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/*!
 * array-unique <https://github.com/jonschlinkert/array-unique>
 *
 * Copyright (c) 2014-2015, Jon Schlinkert.
 * Licensed under the MIT License.
 */

'use strict';

module.exports = function unique(arr) {
  if (!Array.isArray(arr)) {
    throw new TypeError('array-unique expects an array.');
  }

  var len = arr.length;
  var i = -1;

  while (i++ < len) {
    var j = i + 1;

    for (; j < arr.length; ++j) {
      if (arr[i] === arr[j]) {
        arr.splice(j--, 1);
      }
    }
  }
  return arr;
};

module.exports.immutable = function uniqueImmutable(arr) {
  if (!Array.isArray(arr)) {
    throw new TypeError('array-unique expects an array.');
  }

  var arrLen = arr.length;
  var newArr = new Array(arrLen);

  for (var i = 0; i < arrLen; i++) {
    newArr[i] = arr[i];
  }

  return module.exports(newArr);
};