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Front-end Vue3 actual combat [handwritten vue project]

Course2857

Course Introduction：Course introduction: 1. Cross-domain processing, token management, route interception; 2. Real interface debugging, API layer encapsulation; 3. Secondary encapsulation of Echarts and paging components; 4. Vue packaging optimization and answers to common problems.

APIPOST tutorial [Popularization of technical concepts related to network communication]

Course1795

Course Introduction：Apipost is an API R&D collaboration platform that integrates API design, API debugging, API documentation, and automated testing. It supports grpc, http, websocket, socketio, and socketjs type interface debugging, and supports privatized deployment. Before formally learning ApiPost, you must understand some related concepts, development models, and professional terminology. Apipost official website: https://www.apipost.cn

Issue 22_Comprehensive actual combat

Course5521

Course Introduction：(Consult WeChat: phpcn01) The comprehensive practical course aims to consolidate the learning results of the first two stages, achieve flexible application of front-end and PHP core knowledge points, complete your own projects through practical training, and provide guidance on online implementation. Comprehensive practical key practical courses include: social e-commerce system backend development, product management, payment/order management, customer management, distribution/coupon system design, the entire WeChat/Alipay payment process, Alibaba Cloud/Pagoda operation and maintenance, and project online operation. .....

Issue 22_PHP Programming

Course5172

Course Introduction：(Consult WeChat: phpcn01) Starting from scratch, you can solve conventional business logic, operate MySQL with PHP to add, delete, modify, and query, display dynamic website data, master the MVC framework, master the basics of the ThinkPHP6 framework, and learn and flexibly master all knowledge involved in PHP development. point.

Issue 22_Front-end development

Course8713

Course Introduction：(Consult WeChat: phpcn01) The learning objectives of the front-end development part of the 22nd issue of PHP Chinese website: 1. HTML5/CSS3; 2. JavaScript/ES6; 3. Node basics; 4. Vue3 basics and advanced; 5. Mobile mall/ Website background homepage layout; 6. Automatic calculation of tabs/carousels/shopping carts...

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Update transaction value in mongodb
I'm making a Mern project and I need to update two fields in a mongodb record. I have two fields, one is an array of objects called wallets and the other is transactions. I get an object from the frontend which includes the amount, index of the wallet where the transaction was made, as wallet is an array of objects in mongo. Now I need to subtract the transaction amount from the wallet. How to do this I have written a controller in node.js but it is not doing anything. The object I receive from the frontend if ..transaction={amount:'50'
2023-09-13 19:30:49

Predis executes two commands using transactions, but one of them fails
Description error I'm using a redis list to make a limiter and it works as expected most of the time, but recently I've discovered that there are some keys that don't have an expiration time. Ideally I would "rpush" the values into the list and set the expiry time in a transaction and I would also use "watch" before the transaction starts. This bug is not reproduced in my local environment, even if I use jmeter to batch request related APIs, such as 500 requests per second Version: Prediction: v2.1.2PHP7.4Redis Server 5.0.10 Code Example $redisCl
2023-09-13 17:55:41

Method to find transaction expiry date in related table
I have a taxonomy table with different transaction categories. Each category contains a number of transactions along with their expiry dates. I want to access only those transactions and their categories whose expiry date has not yet expired, but I'm running into an issue where if transactions of a certain category exist within the time range, then all transactions will arrive regardless of whether they have expired or not. This is my code: $deals=DealCategory::where('name','!=','Today's Deal')->whereRelation('deals','sta
2023-09-13 16:19:38

Use shrink wrap flex boxes to wrap flex items so they can be centered
I have a flexbox with packed content. How to shrink a flexbox to its content? The fundamental problem I'm trying to solve is centering the flexbox. This image describes my problem: How can I achieve this goal? Can this be achieved with pure CSS? I don't know in advance whether Flexbox will wrap to column 1, 2 or 3. The width of the element is known. The height would preferably be unknown, but I could decide on a constant height if that was easier. Neither width:min-content, width:max-content, width:fit-cont
2023-09-13 15:26:47

