Common sorting algorithms and their code implementation and related problems

Algorithm learning notes - sorting This is a part of the notes that have been sorted out recently in the learning process. There is no picture demonstration. For more vivid display, please see this Daniel's sorting blog. Animation demonstration of sorting algorithm Some common array sorting metho ...

Posted on Sat, 22 Feb 2020 04:41:10 -0500 by kurdishvoice

taro realizes shopping cart logic

taro realizes shopping cart logic What is taro? Taro is a multi terminal development solution that follows the React syntax specification. Nowadays, there are various forms on the market, such as Web, react native, wechat applet and so on. When the business requirements are expressed in different e ...

Posted on Sat, 22 Feb 2020 04:35:58 -0500 by clown[NOR]

spring boot -- an example of file upload and download

As for file upload and download, there are many better components that encapsulate in place for us now, and there are few things we need to do in practice. But here we will introduce the file upload based on the Commons file upload component and the file download based on the file stream. File upload ...

Posted on Sat, 22 Feb 2020 04:35:15 -0500 by dscuber9000

jsp to realize simple picture verification code (after login to realize the query database function)

1, Functional analysis of implementation (1) The function of adding the verification code on the landing page plays a certain security role. The login can be realized only when the correct verification code, user name and password are entered. (2) Realize the function of querying database. In the page ...

Posted on Sat, 22 Feb 2020 04:34:39 -0500 by exoduses

Definition and use of Java learning notes

1, Method definition In many cases, it is possible to execute some code repeatedly. Methods are also called function s in some books. It should be noted that there is a precondition for this method definition: the method is defined in the main class and directly called by the main method. Basic defi ...

Posted on Sat, 22 Feb 2020 04:17:30 -0500 by ast3r3x

Detailed tutorial of Django connecting Mongodb (using mongoengine)

1, Understand MongoDB database? Introduction: MongoDB is written by C + + language. It is an open source database system based on distributed file storage. It is a document oriented database. It is JSON like data format, free and flexible. Advantages: scalable clustering, mass data storage, fast q ...

Posted on Sat, 22 Feb 2020 04:06:55 -0500 by liro

014A link aggregation

Article directory Background: Two layer Ethernet link aggregation Three layer link aggregation Background: With the continuous expansion of the network scale, users put forward higher and higher requirements for the bandwidth and reliability of the backbone link. In traditional technology, high- ...

Posted on Sat, 22 Feb 2020 03:30:53 -0500 by mark_nsx

Getting started with Flask

Catalog 1, Architecture introduction 1. What is Flask? 2, Flask form operation 3, What is flask Sqlalchemy? 1. How to configure the database? 2. Define model 3. Model column type 4. Model column properties 5. Data query 6. Paging implementation 7. Flask migrate database migration 1. Model ...

Posted on Sat, 22 Feb 2020 02:50:54 -0500 by Nulletz

Sql Server Proc

CREATE PRoc [Name] { @parameter Data type, @parameter data type OUTPUT[input] } AS begin select INSERT UPDATE (SQL) end --Basic statement fast --These are statement Libraries --Let's see the one without parameters first. It can take parameters or not (I haven't used the one without parameters several times, of course) --Get a table. It fee ...

Posted on Sat, 22 Feb 2020 02:42:30 -0500 by behrk2

Using double large initialization in java

scene When using pol TL to operate word, the following code is used to initialize Map In the above initialization method, two braces {}} are used, which seems strange. In fact, this is a combination of anonymous inner classes and instantiated code blocks Instantiate code block First look at an inte ...

Posted on Sat, 22 Feb 2020 02:37:54 -0500 by walexman