Redis list [4] - quicklist of data structure

1. Overview As mentioned earlier, before version 3.2 of Redis, ziplist was used to store under 512 small integers and short strings of under 64 bytes, while linkedlist was used to store other data. However, due to the relatively high additional space of the linked list, prev and next pointers take up 16 bytes (the 64 bit system pointer is 8 b ...

Posted on Wed, 20 May 2020 06:41:39 -0400 by hafez

Java Experiment 4 -- employee information management system

preface Time: Two 0 Two 0.5.18 Note: I haven't typed the code seriously for a long time. I started to move myself when I finished a search of addition, deletion and modification subject Realization ideas I'm afraid that the repetition rate of homework is too high, so I won't put it up first~ ...

Posted on Tue, 19 May 2020 10:27:48 -0400 by sigkill-9

SQL Server 2008 delete large amount of data

1, Write it in the front. - it's not easy to say love you In order to upgrade the database to SQL Server 2008 R2, an existing PC was used for testing. The database was restored from the official database (the size of three databases is exaggerated to 100G +), and the machine memory is only 4G, so it not only has to assume the role of DB Se ...

Posted on Tue, 19 May 2020 03:59:16 -0400 by [L3]sPARTAN

The solution of change exchange problem in Python algorithm

Change exchange problem solving We usually go out to buy goods. When we pay at the store, if we want to change, we don't want the salesperson to get back a pile of change. It's very inconvenient to store it. Especially when we buy goods on the vending machine, we find that the vending machine is very intelligent now. When we don't change for yo ...

Posted on Mon, 18 May 2020 03:15:46 -0400 by ilovetoast

Spring MVC advanced functional programming

1. Preface Last right Functional interface programming of Spring MVC A simple introduction, so that many students do not know the new operation. There is also a reaction that this kind of writing seems to be less pleasing than the traditional writing method, but in fact, everyone is the same. But we should dare to try new things. Java Lambada ...

Posted on Sun, 17 May 2020 21:59:11 -0400 by jacomus

Java learning path: day19 multithreading 2

Article catalog Reprinted from atguigu.com video Chapter 8 multithreading Thread life cycle Synchronization of threads Thread safety problem of implementing Runnable by synchronous code block processing Synchronous code block processing Thread safety problem of inheriting Thread class Synchronous m ...

Posted on Sun, 17 May 2020 21:30:25 -0400 by ycoleman

Data Structure and Algorithms in JavaScript Version--Foundation

This is a sequel to the previous one. Data Structure and Algorithms in JavaScript Version--Basic (1) This article was first published on a personal blog Data Structure and Algorithms in JavaScript Version--Basic (2) Thank you for pointing out any errors aggregate A collection is made up of an unordered and unique set of items. Unorde ...

Posted on Sun, 17 May 2020 20:10:02 -0400 by fareedreg

12:pnp4nagios Custom Template Drawing for Nagios Monitoring

The article is summarized from the instructions on the official website: http://docs.pnp4nagios.org/pnp-0.6/tpl In daily use, it is unavoidable to find that the default drawing does not meet our needs, so you can customize the template to achieve the desired drawing effect according to your needs. 1. Official description of custom templates 1. ...

Posted on Sun, 17 May 2020 13:39:02 -0400 by mysql_query

Leetcode:NO.25 K flip list

subject Topic link: https://leetcode-cn.com/problems/reverse-nodes-in-k-group Give you a list, each k nodes a group to flip, please return to the flipped list. k is a positive integer whose value is less than or equal to the length of the list. If the total number of nodes is not an integral multiple of k, keep the last remaining nodes in ...

Posted on Sun, 17 May 2020 10:28:20 -0400 by velkymx

Software Design Mode Learning Responsibility Chain Mode

If there are multiple objects in the system that can process the same request, the responsibility chain pattern can be used to link the objects that process the request to form a chain along which the request can be passed.Processing if the object in the chain can handle the request, otherwise forwarding the request to the next person Mo ...

Posted on Sat, 16 May 2020 23:53:49 -0400 by bsarika