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/** * @name arrayChunk * @summary Split T[] into T[][] based on the defind size * @description * Returns a set ao arrays based on the chunksize * @example * <BR> * * ```javascript * import { arrayChunk } from 'https://deno.land/x/polkadot@0.2.40/util/mod.ts'; * * arrayChunk([1, 2, 3, 4, 5]); // [[1, 2], [3, 4], [5]] * ``` */export function arrayChunk <T> (array: T[], chunkSize: number): T[][] {  const outputSize = Math.ceil(array.length / chunkSize);
  // shortcut for the single-split case  if (outputSize === 1) {    return [array];  }
  const output = Array<T[]>(outputSize);
  for (let i = 0; i < outputSize; i++) {    const offset = i * chunkSize;
    output[i] = array.slice(offset, offset + chunkSize);  }
  return output;}