Skip to content
  • 0 Votes
    2 Posts
    748 Views
    zaasmiZ
    @zaasmi said in std::print() wrapper with altered format: Here’s a rewritten version of your question: “I’m trying to create a std::print() wrapper that modifies the output format, such as adding a prefix and suffix around the original format. I was able to achieve this using a macro. How can I improve this approach or implement it differently for more flexibility?” #define DECORATED_PRINT(fmt, ...) std::println("prefix " fmt " suffix", __VA_ARGS__) To achieve a std::print() wrapper with a modified format (e.g., adding a prefix and suffix), using a macro is one way, but there are other approaches that might offer more flexibility and better maintainability. Here are a few options: Using a Macro You can use a macro to wrap std::print() and modify the format. Here’s a simple example: #define PRINT_WITH_FORMAT(fmt, ...) std::print("[Prefix] " fmt " [Suffix]\n", ##__VA_ARGS__) While this works, macros have limitations in terms of type safety, debugging, and maintainability, especially for larger projects. Using a Function Template For more flexibility, you can create a function template that wraps std::print() and modifies the format. This way, you avoid the pitfalls of macros while still achieving the same goal: #include <format> #include <iostream> template<typename... Args> void print_with_format(const std::string& fmt, Args&&... args) { std::string formatted_message = std::format("[Prefix] " + fmt + " [Suffix]\n", std::forward<Args>(args)...); std::cout << formatted_message; } Usage: print_with_format("Hello, {}!", "World"); Custom Formatter (Advanced) If you want more control over the formatting process, you can create a custom formatter by extending std::formatter: #include <format> #include <iostream> template <> struct std::formatter<std::string> { constexpr auto parse(auto& ctx) { return ctx.begin(); } auto format(const std::string& s, auto& ctx) { return std::format_to(ctx.out(), "[Prefix] {} [Suffix]", s); } }; void print_with_format(const std::string& message) { std::cout << std::format("{}", message) << '\n'; } This approach gives you deep customization over how different types are formatted. Conclusion • Macros are quick and simple but have limitations in flexibility and maintainability. • Function templates offer a more modern, type-safe, and maintainable solution. • Custom formatters provide advanced control and customization, especially for complex formatting needs. For most use cases, the function template approach strikes a good balance between flexibility and simplicity.
  • 0 Votes
    2 Posts
    768 Views
    zaasmiZ
    @cyberian said in Firefox "A ServiceWorker passed a promise to FetchEvent.respondWith() that resolved with non-Response value ‘undefined’" for Local Server. or Cpanel: with non-Response value ‘undefined’" for Local Server. or Cpanel A ServiceWorker passed a promise to FetchEvent.respondWith The error message “A ServiceWorker passed a promise to FetchEvent.respondWith() that resolved with non-Response value ‘undefined’” usually occurs when a ServiceWorker is not handling requests properly. This can happen if the promise passed to fetchEvent.respondWith() resolves to something other than a Response object or undefined. Here’s how to address this issue, whether on a local server or cPanel: Common Causes and Fixes: 1.Improper Use of respondWith(): Make sure that when using fetchEvent.respondWith(), the promise passed resolves with a valid Response object, not undefined. Example: self.addEventListener('fetch', function(event) { event.respondWith( caches.match(event.request).then(function(response) { return response || fetch(event.request); }) ); }); In the above code, caches.match(event.request) returns a promise that resolves to a Response object or undefined. If undefined is returned, fetch(event.request) makes a network request, ensuring that a valid Response is always passed. Check if the Fetch Handler is Returning a Valid Response: • Make sure the handler function (e.g., caches.match(), fetch()) always returns something valid, like a cached resource or a network response. • Example of wrong code: event.respondWith( caches.match(event.request).then((response) => { if (response) { return response; } // Forgetting to return a network fetch or response will cause the error. }) ); Fix it by ensuring a response is always returned: event.respondWith( caches.match(event.request).then((response) => { return response || fetch(event.request); }) ); Local Server or cPanel Configuration: • If you’re running the code on a local server or through cPanel, ensure that the server is properly configured to serve the ServiceWorker file (sw.js) with the correct MIME type (usually text/javascript). • Check for proper paths. Ensure that the service-worker.js or similar file is in the correct location and accessible from your site. Example: if ('serviceWorker' in navigator) { navigator.serviceWorker.register('/service-worker.js') .then(function(registration) { console.log('ServiceWorker registered with scope:', registration.scope); }) .catch(function(error) { console.log('ServiceWorker registration failed:', error); }); } Debugging Steps: Check Browser Console: Look for other potential errors that might help pinpoint the issue. Clear Cache: Sometimes the ServiceWorker cache becomes corrupted. Clear the cache and see if the issue persists. • Go to Firefox DevTools > Application > Service Workers > Unregister and clear cache. Update ServiceWorker Script: Ensure the ServiceWorker script is up-to-date and properly handles all fetch requests with valid responses. By following these steps, you should be able to resolve the respondWith error and ensure proper handling of requests in your ServiceWorker.
