@lskjs/log/utils/leftPad.js

Логгер совмещающий лучшие черты morgan, winston, bunyan, logrus. debug. Базируется на debug-level.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = void 0;
exports.leftPad = leftPad;

/* eslint-disable */
var cache = ['', ' ', '  ', '   ', '    ', '     ', '      ', '       ', '        ', '         '];

function leftPad(str, len, ch) {
  // convert `str` to `string`
  str = "".concat(str); // `len` is the `pad`'s length now
  //

  var reverse = 0;

  if (len < 0) {
    len *= -1;
    reverse = 1;
  }

  len -= str.length; // doesn't need to pad

  if (len <= 0) return str; // `ch` defaults to `' '`

  if (!ch && ch !== 0) ch = ' '; // convert `ch` to `string`

  ch = "".concat(ch); // cache common use cases

  if (ch === ' ' && len < 10) return reverse ? str + cache[len] : cache[len] + str; // `pad` starts with an empty string

  var pad = ''; // loop

  while (true) {
    // add `ch` to `pad` if `len` is odd
    if (len & 1) pad += ch; // divide `len` by 2, ditch the remainder

    len >>= 1; // "double" the `ch` so this operation count grows logarithmically on `len`
    // each time `ch` is "doubled", the `len` would need to be "doubled" too
    // similar to finding a value in binary search tree, hence O(log(n))

    if (len) ch += ch; // `len` is 0, exit the loop
    else break;
  } // pad `str`!


  return reverse ? str + pad : pad + str;
}

var _default = leftPad;
exports["default"] = _default;
//# sourceMappingURL=leftPad.js.map