主题
lastIndexOf
js
_.lastIndexOf(array, value, [fromIndex=array.length-1])
此方法与 _.indexOf
类似,不同之处在于它从右到左迭代 array
的元素。
¥This method is like _.indexOf
except that it iterates over elements of array
from right to left.
新增于
¥Since
0.1.0
参数
¥Arguments
array
(数组):要检查的数组。¥
array
(Array): The array to inspect.value
(*):要搜索的值。¥
value
()*: The value to search for.[fromIndex=array.length-1]
(数值):要从中搜索的索引。¥
[fromIndex=array.length-1]
(number): The index to search from.
返回
¥Returns
(数值):返回匹配值的索引,否则为 -1
。
¥(number): Returns the index of the matched value, else -1
.
示例
¥Example
js
_.lastIndexOf([1, 2, 1, 2], 2);
// => 3
// Search from the `fromIndex`.
_.lastIndexOf([1, 2, 1, 2], 2, 2);
// => 1