_.reverse(array)

34

_.reverse(array)

_.reverse将数组反转顺序，此方法会改变原数组

参数

array (Array): 需要修改的数组

返回值

(Array): 返回被反转了顺序的原数组

例子

var array = [1, 2, 3];
 
_.reverse(array);
// => [3, 2, 1]
 
console.log(array);
// => [3, 2, 1]

源代码：

/**
 * lodash 4.0.1 (Custom Build) <https://lodash.com/>
 * Build: `lodash modularize exports="npm" -o ./`
 * Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2016 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <https://lodash.com/license>
 */

/** Used for built-in method references. */
var arrayProto = Array.prototype;

/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeReverse = arrayProto.reverse;

/**
 * Reverses `array` so that the first element becomes the last, the second
 * element becomes the second to last, and so on.
 *
 * **Note:** This method mutates `array` and is based on
 * [`Array#reverse`](https://mdn.io/Array/reverse).
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Array
 * @param {Array} array The array to modify.
 * @returns {Array} Returns `array`.
 * @example
 *
 * var array = [1, 2, 3];
 *
 * _.reverse(array);
 * // => [3, 2, 1]
 *
 * console.log(array);
 * // => [3, 2, 1]
 */
//将数组反转顺序，此方法会改变原数组
function reverse(array) {
  return array ? nativeReverse.call(array) : array;//调用原生的Array.prototype.reverse方法反转数组顺序
}

module.exports = reverse;