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Node.js Buffer.concat() Method

❮ Buffer Module


Join three buffer objects into one:

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

var buf = Buffer.concat(arr);
Run example »

Definition and Usage

The concat() method joins all buffer objects in an array into one buffer object.


 Buffer.concat(arr, length);

Parameter Values

Parameter Description
arr Required. The array of buffers to concat
length Optional. Specifies the length of the concatenated buffer

Technical Details

Return Value: A Buffer
Node.js Version: 0.7.11

❮ Buffer Module