node . js | util . types . is initit 64 array()方法
原文:https://www . geesforgeks . org/node-js-util-types-is initit 64 array-method/
util.types.isBigInt64Array()方法是 util 模块的内置应用编程接口,用于对 node.js 中的 BigInt64Array 进行类型检查。
语法:
util.types.isBigInt64Array( 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 and can be of any data type.
返回值:它返回一个布尔值,即如果该值是 BigInt64Array,则为真,否则为假。
下面的例子说明了在 Node.js 中使用 util . types . is initit 64 array()方法:
例:
// Node.js program to demonstrate the
// util.types.isBigInt64Array() Method
// Allocating util module
const util = require('util');
// Functions to be passed as parameter
// of utiltypes.isBigInt64Array() method
var v1 = new BigInt64Array();
var v2 = new BigUint64Array();
// Printing the returned value from
// util.types.isBigInt64Array() method
console.log(util.types.isBigInt64Array(v1));
console.log(util.types.isBigInt64Array(v2));
输出:
true
false
例:
// Node.js program to demonstrate the
// util.types.isBigInt64Array() Method
// Allocating util module
const util = require('util');
// Functions to be passed as parameter of
// utiltypes.isBigInt64Array() method
var v1 = new BigInt64Array();
var v2 = new BigUint64Array();
// Calling util.types.isBigInt64Array() method
if(util.types.isBigInt64Array(v1))
console.log("The passed value is a BigInt64Array.");
else
console.log("The passed value is not a BigInt64Array");
if(util.types.isBigInt64Array(v2))
console.log("The passed value is a BigInt64Array.");
else
console.log("The passed value is not a BigInt64Array");
输出:
The passed value is a BigInt64Array.
The passed value is not a BigInt64Array
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 _ is iguing 64 array _ value
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