主题
findLast
js
_.findLast(collection, [predicate=_.identity], [fromIndex=collection.length-1])
此方法与 _.find
类似,不同之处在于它从右到左迭代 collection
的元素。
¥This method is like _.find
except that it iterates over elements of collection
from right to left.
新增于
¥Since
2.0.0
参数
¥Arguments
collection
(数组|对象):要检查的集合。¥
collection
(Array|Object): The collection to inspect.[predicate=_.identity]
(函数):每次迭代调用的函数。¥
[predicate=_.identity]
(Function): The function invoked per iteration.[fromIndex=collection.length-1]
(数值):要从中搜索的索引。¥
[fromIndex=collection.length-1]
(number): The index to search from.
返回
¥Returns
(*):返回匹配的元素,否则为 undefined
。
¥()*: Returns the matched element, else undefined
.
示例
¥Example
js
_.findLast([1, 2, 3, 4], function(n) {
return n % 2 == 1;
});
// => 3