lodash/concat.js

import arrayConcat from './_arrayConcat';
import baseFlatten from './_baseFlatten';
import isArray from './isArray';
import rest from './rest';

/**
 * Creates a new array concatenating `array` with any additional arrays
 * and/or values.
 *
 * @static
 * @memberOf _
 * @category Array
 * @param {Array} array The array to concatenate.
 * @param {...*} [values] The values to concatenate.
 * @returns {Array} Returns the new concatenated array.
 * @example
 *
 * var array = [1];
 * var other = _.concat(array, 2, [3], [[4]]);
 *
 * console.log(other);
 * // => [1, 2, 3, [4]]
 *
 * console.log(array);
 * // => [1]
 */
var concat = rest(function(array, values) {
  if (!isArray(array)) {
    array = array == null ? [] : [Object(array)];
  }
  values = baseFlatten(values);
  return arrayConcat(array, values);
});

export default concat;