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Article Introduction：VirtualDOM may become a performance bottleneck for VueJS in the following scenarios: 1. When data changes frequently and the amount of changes is large, the calculation amount of diff algorithm increases, resulting in performance degradation; 2. Frequent conversion of JavaScript objects to DOM nodes, especially on mobile devices; 3. Too many components are nested, complex update paths, and increased computing overhead.

2025-06-04 comment 0  292

Article Introduction：Tether (USDT) pledge interest rate is not fixed, it will change dynamically based on factors such as market supply and demand, platform policies, and pledge period. The calculation method of Tether's pledge interest rate is based on the amount of user pledge, pledge time and interest rate rules set by the platform. Interest rates are usually presented in the form of annualized rate of return (APY), and users can estimate their own returns through calculation tools or formulas provided by the platform. Is Tether's pledge interest rate high? The staking rate of Tether (USDT) is not fixed, and the staking rate of Tether changes with market supply and demand, platform policies, and pledge period. 1. Market supply and demand When the demand for Tether in the market increases, the pledge interest rate may be

2025-05-15 comment 0  839

Article Introduction：How to solve the problem of coin change? Use the dynamic programming method, the specific steps are as follows: 1. Create a dp array with a size of amount 1 and initialize it to the maximum value, set dp[0]=0; 2. Iterate through each coin and update the dp array, iterate each coin from its face value to amount, and take the minimum value dp[i]=min(dp[i],dp[i-coin] 1); 3. Finally, check whether dp[amount] is still greater than amount, if so, return -1, otherwise return dp[amount]. This method can effectively find out the minimum number of coins required to form the target amount or judge that it cannot be achieved.

2025-07-11 comment 0  864

Article Introduction：Creating fillable forms is easy to operate in Adobe AcrobatPro, and you can complete it by mastering the key steps. First prepare the PDF document to ensure that the layout is clear and the text is optional; then use the "Prepare Form" tool to enter the editing mode, manually add text boxes, check boxes and other fields, and standardize naming and set default values ??and formats; then adjust the field properties and order to ensure that the filling logic is reasonable; finally test the form function and save and share. The whole process can be completed in just over ten minutes after proficiency.

2025-07-03 comment 0  920

Article Introduction：How to use Vue to implement a single-header, multi-body electronic quotation form? In modern enterprises, the electronicization of quotation forms is the key to improving efficiency and accuracy. ...

2025-04-05 comment 0  574

Article Introduction：To create a fillable Word form, you need to enable "Development Tools" and use the controls. The specific steps are as follows: 1. Open Word → File → Options → Customize the Ribbon → Check "Development Tools" to enable the tab; 2. Insert controls such as text boxes, check boxes or drop-down lists in "Development Tools", right-click to set properties and default values, and test the usability of the controls; 3. After completing the design, select "Fill in Form" through "Protect Document" and start forced protection to prevent users from modifying the format at will. The whole process is simple to operate, and a practical form can be completed in a few minutes after proficiency.

2025-07-04 comment 0  630

Article Introduction：Steps for registration, deposit and withdrawal of BitForex exchange: Registration: Fill out the registration form and click "Register"; Deposit: After logging in, select the deposit currency, copy the deposit address and transfer funds; Withdraw: After logging in, select the withdrawal currency and enter the withdrawal currency The address and amount can be withdrawn after verification.

2024-12-07 comment 0  694

Article Introduction：The delivery calculation of Bitcoin contracts must be determined based on the contract type, delivery price and position situation. 1. In physical delivery, the number of positions held × the amount of delivery worth the single contract, and the seller must ensure full BTC; cash delivery is calculated based on (delivery price-opening price) × contract face value × contract number, and the reverse calculation is made when shorting. 2. The delivery price is usually the weighted average of the spot prices of multiple exchanges. 3. In terms of margin, check the maintenance margin before delivery, deduct the outstanding handling fees and return the remaining margin; perpetual contracts also need to settle the capital expenses, that is, the holding value × capital rate, etc.

2025-07-15 comment 0  211

Article Introduction：In order to efficiently collect visitor emails, WordPress provides many plug-ins. The following features need to be considered when selecting plug-ins: Form type: Select the form type according to the amount of information collected. Integration: Select an embedded form or a standalone form page, depending on the website design and user experience. Mail Service Provider Integration: Select the mail provider that supports you or plans to use. GDPR Compliance: Ensure that plugins provide a dual-choice consent mechanism that complies with the Data Protection Regulations.

2025-04-20 comment 0  379

Article Introduction：Compared with HTML4, HTML5 has significantly improved semantic tags, multimedia support, form functions and local storage. 1. HTML5 introduces more semantic tags such as, , etc., which improves code readability and SEO effect; 2. Natively support audio and video tags, without relying on third-party plug-ins, which improves compatibility and loading speed; 3. Add a variety of form input types and supports built-in verification mechanisms, reducing the use of JavaScript; 4. Provide ApplicationCache and localStorage/sessionStorage to realize offline applications and efficient data storage, while HTML4 can only rely on inefficient cookies to store a small amount of data.

2025-07-03 comment 0  495

Article Introduction：The currency circle commission rebate is a reward mechanism provided by an exchange or broker, which returns a certain proportion of commission to the user based on the transaction amount. As the world's leading cryptocurrency exchange, Binance also provides a rebate program. The rebate ratio depends on the user's transaction volume and VIP level, up to 40%. Binance’s rebate rules include rebate calculation, currency, cycle and qualifications, and all users who trade on Binance are eligible for rebate. The rebate program is applicable to spot trading and not to contract trading, and Binance reserves the right to modify or terminate the rebate program.