Update using multiple JOINs in MySQL/Python
The first set of questions were deemed too similar to another post (it wasn't) and were closed... so I've made another attempt here, hopefully better worded this time. Some background: We have a relationship here. Securities (coins) + currencies (base coins) form a pair. A pair and a broker form an asset (I treat each broker/pair as a specific asset) and I also have a forex table that stores live currency rates. In my transaction history table (history_price), there is a column that contains a lot of NULL (Euro volume), and I do calculations based on the volume. What I want to do is fill it,
2023-09-12 21:19:12

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Uniswap's total historical transaction volume reaches US$2 trillion

Course Introduction：Decentralized exchange Uniswap has seen its trading volume exceed $2 trillion since its launch five and a half years ago. According to data from DuneAnalytics, Uniswap’s trading volume crossed a significant level on April 5. Before setting the new record, the Uniswap team released a message stating that $2 trillion in trading volume would be reached within 24 hours. UniswapLabs said it will transfer 200 USD tokens (USDC) to the first person to record and send the company a video clip, which updated the DuneAnalytics dashboard to show that Uniswap’s trading volume has exceeded $200 million. DefiLlama data shows that Uniswap is the most popular

2024-04-06 comment 0885

Bitcoin spot ETF daily trading volume hits record high of US$2 billion! VanEck's HODL deal skyrockets

Course Introduction：Since its listing on January 11, Bitcoin spot ETF trading activity has continued to be booming. According to Bloomberg ETF analyst Eric Balchunas early this morning, the trading volume of nine ETFs (excluding GBTC) hit the highest single-day record since its listing, reaching approximately US$2 billion. This huge trading volume is mainly attributed to three ETFs: VanEck’s $HODL, WisdomTree’s $BTCW, and Bitwise’s $BITB, which set records of $399 million, $221 million, and $178 million respectively. The remarkable performance of these three ETFs has injected huge capital flows into the entire market, showing investors' strong interest in cryptocurrencies. "$2 billion deal

2024-02-21 comment 01002

VanEck's HODL deal skyrockets! Bitcoin spot ETF daily trading volume hits record high of US$2 billion!

Course Introduction：Since the Bitcoin spot ETF was listed on January 11 for more than a month, trading activities have continued to be hot. According to news released by Bloomberg’s ETF analyst Eric Balchunas early this morning, the trading volume of nine ETFs except GBTC reached the highest level since the market opened, reaching about 2 billion US dollars. This huge trading volume is mainly due to the three ETFs of VanEck’s $HODL, WisdomTree’s $BTCW and Bitwise’s $BITB, which each set records, reaching US$399 million, US$221 million and US$178 million respectively. “$2 billion in trading volume would put them in the top 10 or so among ETFs and the top 20 or so among stocks

2024-02-26 comment 0123

Bitcoin once hit $70,000! Total ETF trading volume exceeds US$100 billion

Course Introduction：This site (120btC.coM): Bitcoin once again pushed to a historical high on the evening of the 8th, once reaching US$70,040, and then fell to a minimum of US$66,063 (-5.68%), and is currently around US$68,000 (-3.1%). Bitcoin experienced an even bigger drop (down 14.59%) after breaking above its previous high of $69,000, which resulted in nearly $1.2 billion in liquidations in the cryptocurrency market. This is the largest liquidation event since the collapse of the FTX exchange in November 2022. Ethereum’s highest price reached $3,993. The scale of the nine ETFs finally surpassed GBTC. GBTC had a net outflow of US$302.9 million in transactions on the evening of March 8, which made the other nine ETFs

2024-03-10 comment 0115

澳大利亚最大证券交易所ASX上市首支比特币ETF，首日交易量达130万美元

Course Introduction：作者：Weilin，PANews6月20日，澳大利亚证券交易所（ASX）上市该交易所的首支比特币现货ETF，由美国资产管理公司VanEck发行，名为VanEckBitcoinETF，代码VBTC。VanEck种子投资约为98.5万澳元（约合65.7万美元）。从首日表现来看，该ETF首个交易日交易量达到130万美元。ASX占澳大利亚股票市场90%份额，为国内最大证券交易所。上市的VBTC是美国市场上价值6.47亿美元的VanEck比特币ETFHODL的联接基金（feederfund）。该基金已在澳

2024-06-21 comment 0387

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