  • 0 Votes
    2 Posts
    1k Views
    cyberianC
    @Engrnaveed-Saeed said in how to point dns like 2nd level subdomain of subdomain: how to create subdomain in godaddy - youtube how to create subdomain in godaddy without cpanel godaddy subdomain forwarding how to create subdomain in cpanel how to create a subdomain in wordpress godaddy how to create subdomain without cpanel godaddy subdomain mx record google domains To point a second-level subdomain of a subdomain (like level2.level1.example.com) using DNS, follow these steps: Access Your DNS Management System Log in to your DNS hosting provider or control panel where the DNS records for your domain are managed. Add an “A” or “CNAME” Record for the Second-Level Subdomain You can create the DNS entry by adding an A or CNAME record, depending on how you want the subdomain to resolve. For an A Record (Points directly to an IP address): 1. Choose the option to add a new record. 2. Select A Record as the type. 3. In the Name field, input the second-level subdomain in the format level2.level1. This creates a subdomain of a subdomain. 4. Enter the IP address where you want the subdomain to point. 5. Set TTL (time to live) if necessary (default is usually fine). For a CNAME Record (Alias to another domain): 1. Choose the option to add a new record. 2. Select CNAME Record as the type. 3. In the Name field, input level2.level1. 4. In the Value/Target field, enter the domain name (e.g., example.com) to which you want to alias this subdomain. 5. Set the TTL (optional). Ensure the Main Subdomain (level1.example.com) Is Set If level1.example.com does not already exist, make sure to create a DNS record for level1 by adding either an A record or CNAME for it. Save and Propagate After saving the changes, it may take up to 24–48 hours for the DNS changes to propagate fully across the internet. Example: If you want shop.us.example.com to point to a server: • For an A record: • Name: shop.us • Type: A • Value: 192.0.2.1 • For a CNAME record: • Name: shop.us • Type: CNAME • Value: store.example.com Let me know if you need further clarification!
  • 0 Votes
    2 Posts
    4k Views
    cyberianC
    20% Rule for passing a Subject For passing a subject a student is required to meet the following two requirements: A student is required to obtain at least 20% marks in first half i.e. Assignments, Quizzes, Discussions and Midterm collectively and at least 20% in second half i.e. Final Term exam. A student must secure at least 40% marks overall A student will be considered as Pass in the subject if he/she fulfills the above two requirements. Marks distribution: Distribution of marks is according to the Grading Scheme defined by the academics. Student can view subject Grading Scheme in VULMS under “Course Website” heading. Example: Keeping in view the first requirement of 20% rule and following grading scheme: First Half Second Half Net Score Assignments Quizzes GDBs Midterm Final Term First Half + Second Half 10% 3% 2% 35% 50% 100% First half marks = sum of all items like assignments, discussions, midterm, quizzes etc Second half marks = Final term marks. Case 1: More than 20% marks in every half but Net score is less than 40%. First Half First Half Marks out of 50 Second Half Status - Remarks Assignments Quizzes GDBs Midterm Marks Final Term out of 100 Marks out of Marks Marks Marks out of 50 10 out of 3 out of 2 out of 35 6 1 1 10 18 17 35 Fail - Net score less than 40% marks Case 2: Less than 20% marks in first half First Half First Half Second Half Assignments Quizzes GDBs Midterm Marks Final Term Net Score out of 100 Status- Remarks Marks out of Marks Marks Marks out of 50 Marks out of 50 10 out of 3 out of 2 out of 35 3 1 1 4 9 33 42 Fail - First half marks less than 20% Case 3: Less than 20% marks in second half First Half First Half Second Half Assignments Quizzes GDBs Midterm Marks Final Term Net Score out of 100 Status- Remarks Marks out of Marks Marks Marks out of 50 Marks out of 50 10 out of 3 out of 2 out of 35 9 2 2 24 37 8 45 Fail- First half marks less than 20% Case 4: More than 20% marks in every half with overall marks greater than or equal to 40% First Half First Half Second Half Assignments Quizzes GDBs Midterm Marks Final Term Net Score out of 100 Status- Remarks Marks out of Marks Marks Marks out of 50 Marks out of 50 10 out of 3 out of 2 out of 35 9 2 2 24 37 23 45 Pass - Fulfilling the all requirements
  • 0 Votes
    5 Posts
    2k Views
    zaasmiZ
    @Ghazi-Adeel said in You have alerts that need review Go to WhatsApp Manager?: You have alerts that need review Go to WhatsApp Manager It sounds like you received a notification indicating that you need to review alerts in WhatsApp Manager. Here’s how you can address it: 1. Go to WhatsApp Manager: • Open a browser and go to Facebook’s WhatsApp Manager. • Log in using your business account credentials. 2. Review Alerts: • Once logged in, check the dashboard for any notifications or alerts that require your attention. • These could relate to issues with messaging, payments, or settings that need to be adjusted. 3. Address Issues: • Follow the instructions given in the alert. It might ask you to update settings, verify details, or take action on certain conversations. If you’re having trouble finding the specific alert, look for the “Notifications” or “Alerts” section in the WhatsApp Manager dashboard.
