uniqBy

_.uniqBy(array, [iteratee=_.identity])

此方法与 _.uniq 类似，不同之处在于它接受 iteratee，调用 array 中的每个元素生成唯一性计算标准。结果值的顺序由它们在数组中出现的顺序决定。迭代器使用一个参数调用：(value)。

¥This method is like _.uniq except that it accepts iteratee which is invoked for each element in array to generate the criterion by which uniqueness is computed. The order of result values is determined by the order they occur in the array. The iteratee is invoked with one argument: (value).

新增于

¥Since

4.0.0

参数

¥Arguments

1. array (数组)：要检查的数组。

   ¥array (Array): The array to inspect.

2. [iteratee=_.identity] (函数)：每个元素调用迭代器。

   ¥[iteratee=_.identity] (Function): The iteratee invoked per element.

返回

¥Returns

(数组)：返回新的重复释放数组。

¥(Array): Returns the new duplicate free array.

示例

¥Example

_.uniqBy([2.1, 1.2, 2.3], Math.floor);
// => [2.1, 1.2]

// The `_.property` iteratee shorthand.
_.uniqBy([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
// => [{ 'x': 1 }, { 'x': 2 }]