ramda/src/range.js

A practical functional library for JavaScript programmers.

var _curry2 = /*#__PURE__*/require("./internal/_curry2.js");
var _isNumber = /*#__PURE__*/require("./internal/_isNumber.js");
/**
 * Returns a list of numbers from `from` (inclusive) to `to` (exclusive).
 *
 * @func
 * @memberOf R
 * @since v0.1.0
 * @category List
 * @sig Number -> Number -> [Number]
 * @param {Number} from The first number in the list.
 * @param {Number} to One more than the last number in the list.
 * @return {Array} The list of numbers in the set `[a, b)`.
 * @example
 *
 *      R.range(1, 5);    //=> [1, 2, 3, 4]
 *      R.range(50, 53);  //=> [50, 51, 52]
 */
var range = /*#__PURE__*/_curry2(function range(from, to) {
  if (!(_isNumber(from) && _isNumber(to))) {
    throw new TypeError('Both arguments to range must be numbers');
  }
  var result = Array(from < to ? to - from : 0);
  var finish = from < 0 ? to + Math.abs(from) : to - from;
  var idx = 0;
  while (idx < finish) {
    result[idx] = idx + from;
    idx += 1;
  }
  return result;
});
module.exports = range;