Buffer.concat(list[, totalLength])

list <Buffer[]> | <Uint8Array[]> 要合并的 Buffer 数组或 Uint8Array 数组。

totalLength 合并后 list 中的 Buffer 实例的总长度。

返回:

var buf1=Buffer.alloc(10,0); var buf2=Buffer.alloc(11,0); var buf3=Buffer.alloc(5,0); var len=buf1.length+buf2.length+buf3.length; console.log(`len:${len}`);//26 const bufA=Buffer.concat([buf1,buf2,buf3],len); console.log(bufA); //<Buffer 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00> console.log(bufA.length); //26

nodejs_buffer.concat

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