ramda-adjunct/lib/internal/polyfills/String.repeat.js

Ramda Adjunct is the most popular and most comprehensive set of utilities for use with Ramda, providing a variety of useful, well tested functions with excellent documentation.

"use strict";

exports.__esModule = true;
exports["default"] = void 0;

var _isNotFinite = _interopRequireDefault(require("../../isNotFinite"));

var _isNegative = _interopRequireDefault(require("../../isNegative"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }

var repeat = function repeat(value, count) {
  var validCount = Number(count);

  if (validCount !== count) {
    validCount = 0;
  }

  if ((0, _isNegative["default"])(validCount)) {
    throw new RangeError('repeat count must be non-negative');
  }

  if ((0, _isNotFinite["default"])(validCount)) {
    throw new RangeError('repeat count must be less than infinity');
  }

  validCount = Math.floor(validCount);

  if (value.length === 0 || validCount === 0) {
    return '';
  } // Ensuring validCount is a 31-bit integer allows us to heavily optimize the
  // main part. But anyway, most current (August 2014) browsers can't handle
  // strings 1 << 28 chars or longer, so:
  // eslint-disable-next-line no-bitwise


  if (value.length * validCount >= 1 << 28) {
    throw new RangeError('repeat count must not overflow maximum string size');
  }

  var maxCount = value.length * validCount;
  validCount = Math.floor(Math.log(validCount) / Math.log(2));
  var result = value;

  while (validCount) {
    result += value;
    validCount -= 1;
  }

  result += result.substring(0, maxCount - result.length);
  return result;
};

var _default = repeat;
exports["default"] = _default;