dropRight.js

var baseSlice = require('../internal/baseSlice'),
    isIterateeCall = require('../internal/isIterateeCall');

/**
 * Creates a slice of `array` with `n` elements dropped from the end.
 *
 * @static
 * @memberOf _
 * @category Array
 * @param {Array} array The array to query.
 * @param {number} [n=1] The number of elements to drop.
 * @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
 * @returns {Array} Returns the slice of `array`.
 * @example
 *
 * _.dropRight([1, 2, 3]);
 * // => [1, 2]
 *
 * _.dropRight([1, 2, 3], 2);
 * // => [1]
 *
 * _.dropRight([1, 2, 3], 5);
 * // => []
 *
 * _.dropRight([1, 2, 3], 0);
 * // => [1, 2, 3]
 */
function dropRight(array, n, guard) {
  var length = array ? array.length : 0;
  if (!length) {
    return [];
  }
  if (guard ? isIterateeCall(array, n, guard) : n == null) {
    n = 1;
  }
  n = length - (+n || 0);
  return baseSlice(array, 0, n < 0 ? 0 : n);
}

module.exports = dropRight;