queue-pool

Queue-Pool

Pool works as queue or stack.

Queue-Pool Is pool of elements, implements major Array methods. With ability to auto-adjust length.

Why?

If you handle a group of incoming streams of chunks, process them in a pool, there is a need to release them in stack or queue order.

Getting Started

npm install queue-pool

Usage

import QPool from "queue-pool";

const qpool = new QPool(options);

options

• init for custom initialize, instead of empty string as default.
• maxIn a number, for max size allowed in pool. Default is 2.

Methods

• get
• length
• elementsSize an array contains size of each element in the pool.
• elementsLength a number of elements in.
• flush
• unshift
• push
• shift
• pop

• process push and adjust the size.

  process(input, type, cb)

  • type: stack or queue. Default is queue.
  • cb(get): optional.

  In case you made several push calls passing the allowed number set in maxIn. It auto shift in case of queue/ pop in case of stack over elements and then push the new one. Using this method you guarantee that you are not passing the number of elements you set.

Example

const qpool = new QPool();
qpool.push("pigs, "); // pigs,
qpool.push("goats, "); // pigs, goats,
qpool.push("sheep."); // pigs, goats, sheep.
qpool.shift(); // goats, sheep.
qpool.pop(); // goats,
qpool.unshift("sheep, "); // sheep, goats,
qpool.elementsLength(); // 2
qpool.elementsSize(); // [7 , 7]
qpool.length(); // 14

with queue

const qpool = new QPool({ maxIn: 5 });
for (let i = 0; i < 10; i++) qpool.push(`${i} `);
qpool.get(); // 0 1 2 3 4 5 6 7 8 9
qpool.process("last-element");
qpool.get(); // 6 7 8 9 last-element

with stack and callback

const qpool = new QPool({ maxIn: 5 });
for (let i = 0; i < 10; i++) qpool.push(`${i} `);
qpool.get(); // 0 1 2 3 4 5 6 7 8 9
qpool.process("last-element", "stack", (get) => {
  console.log(get); //  0, 1, 2, 3 last-element
});

Tests

test

License

This project is licensed under the MIT License

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