  • 0 Votes
    6 Posts
    2k Views
    zaasmiZ
    @zaasmi said in false,Invalid type for 'logit_bias': expected an object, but got an integer instead.: The chatbot cannot be trained with these sources because the limit of your plan is 100000 characters. Upgrade your plan to increase the number of characters. how to increase? To increase the character limit for training your chatbot, you will likely need to upgrade your plan through the platform or service provider you’re using. Here’s how you can generally go about upgrading: 1. Visit the Provider’s Website or Dashboard: Log in to the account where you’re managing your chatbot. 2. Find the Subscription or Pricing Section: Look for a section related to subscriptions, plans, or billing. This is where the current limits and available upgrade options are usually listed. 3. Upgrade Your Plan: Choose a plan with higher limits, such as one that supports more characters for chatbot training. Follow the prompts to upgrade your account. Payment or subscription details may be required. 4. Confirm the Upgrade: Once you’ve upgraded, confirm that your character limit has increased, and try training your chatbot again. If you are using a specific platform like Talksyner or Dialogflow, check their pricing documentation or contact their support for assistance with upgrading.
  • 0 Votes
    2 Posts
    2k Views
    zaasmiZ
    @zaasmi said in Common Lighthouse Errors and Fixes Step by Step Guide: If you’re encountering errors when using Google Lighthouse (via Google PageSpeed Insights or Chrome DevTools) to evaluate your page’s performance, it’s crucial to address the specific issues Lighthouse reports. Below are common errors and their solutions to help you achieve a higher score. Common Lighthouse Errors and Fixes? Common Lighthouse Errors and Fixes? 1. Avoid Excessive DOM Size • Error: Large DOM size can slow down page rendering. • Solution: Simplify the structure of your HTML. Avoid deeply nested elements and reduce the number of nodes. 2. Reduce Unused JavaScript • Error: Unused JavaScript increases the time it takes for a page to load. • Solution: • Only load essential JavaScript on page load. • Remove unnecessary third-party scripts or defer non-critical scripts by using defer or async attributes. • Minify JavaScript. 3. Eliminate Render-Blocking Resources • Error: Resources like CSS or JavaScript block the first paint of the page. • Solution: • Inline critical CSS for above-the-fold content. • Defer non-critical CSS and JavaScript files. • Use media="print" for print stylesheets to defer them. 4. Use Next-Gen Image Formats (e.g., WebP) • Error: Images are being loaded in formats that are not optimized. • Solution: Convert your images to modern formats like WebP or AVIF to reduce image sizes without compromising quality. 5. Serve Images in Properly Sized Resolutions • Error: Images are being loaded in sizes that are larger than they need to be. • Solution: • Use responsive images with srcset and sizes attributes. • Only serve the necessary image size based on screen resolution. 6. Ensure Text Remains Visible During Webfont Load • Error: Web fonts can cause a flash of invisible text (FOIT). • Solution: Use the font-display: swap CSS property to show fallback text until the web font is fully loaded. 7. Reduce Initial Server Response Time • Error: Long server response times can slow down the loading process. • Solution: • Optimize server-side code and database queries. • Use caching mechanisms like CDN to serve content closer to users. 8. Minimize Main-Thread Work • Error: Too much JavaScript or inefficient code execution can overload the main thread. • Solution: • Minimize JavaScript execution time. • Use Web Workers to offload complex computations. 9. Efficiently Encode Images • Error: Images are being loaded in formats that aren’t efficiently compressed. • Solution: Compress images using tools like TinyPNG, ImageOptim, or Squoosh. 10. Reduce the Impact of Third-Party Code • Error: Third-party scripts (e.g., ads, analytics) can slow down loading times. • Solution: • Defer third-party scripts or load them asynchronously. • Remove unnecessary third-party integrations. 