Programmer Think

Service startup process: Tcp warp: 1.Tcp warp is managed by xinetd 2. support libwarp.so module service: we can use ldd to view ldd `which sshd` vim /etc/hosts.deny ALL:ALL ###Everyone refused to connect vim /etc/hosts.al ...

My LeetCode: https://leetcode-cn.com/u/ituring/ My LeetCode source code [GitHub]: https://github.com/izhoujie/Algorithmcii LeetCode 912. Sort array subject Give you an array of integers, nums, in ascending order. Example 1: Input: nums = [5,2,3,1] Output: [1,2,3,5] Example 2: Input: nums = [5,1,1,2,0,0] Output: [0,0,1,1,2,5] Tips: 1 <= ...

Preface: In the process of project development, we usually have the demand of "paging load". Paging load is to display data in the form of list. On the premise of having a network, we can manually obtain more data through pull-down refresh. When there is no more data, we will be reminded that we do not have more data.     & ...

Catalog Experimental topology Experiment steps and configuration ip configuration Configure ospf and loopback address experimental result Experimental topology Experiment steps and configuration ip configuration RA # sysname RA # interface GigabitEthernet0/0/0 ip address 10.1.1.1 255.255.255. ...

Before, I have done the communication under the LAN. I found that I couldn't use the two computers on different LAN. I always want to realize something that can communicate in Wan! So there's this little project! Implementation ideas: Technology concept Usage method test result Code Implementation ideas: ...

Step introduction: Code resolution: Step introduction: Add dependencies for Retrofit2 and RxJava2 libraries: Create a class that accepts the data returned by the server (the class used to process the data) Create an interface to describe network requests and configure network request parameters Create Retrofit inst ...

Analysis of Volley framework Recently, I am learning the Volley framework and recording my income. On the one hand, it is convenient for me to communicate with you, and on the other hand, it is convenient for me to review in the future. If there is something wrong, please correct it. In the future, we will update and i ...

Talk about it casually In fact, GCD has been contacted by all of us, and we are not explaining what GCD is. Why do we suddenly want to talk about the semaphore problem? In recent interviews, when I asked the interviewers how to deal with a series of operations after multiple requests are completed, some said to create a temporary variable to do ...

Description: There is a map of n × mn × m. every position on the map can be air ground, turret or enemy. You need to manipulate the turret to eliminate the enemy. For each turret, there is a direction it can aim at. You need to determine its attack position in its aim direction, and if it can not attack, on ...

Problem phenomenon Business level The power of the computer room is cut off abnormally, and the access of the business system is slow after the database is restored. Database level Check the instance and find that only one instance is open and the other instance is not started. RAC cluster level View CR ...