Tag：Difference
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Time：2021-7-31
Write in front Thank you all for working hard at the front end. I hope HelloWorld will be better in the future. thankLet’s see how smart front-end children’s shoes are anti-theftAuthor’s sharing Thank you for stopping the network for a day and finally recovering dried food Let’s share two pictures first1) Wang’s anger2) Procedural ape […]
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Time：2021-7-28
The pain of comparing data I wonder if you are like me. When writing code happily, you must compare some database data. Admittedly, there are general data differences. For example, the content of each line is different. There are relatively mature comparison tools such as compare2 in the market. However, if each column of the […]
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Time：2021-7-28
Similarities: Is to create a new table difference Create table as just copies the original data. In fact, it is to create a table from the query results Create table like generates the same table structure as the source table, including index and primary key. The data needs to be copied in with insert into […]
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Time：2021-7-24
preface Today, I’d like to share with you the Holy Grail layout and the double wing layout and the difference between them. These two three line layouts have always been the high-frequency test points for front-end interviews of some large factories. I’ll take you into the interview questions of large factories. I won’t say much […]
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Time：2021-7-22
There is a difference between proxy and gateway, but the difference is vague. If you have to, you can understand it as follows: A proxy connects two or more applications that use the same protocol. The gateway connects two or more endpoints using different protocols and acts as a “protocol converter”
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Time：2021-7-20
Original link: go letcode, author: San Jin and his meow PHP code Two sum Given an integer array nums and a target value target, please find the two integers in the array whose target value is sum and return their array subscripts.Example: Given nums = [2, 7, 11, 15], target = 9 Because nums [0] […]
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Time：2021-7-18
Title: input the root node of a binary tree to determine whether the tree is a balanced binary tree. If the depth difference between the left and right subtrees of any node in a binary tree is less than 1, then it is a balanced binary tree. Thinking:Use an auxiliary function to calculate the depth […]
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Time：2021-7-18
1. Introduction Data is priceless, MySQL as a database system, its backup is also very important and necessary. There are thousands of reasons for backup, such as failure prevention, security requirements, rollback, audit, delete and change requirements, etc. the importance of backup is self-evident. In addition to the backup itself,How to use backup to recoverService […]
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Time：2021-7-16
preface After working for a period of time, the biggest feeling is that the algorithm seems to be useless. It really doesn’t work. The algorithm can also be competent for ordinary work, but it always feels that there is something missing, so I recently took the time to review the previous brushLeetcodeHope to find a […]
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Time：2021-7-16
The pain of comparing data I don’t know if you are the same as me. When you write code happily, you have to do some data comparison work in the database. It is true that there are general data differences, such as the content of each line. There are mature comparison tools such as compare2 […]
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Time：2021-7-13
Concurrent programming The use of multithread class What are the methods of java thread synchronization and their advantages and disadvantages What is the difference between synchronized and reentrant lock? What’s the use of ThreadLocal How many ways to create threads in Java? namely? When the main thread finishes, will the child thread continue to execute? […]
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Time：2021-7-6
Recently, I changed from Yii, which has been used for more than two years, to yii2. After reading the official documents, I found that two interesting new functions, each() and batch(), are attributed to DB. After reading the source code, I wrote some humble opinions. Let’s look at the source code first. Both the each() […]
