("Specified element occurred at the index: "+contains); </script> </body> </html>
输出
: Contents of the typed array: 21,19,65,21,14,66,87,55 Specified element occurred at the index: 5
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, 66, 97, 66 ]); document.write("Contents of the typed array: "+int32View); document.write("<br>"); var contains = int32View.indexOf(634); document.write("Specified element occurred at the index: "+contains); </script> </body> </html>
输出
: Contents of the typed array: 21,19,65,21,14,66,87,55 Specified element occurred at the index: -1
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