{"id":102266,"date":"2021-11-03T09:00:49","date_gmt":"2021-11-03T03:30:49","guid":{"rendered":"https:\/\/data-flair.training\/blogs\/?p=102266"},"modified":"2021-11-10T11:59:11","modified_gmt":"2021-11-10T06:29:11","slug":"nodejs-buffers","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/nodejs-buffers\/","title":{"rendered":"Nodejs Buffers"},"content":{"rendered":"

Today we will be discussing Nodejs buffers and their properties in detail with code and examples.<\/p>\n

Nodejs Buffers:<\/h3>\n

It is an area of memory present outside the v8 javascript engine. It is of fixed size. This is like an array where each item is in bytes.<\/p>\n

Why use a buffer in Nodejs?<\/h3>\n

Normally we deal with string data types but in order to deal with binary data types efficiently we have to use buffer.<\/p>\n

Creating Buffers in Nodejs:<\/h3>\n

In order to store something on buffer we have to first create a buffer. Below are different ways for creating Buffer:<\/p>\n

1. Creating a buffer of size 10 octets which is not initialised<\/p>\n

Syntax:<\/strong><\/p>\n

var buf = Buffer.alloc(10);<\/pre>\n
2. Creating buffer for the given array<\/p>\n
Syntax:<\/strong><\/p>\n
var buf = Buffer.from([10, 20, 30, 40, 50]);<\/pre>\n
3. Creating buffer for the given string with encoding:<\/p>\n
Syntax:<\/strong><\/p>\n
var buf = Buffer.from(\"DataFlair\", \"utf-8\");<\/pre>\n
Writing to Buffers in Nodejs:<\/h3>\n
Now we will look at how to store our data in a buffer. Below syntax shows how we can write to a buffer.<\/p>\n
Syntax:<\/strong><\/p>\n
buf.write(string[, offset][, length][, encoding])<\/pre>\n
Parameter:<\/h4>\n