Tag: WebDev

How do I overwrite a variable of a base class inside its abstraction? Here I have a class: #pragma once namespace BBT { class ObjectFeature { private: const char * name = "OBJFTR_DEFAULT"; public: const char * getName(); }; } Then I have a class that does classname : BBT::ObjectFeature, how do I make that overwrite the name variable? I would also like a good general explanation on the : character in class names, and if it's even called an abstract class.

I've already read several possible SO duplicates such as this and particularly this where hipertrtacker says register_shutdown_function can catch fatal errors and Peter Mortensen showed code very similar to my own. Can somebody please help explain why the following stripped down code is not calling my shutdown() function when it terminates? Have I made an unintentional coding error somewhere? (Note: The actual shutdown() function in the real script logs debug_backtrace() and other stuff to find out where I got to when I get a server timeout error) I'm deliberately setting timeout to 1s, then looping until the script terminates due to a timeout error. <?php function shutdown() { error_log("\r\n" . '

Goal: Implement fanout pattern for mqtt messages using rabbitmq. IoT data -> mqtt exchange -> RabbitMq stream -> multiple consumers RabbitMQ running locally like this (5552 is for stream, 1883 for mqtt): docker run -it --rm --name rabbitmq -p 5552:5552 -p 15672:15672 -p 5672:5672 -p 1883:1883 \ -e RABBITMQ_SERVER_ADDITIONAL_ERL_ARGS='-rabbitmq_stream advertised_host localhost' \ rabbitmq:4-management docker exec rabbitmq rabbitmq-plugins enable rabbitmq_stream rabbitmq_stream_management docker exec rabbitmq rabbitmq-plugins enable rabbitmq_mqtt I publish & verify I can consume mqtt data like this: # publish ❯ mosquitto_pub -h localhost -p 1883 -t test_mqtt -m "Hello, MQTT" -u guest -P guest # subscribe �

I am in the process of trying to implement OpenTelemetry in a React web application. I am wondering if there is a way to export a trace to the collector only when there is an error somewhere in the stack. I am using XMLHttpRequestInstrumentation and UserInteractionInstrumentation but the user interaction instrumentation is way too noisy and I would like to collect it only when the trace's span collection includes at least one entry where span's status code is set to ERROR. Is there a way to filter the traces before they are sent to the collector? (I am using BatchSpanProcessor).

I have a Scheme interpreter written in JavaScript called LIPS. And a recent version of Node changed the precision of the floating-point numbers by one digit (Node 24, because of V8 change). So (expt 0.5 -1/2) now returns 1.4142135623730951 instead of 1.414213562373095. But unit tests use the 1.414213562373095 constant to compare the output of the expression. I've resolved the issue by using rounding like this: (define (round-number x . rest) "(round-number x) Rounds float numbers to a given numbers of digits after decimal point. This fixes an aissue with V8 in Node 24 which increased precision." (let ((precision (if (null? rest) 10 (car rest)))) (if (number? x) (cond ((string=? x.__type__ "float") (round-fixed x precision)) ((and (strin

I am running a build for a large project using pnpm and Vite, but it keeps failing with out of memory errors. I have already tried increasing the Node memory limit significantly (to ~12GB), but it still crashes: NODE_OPTIONS="--max-old-space-size=12288" pnpm build I've also tried stripping my vite.config.js down to the bare minimum to rule out plugin issues. But FYI I cannot disable sourcemap generation (i.e. setting sourcemap: false is not an option as I need them for debugging). Are there other specific Vite configurations, Rollup options, or pnpm strategies I can use to decrease the memory footprint during the build?

I am a beginner and currently working on a website clone. I am facing an issue where an SVG icon is getting clipped from the top when it is displayed inside a circular container. I tried multiple CSS approaches such as centering with flexbox, adjusting margins, and changing overflow settings, but the problem still persists. The icon is centered correctly, but a small portion of the SVG is still cut off from the top. Here is the relevant HTML and CSS: HTML <div class="sec-fi-facecard"> <div class="sec-fi-card"><a href="#">Financial</a></div> <div class="sec-fi-card-main"><p>Connect with customers proactively to deliver AI-powered, high-value experiences.</p></div> <div class="sec-fi-

I'm new to Django. I've been making a project with 3 types of accounts: Schools, professors and users. But I feel like some things would be too "repetitive" like some model fields and views the views. I thought that having 3 apps would be too much, so I decided to delete them and create a single app as "accounts" where I manage schools, professors and users as 3 separate classes in models.py. Is this a good option? I'm kind of not sure

I have a c program and I'm using meson+ninja to build it project('NESt', 'c') source_files=files('src/main.c', 'src/App.h', 'src/App.c', 'src/Emulator.h', 'src/Emulator.c', 'src/Mapper.h', 'src/Mapper.c', 'src/CPU.h', 'src/CPU.c', 'src/MMU.h', 'src/MMU.c' ) executable('NESt', source_files, dependencies: dependency('sdl2')) the problem start here, as soon as i add the MMU.h and .c to the project, it compiles normally but gets stuck as soon as I execute it with a single line on terminal: Failed to truncate cookie file: Invalid argument the terminal freezes and ctrl+c doesn't work, all i can do it close the terminal instance and open another one. I restarted the laptop as well but it was still there I'm on linux mint MMU.h #include<stdint.h> typedef struct { //either we can have 64kb virtual mem or in my case original 2kb memory uint8_t memory[2*1024]; } MMU; v

Working script, but I need to change the output location to a different folder, and I want to use the same filename that is being loaded like in this one, but without the ".edit.mp4" ext="mp4" inputFolder="c:\\tmp\\" # def convert(filein): if(0 == adm.loadVideo(filein)): ui.displayError("oops","cannot load "+filein) raise adm.videoCodec("Copy") adm.audioClearTracks() adm.setSourceTrackLanguage(0,"und") if adm.audioTotalTracksCount() <= 0: raise("Cannot add audio track 0, total tracks: " + str(adm.audioTotalTracksCount())) adm.audioAddTrack(0) adm.audioCodec(0, "Lame") adm.audioSetDrc(0, 1) adm.audioSetShift(0, 0, 0) adm.audioSetNormalize2(0, 2, 150, -30) adm.setContainer("MP4", "muxerType=0", "optimize=1", "forceAspectRatio=False", "aspectRatio=1", "d