Lightweight, fixed-size, cyclic value buffer
npm install nanobuffer[![NPM Version][npm-image]][npm-url]
[![NPM Downloads][downloads-image]][downloads-url]
A lightweight, fixed-size value buffer.
Essentially it's an array that will only store up to N-number of values. Any additional values added
overwrite the oldest values. You can iterate over the buffer to pull all of the values back out.
npm i nanobuffer --save
``js
import NanoBuffer from 'nanobuffer';
const buffer = new NanoBuffer(20);
for (let i = 0; i < 5; i++) {
buffer.push(Value ${i});
}
console.log(buffer.size); // 5
for (let i = 5; i < 100; i++) {
buffer.push(Value ${i});
}
console.log(buffer.size); // 20
for (const value of buffer) {
console.log(value); // Value XX
}
`
#### new NanoBuffer(maxSize=10)
Creates a new NanoBuffer instance with the specified max size. Default max size is 10.
#### maxSize Number
Gets or sets a maximum number of values that can be stored in the buffer. If you shrink the size,
only the last N values will be preserved.
The value must be an integer and greater than or equal to zero. A value of zero will not buffer
anything.
`js
const buffer = new NanoBuffer;
console.log(buffer.maxSize); // 10
buffer.maxSize = 20;
console.log(buffer.maxSize); // 20
`
#### size Number
Gets the number of values in the buffer. This will never exceed the maxSize.
`js
const buffer = new NanoBuffer;
console.log(buffer.size); // 0
buffer.push('hi');
buffer.push('there');
console.log(buffer.size); // 2
`
#### push(value)
Adds a value to the buffer. If the buffer is full, then the oldest value is overwritten with this
new value.
Values being stored can be any data type.
Returns the NanoBuffer instance.
`js`
const buffer = new NanoBuffer;
buffer
.push('hello')
.push(123)
.push({ foo: 'bar' });
#### clear()
Removes all values in the buffer.
Returns the NanoBuffer instance.
`js
const buffer = new NanoBuffer;
buffer.push('hi');
console.log(buffer.size); // 1
buffer.clear();
console.log(buffer.size); // 0
`
#### [Symbol.iterator]()
Returns an iterator that can be used in a for-of loop.
`js
const buffer = new NanoBuffer;
buffer.push('hi');
buffer.push('there');
for (const value of buffer) {
console.log(value);
}
const it = buffer[Symbol.iterator]();
let r = it.next();
while (!r.done) {
console.log(r.value);
r = it.next();
}
``
MIT
[npm-image]: https://img.shields.io/npm/v/nanobuffer.svg
[npm-url]: https://npmjs.org/package/nanobuffer
[downloads-image]: https://img.shields.io/npm/dm/nanobuffer.svg
[downloads-url]: https://npmjs.org/package/nanobuffer