Deep analysis of Map source code

preface map set is the set of key value The difference between HashMap and HashTable HashMap is thread unsafe. HashTable is read and write with synchronized lock. It is thread safe and inefficient. Hashtab cannot store null key and value. HashMap can store null key and value in the first position of ...

Posted on Wed, 24 Jun 2020 22:22:38 -0400 by thomasadam83

SQL Mathematical Functions, String Functions for Programmers

Article Directory Preface 1. Mathematical Functions 1.1 ABS 1.2 CEIL 1.3 FLOOR 1.4 MOD 1.5 RAND 1.6 ROUND 1.7 TRUNCATE 1.8 POW 2. String Functions 2.1 CHAR_LENGTH and LENGTH 2.2 CONCAT 2.3 INSERT 2.4 LOWER and UPPER 2.5 LEFT and RIGHT 2.6 REPLACE 2.7 TRIM 2.8 SUBSTRING 2.9 LOCATE,POSITION,INSTR 2. ...

Posted on Wed, 24 Jun 2020 12:55:28 -0400 by xgab

JavaScript common API collection summary

This chapter includes DOM operation, CSS operation, Object (Object object Object, Array Object, Number Object, String Object, Math Object, JSON Object and Console Object) operation, which is worth collecting.1, Node 1.1 node properties Node.nodeName //Return node name, read-only Node.nodeType //Retu ...

Posted on Wed, 24 Jun 2020 03:48:24 -0400 by phaseonemedia

UnityStandardAsset project, source code analysis_ 2_ Racing game [player control]_ Vehicle core control

Address of the previous chapter: UnityStandardAsset project, source code analysis_ 1_ Racing game [player control]_ input system In the previous chapter, we learned the general process of vehicle control, and analyzed the input system, that is, those classes were called during the process from the play ...

Posted on Wed, 24 Jun 2020 02:35:42 -0400 by noirsith

The new colleague "optimizes" the if else with the strategy mode. The technical director said: can you think about it and then change it?

This article comes from the author's contribution, the original author: God loves apples At present, shell house hunting is my employer in Mordor. I usually focus on some java related technologies. I hope you can find something useful in this article. Personal level is limited. If there is any error in the article, please point it out and commu ...

Posted on Wed, 24 Jun 2020 01:01:04 -0400 by storyboo

Front End Learning Records 3-HTML

Front End Learning Records 3-HTML list Unordered list ul-li Differences between Tables and Unordered Tables Ordered List ol-li Custom List dl-dt-dd form input control Selectlist control Form label label Do not use for and id methods in label tags textarea control form Form Field (Write the necessa ...

Posted on Tue, 23 Jun 2020 20:49:52 -0400 by Leppy

Unity StanderShader Series 1 -- forwardbase source code analysis

Source code analysis of unity standershaderforwardbase Article catalog Source code analysis of unity standershaderforwardbase Vertex Processing Input structure - VertexInput Output structure - vertex output forwardbase Vertex function -vertForwardBase VertexGIForward tangentToWorldAndPackedData ...

Posted on Tue, 23 Jun 2020 03:34:24 -0400 by RobM

Learn the basics of Java

What I bring you today is the basic knowledge of Java, including the basic syntax of Java, such as Java, variables, constants, data types, operators, various selection structures, loop structures, arrays, etc!!! The content and steps are super detailed, with source code of various cases (you can directly use O(∩)_ ∩)O~)!!! After readin ...

Posted on Tue, 23 Jun 2020 00:58:05 -0400 by toms

c language book management system

I. Purpose By designing a program of the book management system, we can make full use of the main knowledge points of the course, consolidate the understanding of modular program design and file operation, and improve the software programming ability. 2. Points of knowledge involved Loops, branching sta ...

Posted on Mon, 22 Jun 2020 21:15:22 -0400 by theblacksheep

Understanding of volatile and code demonstration

    Volatile is a lightweight synchronization mechanism provided by java virtual machine. It has three major features: ensuring visibility, not atomicity, and prohibiting instruction rearrangement. Before you want to understand volatile, you must first understand the running principle of J ...

Posted on Sun, 21 Jun 2020 06:17:13 -0400 by nealios