2025-02-15 comment 0  764

Article Introduction：Fund fees of perpetual contracts: Detailed explanation of the influencing factors and calculation methods. In a perpetual contract transaction, both parties to the transaction will pay or charge fees to each other according to the funding rate. This fee is usually called "fund fees" or "position fee". Its function is to keep the price of the perpetual contract consistent with the spot price and avoid long-term deviation. This article will conduct in-depth discussion on the level of funds for perpetual contracts and the specific calculation methods. Is the funding cost high? Generally speaking, the funding fee for perpetual contracts is not high, but the specific amount and frequency of collection are affected by market conditions and trading platform rules. The charging standards and methods of different exchanges vary greatly. Some exchanges may set higher fees to encourage short-term positions, while others use lower fees to attract long-term investors. Factors that affect funding costs include

2025-03-05 comment 0  1102

Article Introduction：Using numeric delimiters in JavaScript is very simple and has been widely supported since ES2021. 1. Use underscores\_ to improve readability, such as 1\_000\_000 to represent one million; 2. It does not affect the calculation or type of numerical value; 3. It cannot appear at the beginning or end of a number; 4. It cannot use multiple underscores in succession; 5. It cannot appear near the decimal point; 6. It can be used for amount, time stamp, ID and different binary representations. Just pay attention to the rules and you can use it with confidence.

2025-06-29 comment 0  395

Article Introduction：The performance of verification machine models on unknown data can be achieved through cross-validation. Common methods include: 1. K-FoldCrossValidation, which divides the data into K parts and takes turns as a test set to reduce division deviations, and is suitable for most classification and regression tasks; 2. StratifiedK-Fold, which maintains the consistency of various proportions when categories are unbalanced, and improves evaluation stability; 3. Leave-One-Out, which only leaves one sample test at a time, is suitable for a very small amount of data but has high calculation cost. The selection method should be determined based on the data characteristics and resource conditions. It is usually recommended to start with K-Fold with K=5.

2025-07-18 comment 0  459

Article Introduction：IndexedDB is a NoSQL database built in the browser, which supports storing a large amount of structured data and implementing offline synchronization. 1. It stores data in the form of key-value pairs, supporting transactions, indexes and asynchronous operations; 2. Core concepts include databases, object warehouses, indexes and transactions; 3. Offline synchronization process includes local temporary storage changes, monitoring network status, and uploading data after recovery; 4. Precautions include version control, asynchronous processing, compatibility and storage restrictions; 5. Conflict resolution can be done by timestamps, version numbers or manual intervention.

2025-07-16 comment 0  817

Article Introduction：In PL/SQL, the core difference between a procedure and a function is its purpose and return value: 1. The procedure is used to perform operations, and does not force the return value, but can return multiple values ??through the OUT parameter; 2. The function is used to calculate and return a single value, which is often used in expressions or SQL statements; for example, the update_salary procedure can perform update operations, while the get_bonus function returns the calculated bonus amount; the procedure is suitable for data modification and multiple output scenarios, and the function is suitable for calculation logic that needs to be embedded in SQL; in addition, functions can be called in the process, but procedures cannot be called directly in the SQL statement.

2025-06-21 comment 0  418

Article Introduction：The choice of data type is important because it determines storage space, query efficiency, data integrity and accuracy. For example, using VARCHAR to store years will lead to low range query efficiency, while DECIMAL can avoid the problem of loss of accuracy in amount calculation; numerical types should choose TINYINT, SMALLINT, INT or BIGINT according to size to avoid wasting or overflow; character types should choose CHAR, VARCHAR or TEXT as required to avoid abuse of VARCHAR (255); date and time types should choose DATE, DATETIME, etc. according to accuracy and time zone requirements; common misunderstandings include processing numbers as strings to cause sorting errors, ignoring character sets to cause storage problems, and not considering future scalability.

2025-07-12 comment 0  424

Article Introduction：MassAssignment refers to the assignment of multiple attributes to the model at one time by requesting, which may bring security risks. Prevention methods include: 1. Use the $fillable whitelist to explicitly allow fields to be filled, such as name, email, password; 2. Use the $guarded blacklist to exclude unfilled sensitive fields, such as is_admin; 3. Avoid using $request->all() directly. It is recommended to verify and filter out the required fields first; 4. Use the form request verification to enhance security; 5. Simulate illegal field submission during testing to ensure security. Reasonable use of whitelists or blacklists and cooperation with data verification can effectively prevent such hidden dangers.

2025-07-17 comment 0  288

Article Introduction：JavaScript functions are blocks of code that perform specific tasks, which are used to organize code, avoid duplication, and improve readability. The function is called by name and can receive parameters and return results. For example, functiongreet(name){return"Hello," name;} is a function that takes the parameter name and returns the greeting. Defining a function uses the function keyword, and the parameter value is passed when calling, such as letresult=add(2,3);. If there is no return value, undefined will be returned by default. Functions can be used in form verification, price calculation, event processing and other scenarios. It is recommended to keep the function single responsibilities, name clear, and split the complex responsibilities

2025-07-06 comment 0  606

Article Introduction：The NFT market boom and the controversy over Ethereum's energy consumption have emerged again. Ethereum NFTs consume an amazing amount of energy, and its transaction process (creating or selling NFTs) consumes an average of 214 kWh, which stems from its proof-of-work mechanism (similar to Bitcoin). Over the past year, the popularity of Ethereum and NFTs has increased dramatically, with NFTs having monthly transaction volumes on the Ethereum network reaching $10 billion. Many investors are concerned about the relationship between NFT and Ethereum, and this article will discuss this in-depth. Relevance between NFT and Ethereum The value of NFT varies according to rarity and other dynamic factors, and the NFT market is also composed of ERC-1155 (semi-homogeneous) tokens. To more accurately reflect the total value of NFT collectibles, NFTGo.io's market value calculation

2025-03-05 comment 0  664