11. Enable Text Compression • Error: Resources like HTML, CSS, and JavaScript are not being compressed. • Solution: Enable Gzip or Brotli compression on your server to reduce resource sizes. 12. Defer Offscreen Images • Error: Images that are offscreen are being loaded too early. • Solution: Implement lazy loading for images so they load only when they are about to enter the viewport. 13. Preload Key Requests • Error: Critical resources (like fonts or CSS) are not being fetched early enough. • Solution: Use <link rel="preload"> in the <head> for key resources like fonts and CSS files to prioritize loading. 14. Remove Unused CSS • Error: Unused CSS increases page size. • Solution: Audit your CSS using tools like PurgeCSS to remove unused styles. 15. Properly Size Tap Targets • Error: Tap targets (like buttons or links) are too small or too close together on mobile. • Solution: Increase the size of tap targets to at least 48px by 48px and ensure enough spacing between them for better user experience on mobile. Google Lighthouse Metrics to Focus On: 1. Performance: • Focus on improving page load speed, time to interactive (TTI), and first contentful paint (FCP). • Aim for an FCP of less than 2 seconds and TTI of under 3.8 seconds. 2. Accessibility: • Ensure semantic HTML, ARIA roles, and proper color contrast are used for accessibility. 3. Best Practices: • Make sure HTTPS is enabled, resources are served securely, and there are no vulnerable JavaScript libraries. 4. SEO: • Ensure that the page is indexable and has optimized metadata, including title tags, meta descriptions, and proper use of headers (<h1>, <h2>, etc.). 5. Progressive Web App (PWA): • If applicable, you can also focus on making your site a PWA for offline access and better user experience on mobile. Running Lighthouse Locally • Google Chrome DevTools: Open Chrome DevTools, navigate to the “Lighthouse” tab, and run the audit. • PageSpeed Insights: Use Google’s PageSpeed Insights tool for a detailed report. By resolving the above issues and focusing on performance, accessibility, and SEO, you can significantly improve your Lighthouse scores and Google PageSpeed rankings.
  • 1 Votes
    2 Posts
    883 Views
    zaasmiZ
    @zaasmi said in dy/dx - = 1 - y,y(0) = 0 is an example of: dy dx = 1 - y,y(0) = 0 is an example of Answer An ordinary differential equation A partial differential equation A polynomial equation None of the given choices The equation \frac{dy}{dx} = 1 - y, \quad y(0) = 0  is an example of an ordinary differential equation (ODE). This is because it involves a function y of a single variable x and its derivative, which is characteristic of ordinary differential equations. Thus, the correct answer is An ordinary differential equation.
  • 0 Votes
    2 Posts
    842 Views
    zaasmiZ
    @zaasmi said in In Double integration, the interval [a, b] should be divided into [c, d) should be divided into --sub intervals of size k. --subintervals of size h and the interval: In Double integration, the interval [a, b] should be divided into [c, d) should be divided into --sub intervals of size k. --subintervals of size h and the interval Answer equal, equal equal, unequal unequal, equal unequal, unequal In double integration, the interval [a, b]  is typically divided into equal subintervals of size k, and the interval [c, d]  is divided into equal subintervals of size h. So, the correct answer is equal, equal. This means both intervals are subdivided into equal lengths, making it easier to apply numerical methods like the rectangle method, trapezoidal rule, or Simpson’s rule in double integration.
  • 1 Votes
    2 Posts
    870 Views
    zareenZ
    @zaasmi said in The (n + 1) th difference of a polynomial of degree n is...: The (n + 1) th difference of a polynomial of degree n is… Answer 0 Constant n +1 The (n + 1) difference of a polynomial of degree n is 0. This is because the differences eventually reach a constant value after taking differences equal to the degree of the polynomial plus one. Therefore, for a polynomial of degree n , the (n + 1) difference will always be zero. Thus, the correct answer is 0.
