Get your own Node server Result Size: 625 x 565
let buf1 = Buffer.from('a');
let buf2 = Buffer.from('b');
let buf3 = Buffer.from('c');
let arr = [buf1, buf2, buf3];

//Join the array into one buffer object:
let buf = Buffer.concat(arr);
console.log(buf);

              
<Buffer 61>, <Buffer 62>, <Buffer 63>