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Node.js util.types.isUint8ClampedArray()用法及代碼示例

util.types.isUint8ClampedArray()方法是util模塊的內置應用程序編程接口,其主要設計用於滿足Node.js自己的內部API的需求。

util.types.isUint8ClampedArray()方法用於檢查給定值是否為無符號8位鉗位整數數組。

用法:


util.types.isUint8ClampedArray( value )

參數:該函數接受上述和以下描述的單個參數:

  • value:對於無符號的8位鉗位整數數組,將檢查該值。

返回值:它返回一個布爾值,即如果傳遞的值是一個無符號的8位鉗位整數數組,則為true,否則返回false。

以下示例說明了Node.js中的util.types.isUint8ClampedArray()方法:

範例1:

// Node.js program to demonstrate the 
// util.types.isUint8ClampedArray() method 
   
// Import the util module 
const util = require('util'); 
   
// Checking for a unsigned 8-bit 
// clamped integer array 
isUint8ClampedArr = util.types.isUint8ClampedArray( 
                    new Uint8ClampedArray()); 
  
console.log("Object is Unsigned 8-bit clamped array"
                  + " object:", isUint8ClampedArr); 
   
// Checking for a unsigned 8-bit 
// unclamped integer array 
isUint8ClampedArr = util.types.isUint8ClampedArray( 
                    new Uint8Array()); 
  
console.log("Object is Unsigned 8-bit clamped"
                  + " array object:", isUint8ClampedArr); 
   
// Checking for a integer array 
isUint8ClampedArr = util.types.isUint8ClampedArray( 
                  new Int8Array()); 
  
console.log("Object is Unsigned 8-bit clamped "
                  + "array object:", isUint8ClampedArr);

輸出:

Object is Unsigned 8-bit clamped array object:true
Object is Unsigned 8-bit clamped array object:false
Object is Unsigned 8-bit clamped array object:false

範例2:

// Node.js program to demonstrate the 
// util.types.isUint8ClampedArray() method 
   
// Import the util module 
const util = require('util'); 
   
// Checking a big unsigned 64-bit 
// integer array 
let UintClampedArr =  
    new Uint8ClampedArray([0, 128, 1024, 2054]); 
  
console.log(UintClampedArr); 
   
isUint8ClampedArr =  
    util.types.isUint8ClampedArray(UintClampedArr); 
  
console.log("Object is Unsigned 8-bit clamped"
            + " array object:", isUint8ClampedArr); 
   
// Checking a unsigned 32-bit integer array 
let unsigned32Arr = new Uint32Array([4, 25, 128]); 
console.log(unsigned32Arr); 
   
isUint8ClampedArr =  
    util.types.isUint8ClampedArray(unsigned32Arr); 
console.log("Object is Unsigned 8-bit clamped"
            + " array object:", isUint8ClampedArr); 
   
// Checking a big signed 64-bit integer array 
let bigSigned64Arr = new BigInt64Array([16n, 25n, 128n]); 
console.log(bigSigned64Arr); 
   
isUint8ClampedArr =  
    util.types.isUint8ClampedArray(bigSigned64Arr); 
console.log("Object is Unsigned 8-bit clamped"
            + " array object:", isUint8ClampedArr);

輸出:

Uint8ClampedArray [ 0, 128, 255, 255 ]
Object is Unsigned 8-bit clamped array object:true
Uint32Array [ 4, 25, 128 ]
Object is Unsigned 8-bit clamped array object:false
BigInt64Array [ 16n, 25n, 128n ]
Object is Unsigned 8-bit clamped array object:false

參考: https://nodejs.org/api/util.html#util_util_types_isuint8clampedarray_value



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注:本文由純淨天空篩選整理自sayantanm19大神的英文原創作品 Node.js | util.types.isUint8ClampedArray() Method。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。