Class Buffer

Allocate a fixed-size byte array memory to the Buffer object.

Obtains the buffer object byte array, which can be the original content or a copy. Do not modify the return value directly. Use the slice method to modify the original content.

Copy the bytes in the specified range [sourceStart, sourceEnd) of the buffer object to the range [target,] of the target buffer object,

Ensure that the memory space of the target buffer object is sufficient.

Example

import * as buffer from 'buffer';

let source = buffer.from("1234567890");

let target = buffer.empty();
target.alloc(3);
source.copy(target, 0, 5, 8);

console.log(target.toString()); // 678
Copy

Check whether two buffer objects are equal. The comparison principle is to compare the two buffer objects by byte array.

Obtains the byte value at a specified position of a Buffer object.

Deprecated

Use the bytes method.

Sets the byte value at the specified position of the buffer object.

Obtains the size of the buffer object byte array.

From a slice interval [start, end) of the Buffer object, and returns a new Buffer object. Note that the new Buffer object shares the underlying byte array memory with the original Buffer object.

Example

import * as buffer from 'buffer';

let buf = buffer.from("1234567890");
let slice = buf.slice(5, 8);

console.log(buf.toString()); // 1234567890
console.log(slice.toString()); // 678

slice.set(1, 65);

console.log(buf.toString()); // 123456A890
console.log(slice.toString()); // 6A8
Copy

Converts the buffer object byte array to a character string.