1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556
/** * @author: lencx * @create_at: Jun 14, 2020 */
/** * @method fmtFileSize * @param {number} bytes * @param {boolean} bits - enables bit sizes, default is `false` * @param {number} dp - decimal place, default is `2` * @see https://stackoverflow.com/questions/10420352/converting-file-size-in-bytes-to-human-readable-string/10420404 */export function fmtFileSize(bytes: number, bit: boolean = false, dp: number = 2) {  const thresh: number = bit ? 1000 : 1024;  if (bytes <= 0) {    return '0 B';  }  if (Math.abs(bytes) < thresh) {    return bytes + ' B';  }  const units = bit    ? ['KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB']    : ['KiB', 'MiB', 'GiB', 'TiB', 'PiB', 'EiB', 'ZiB', 'YiB'];  let u = -1;  const r = 10**dp;  do {    bytes /= thresh;    ++u;  } while (Math.round(Math.abs(bytes) * r) / r >= thresh && u < units.length - 1);  return `${bytes.toFixed(dp)} ${units[u]}`;}
export const isStr = (arg: any): boolean => typeof arg === 'string';
// exists directory or fileexport const exists = async (filename: string): Promise<boolean> => {  try {    await Deno.stat(filename);    return true;  } catch (e) {    return false;  }}
// https://stackoverflow.com/questions/190852/how-can-i-get-file-extensions-with-javascriptexport const fileExt = (fname: string): string => fname.slice((fname.lastIndexOf('.') - 1 >>> 0) + 2);
// example: './a/b/' => 'a/b'export const trimPath = (path: string): string => {  // example: './a/b/' => './a/b'  if (/\/$/.test(path)) path = path.slice(0, -1);  // example: './a/b' => 'a/b'  if (/^\.\//.test(path)) path = path.slice(2);  return path;}