ListExtension<T> extension

on

Properties

firstOrNull → T?: Available on List<T>, provided by the ListExtension extension
获取列表的第一个元素，如果为空则返回null
no setter
isEmptyOrNull → bool: Available on List<T>, provided by the ListExtension extension
判断列表是否为空
no setter
isNotEmptyOrNull → bool: Available on List<T>, provided by the ListExtension extension
判断列表是否不为空
no setter
lastOrNull → T?: Available on List<T>, provided by the ListExtension extension
获取列表的最后一个元素，如果为空则返回null
no setter
random → T?: Available on List<T>, provided by the ListExtension extension
获取列表中的随机元素
no setter
safeCopy → List<T>: Available on List<T>, provided by the ListExtension extension
安全的列表操作，避免并发修改异常
no setter
shuffled → List<T>: Available on List<T>, provided by the ListExtension extension
随机打乱列表
no setter
unique → List<T>: Available on List<T>, provided by the ListExtension extension
获取列表中的唯一元素
no setter

chunk(int size) → List<List<T>>: Available on List<T>, provided by the ListExtension extension
将列表分割成指定大小的子列表
distinct() → List<T>: Available on List<T>, provided by the ListExtension extension
列表去重
getOrNull(int index) → T?: Available on List<T>, provided by the ListExtension extension
获取指定索引的元素，如果索引越界则返回null
groupBy<K>(K keySelector(T)) → Map<K, List<T>>: Available on List<T>, provided by the ListExtension extension
对列表进行分组
indexesOf(T element) → List<int>: Available on List<T>, provided by the ListExtension extension
查找元素的所有索引
paginate(int pageNum, int pageSize) → List<T>: Available on List<T>, provided by the ListExtension extension
对列表进行分页
safeReplace(int index, T newElement) → List<T>: Available on List<T>, provided by the ListExtension extension
安全的元素替换
whereNotNull() → List<T>: Available on List<T>, provided by the ListExtension extension
移除空元素（针对可空类型）