  • 1 Votes
    2 Posts
    815 Views
    zaasmiZ
    @zaasmi said in Let P be any real number and h be the step size of any interval. Then the relation between h and P for the backward difference is given by: Let P be any real number and h be the step size of any interval. Then the relation between h and P for the backward difference is given by Answer x-x, = Ph x- x, = P x + x, = Ph (x - x,)h= P In the context of backward difference, the relationship between the step size h  and the point P can be expressed as: x - x_n = Ph  Thus, the correct answer is x - x_n = Ph. This expression indicates that the difference between a point  and a previous point x_n  can be represented as a multiple of the step size h .
  • 0 Votes
    2 Posts
    811 Views
    zaasmiZ
    @zaasmi said in In integrating $\int_{0}^{\frac{2}{2}} \cos x d x$ by dividing the interval into four equal parts, width of the interval should be: In integrating $\int_{0}^{\frac{2}{2}} \cos x d x$ by dividing the interval into four equal parts, width of the interval should be Answer $\frac{\pi}{2}$ $\pi$ $\frac{\pi}{8}$ To determine the width of each interval for the integral \int_{0}^{\frac{\pi}{2}} \cos x , dx  by dividing the interval into four equal parts, we use the formula: h = \frac{b - a}{n} where: • a = 0, • b = \frac{\pi}{2}, • n = 4. Calculating h: h = \frac{\frac{\pi}{2} - 0}{4} = \frac{\frac{\pi}{2}}{4} = \frac{\pi}{8} So, the width of the interval should be \frac{\pi}{8} . Thus, the correct answer is \frac{\pi}{8} .
  • 0 Votes
    2 Posts
    804 Views
    zaasmiZ
    @zaasmi said in In fourth order Runge-Kutta method K 4: In fourth order Runge-Kutta method K 4 is given by Answer k4 = hf(xn th,yn + kz) k4 = hf(xn + 2h, + 2kz) None of the given choices k4 = hf(x, — h,Yn — kz) In the fourth-order Runge-Kutta method, k_4 ,  is given by the formula: k_4 = h \cdot f\left(x_n + h, y_n + k_3\right)  However, from the options you’ve provided, it seems that none of them correctly represent the standard formulation for k_4 . To clarify based on standard notation: •  k_4 depends on the function evaluated at the next step after adding the entire step size h to x_n and the third slope k_3 to y_n . If the options don’t include the correct form for k_4 , then the answer would be None of the given choices.
  • 0 Votes
    2 Posts
    773 Views
    zaasmiZ
    @zaasmi said in In fourth order Runge-Kutta method k2: In fourth order Runge-Kutta method k2 is given by Answer ^2-“/”“” З’Уп 3’ k2 = 45(-12.30-42) In the fourth-order Runge-Kutta method,  is computed using the following formula:  k_2 = h \cdot f\left( t_n + \frac{h}{2}, y_n + \frac{k_1}{2} \right) where: •  h is the step size •  t_n is the current value of the •  y_n is the current value of the dependent variable, •  k_1 = h \cdot f(t_n, y_n) is the first slope. The formula you provided seems to be incorrect or misformatted. If you have specific terms or a function f(t, y) , please clarify or correct the notation so I can provide the accurate calculation for  in your context.
  • 0 Votes
    2 Posts
    766 Views
    zaasmiZ
    @zaasmi said in What is the Process of finding the values outside the interval (Xo,x,) called?: What is the Process of finding the values outside the interval (Xo,x,) called? Answer interpolation iteration Polynomial equation extrapolation The process of finding the values outside the interval  is called extrapolation. So, the correct answer is extrapolation. Extrapolation involves estimating values beyond the known data points, while interpolation estimates values within the range of known data.
  • 0 Votes
    2 Posts
    872 Views
    zaasmiZ
    @zaasmi said in When we apply Simpson's 3/8 rule, the number of intervals n must be: When we apply Simpson’s 3/8 rule, the number of intervals n must be Answer Even Odd Multiple of 3 Page 177 Similarly in deriving composite Simpson’s 3/8 rule, we divide the interval of integration into n sub-intervals, where n is divisible by 3, and applying the integration formula Multiple of 8 When applying Simpson’s 3/8 rule, the number of intervals  must be a multiple of 3. Thus, the correct answer is Multiple of 3. This requirement ensures that each set of three intervals can be used to apply the 3/8 rule effectively.
Reputation Earning
How to Build a $1,000/Month World CUP LIVE Matches Live Cricket Streaming
Ads
File Sharing
Stats

0

Online

3.0k

Users

2.8k

Topics

8.5k

Posts
Popular Tags
Online User
| |