include函数_include（）函数以及JavaScript中的示例

include函数

includes() is a predefined function in JavaScript, which is used to check whether a given element exists in the array or not?

include()是JavaScript中的预定义函数，用于检查数组中是否存在给定元素？

Example:

例：

<html>
<head>
<title>JavaScipt Example</title>
</head>
<body>
<script>
//array
var cities = ["New Delhi", "Mumbai", "Chennai", "Banglore"];
//checking whether "New Delhi" exists or not
if(cities.includes("New Delhi")==true)
document.write("New Delhi exists in the array");
else
document.write("New Delhi does not exist in the array");
document.write("<br>");
//checking whether "Pune" exists or not
if(cities.includes("Pune")==true)
document.write("Pune exists in the array");
else
document.write("Pune does not exist in the array");
document.write("<br>");
</script>
</body>
</html>

Output

输出量

New Delhi exists in the array
Pune does not exist in the array

翻译自: https://www.includehelp.com/code-snippets/includes-function-with-example-in-javascript.aspx

include函数

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