1  var baseRange = require('./_baseRange'),
 2      isIterateeCall = require('./_isIterateeCall'),
 3      toFinite = require('./toFinite');
 4  
 5  /**
 6   * Creates a `_.range` or `_.rangeRight` function.
 7   *
 8   * @private
 9   * @param {boolean} [fromRight] Specify iterating from right to left.
10   * @returns {Function} Returns the new range function.
11   */
12  function createRange(fromRight) {
13    return function(start, end, step) {
14      if (step && typeof step != 'number' && isIterateeCall(start, end, step)) {
15        end = step = undefined;
16      }
17      // Ensure the sign of `-0` is preserved.
18      start = toFinite(start);
19      if (end === undefined) {
20        end = start;
21        start = 0;
22      } else {
23        end = toFinite(end);
24      }
25      step = step === undefined ? (start < end ? 1 : -1) : toFinite(step);
26      return baseRange(start, end, step, fromRight);
27    };
28  }
29  
30  module.exports = createRange;