lottie-web/player/js/utils/pooling/pooling.js

After Effects plugin for exporting animations to SVG + JavaScript or canvas + JavaScript

import {
  createSizedArray,
} from '../helpers/arrays';

const pooling = (function () {
  function double(arr) {
    return arr.concat(createSizedArray(arr.length));
  }

  return {
    double: double,
  };
}());

export default pooling;