node . js util . types . isayarrayborfer()方法

原文:https://www . geeksforgeeks . org/node-js-util-types-is anaryraybuffer-method/

util . types . IsYArrayBuffer()方法是 util 模块的内置应用编程接口，用于对 node.js 中的任何内置 arrayBuffer 对象执行类型检查。

语法:

util.types.isAnyArrayBuffer( value )

参数:该方法接受如上所述的单个参数，如下所述:

• Value: It is a required parameter of any data type.

返回值:返回布尔值，即如果值是内置的 SharedArrayBuffer 或 ArrayBuffer 对象，则为真，否则为假。

下面的例子说明了在 Node.js 中使用 util . types . isayarraybuffer()方法:

例 1:

// Node.js program to demonstrate the   
// util.types.isAnyArrayBuffer() Method 

// Allocating util module
const util = require('util');

// Printing the returned value from
// util.types.isAnyArrayBuffer() method
console.log(util.types.isAnyArrayBuffer(new ArrayBuffer()));
console.log(util.types.isAnyArrayBuffer(new SharedArrayBuffer()));
console.log(util.types.isAnyArrayBuffer(12));
console.log(util.types.isAnyArrayBuffer("geeksforgeeks"));

输出:

true
true
false
false

例 2:

// Node.js program to demonstrate the   
// util.types.isAnyArrayBuffer() Method 

// Allocating util module
const util = require('util');

// Printing the returned value from 
// util.types.isAnyArrayBuffer() method
if (util.types.isAnyArrayBuffer(new ArrayBuffer())) {
    console.log("Passed value is either built in "
        + "ArrayBuffer or SharedArrayBuffer ");
}
if (util.types.isAnyArrayBuffer(new SharedArrayBuffer())) {
    console.log("Passed value is either built in "
        + "ArrayBuffer or SharedArrayBuffer ");
}

输出:

Passed value is either built in ArrayBuffer or SharedArrayBuffer
Passed value is either built in ArrayBuffer or SharedArrayBuffer

注意:以上程序使用node filename.js命令编译运行。

参考:https://nodejs . org/API/util . html # util _ util _ types _ isayarybuffer _ value

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