Programmer Think

meaning of the title Look directly at the topic, it's not descriptive Sol Consider violent practices First, the shortest path from $1 to each node is preprocessed. For each question, the violent BFS takes $min from the point it can walk to. Consider how to optimize, using Kruskal refactoring tree here We constructed a Kruskal refactoring ...

1. String Class 1.String classes are not mutable, that is, after a String object is declared 2.java.lang.String; is a string type (1) Once a string is created, it can no longer be changed, "abc" string object cannot be changed to "abcd" once it is created. (2) Enhance string access efficiency: Cache technology is used in the ...

The bottom navigation bar should be the most commonly used display mode of mainstream apps. I personally think the bottom navigation bar is the most clear and intuitive, generally 4-5 is the best way. Here I made a little thing, that is, when I click a tab, it automatically highlights and changes the icon, so that the overall f ...

Using GlusterFS in Kubernetes ( https://www.gluster.org/ There are endpoint (external storage) and heketi (k8s built-in GlusterFS service).This article focuses on using endpoint to set up GlusterFS storage for use in JupyterHub for K8s.For simplicity, install using the default JupyterHub helm.According to the Quick Setup JupyterHub for K8s Afte ...

Download MySQL installation [root@localhost ~]# cd /home/data/ [root@localhost data]# ls get-docker.sh nginx-1.10.1 nginx-1.10.1.tar.gz redis-5.0.3 redis-5.0.3.tar.gz server-jre-8u131-linux-x64.tar.gz zookeeper-3.4.10.tar.gz [root@localhost data]# wget https://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm If prompted ...

Knative provides a flexible implementation mechanism for auto-scaling. This paper gives you an in-depth understanding of the implementation mechanism of KPA auto-scaling from the dimension of "three horizontal and two vertical".Allows you to easily control Knative AutoZoom. Note: This article is based on code interpretation of the lat ...

The partitioner of MapReduce is HashPartitionerPrinciple: first, hash the key output from the map, then reduce the number of tasks on the module. According to the result, determine the output kv pair, which is taken by the matching reduce task.Custom partition needs to inherit the Partitioner and copy the getpariton() methodCustom partition cl ...

https://www.cnblogs.com/onepixel/p/7674659.html This article is nice https://www.bilibili.com/video/av685670?from=search&seid=1637373535603658338 This motion picture is excellent https://www.icourse163.org/course/ZJU-93001 MOOC Zhejiang Big Data Structure Chen Yue and He Qin-ming Bubble sort, select sort, insert sort are the three slowest ...

1. Install Redis image docker pull yyyyttttwwww/redis 2. Create net2 network segment docker network create --subnet=172.19.0.0/16 net2 3 create a node Redis container #Rename the redis image: docker tag docker.io/yyyyttttwwww/redis redis #Delete old redis docker rmi docker.io/yyyyttttwwww/redis #Create 6 redis containe ...

New prefix tree*/ 1. Define data structure: 26 child nodes of the root node, optional, which word letter is indicated by index 2. Create a new insert. If the root node is empty, return it directly. If the string to be inserted is empty, set the value of the current tree node to the given value (there are two situations when the ...