过滤器的本质是函数。当模板内置的过滤器不能满足需求，可以自定义过滤器。自定义过滤器有两种实现方式：

Given an array of integers that is already sorted in ascending order, find two numbers such that they add up to a specific target number.

Given a non-empty string s and a dictionary wordDict containing a list of non-empty words, add spaces in s to construct a sentence where each word is a valid di...

Given a non-negative integer num, repeatedly add all its digits until the result has only one digit.

Given a sorted positive integer array nums and an integer n, add/patch elements to the array such that any number in range [1, n] inclusive can be formed by the...

Given an integer array with all positive numbers and no duplicates, find the number of possible combinations that add up to a positive integer target.

You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order and each of their nodes contain a single...

BE 节点的扩容和缩容过程，不影响当前系统运行以及正在执行的任务，并且不会影响当前系统的性能。数据均衡会自动进行。根据集群现有数据量的大小，集群会在几个小时到1天不等的时间内，恢复到负载均衡的状态。...

参考官方文档http://doris.apache.org/master/zh-CN/installing/install-deploy.html#%E6%89%A9%E5%AE%B9%E7%BC%A9%E5%AE%B9

1、简述dispatch_source是基础数据类型，用于协调特定底层系统事件的处理。dispatch_source替代了异步回调函数，来处理系统相关的事件，当配置一个dispatch时，你需要指定监测的事件、dispatch queue、以及处理事件的代码(bl...