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Node.js Buffer.compare() 方法

❮ Buffer 模块


示例

检查两个缓冲区对象是否相等

var buf1 = Buffer.from('abc');
var buf2 = Buffer.from('abc');
var x = Buffer.compare(buf1, buf2);
console.log(x);

var buf1 = Buffer.from('a');
var buf2 = Buffer.from('b');
var x = Buffer.compare(buf1, buf2);
console.log(x);

var buf1 = Buffer.from('b');
var buf2 = Buffer.from('a');
var x = Buffer.compare(buf1, buf2);
console.log(x);
运行示例 »

定义和用法

compare() 方法比较两个缓冲区对象并返回一个数字,定义它们的差异

如果它们相等则返回 0
如果 buf1 大于 buf2 则返回 1
如果 buf1 小于 buf2 则返回 -1

此方法可用于对包含缓冲区的数组进行排序。


语法

 Buffer.compare(buf1, buf2);

参数值

参数 描述
buf1 必需。一个 Buffer
buf2 必需。一个 Buffer

技术细节

返回值 一个数字 (-1、0 或 1)
Node.js 版本 0.11.13

更多示例

示例

使用 Buffer.compare() 对缓冲区数组进行排序

var buf1 = Buffer.from('b');
var buf2 = Buffer.from('c');
var buf3 = Buffer.from('a');
var arr = [buf1, buf2, buf3];

//排序前的数组
console.log(arr);

//对数组进行排序
console.log(arr.sort(Buffer.compare));
运行示例 »

❮ Buffer 模块

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