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Linux Mastering Development Ubuntu

Realtek RTL8821AE wifi issue on Ubuntu 20.04

I am getting this weird issue on my laptop: When I’m very close to the wifi-router I get excellent speeds. Moving even 10 feet away from the router brings my download speed down from 100 MBps on speedtest.net to 88kbps and a ping latency from 19ms to 1077ms. What’s even weirder is, that, when I […]

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Linux Mastering Development

Thunderbolt – Displayport Monitors not detected on reboot. XPS 13 Arch Linux (endeavourOS)

I am running EndeavourOS (Arch) on a 2017 Dell XPS 13. Kernel 5.7.2-arch1-1 [Hardware name: Dell Inc. XPS 13 9360/02PG84, BIOS 2.13.0 11/14/2019] I have a multi-monitor setup at my desk, that, when working has the following config: xrandr: eDP1 connected primary 1920×1080+0+0 (normal left inverted right x axis y axis) 290mm x 170mm 1920×1080 […]

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Mastering Development

How to do arthmetic on Django ‘F’ types?

I have an Event model, that, for the sake of simplicity only has a lat and lon FloatField(). From pythons native "geopy.distance" library, you can acquire the distance bewteen two coordinates like so: from geopy.distance import distance home = (33.28473, -117.20384) event = (33.829384, -117.38932) distance = distance(home, event).miles #returns a float In my application […]

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Database Development

Why did Codd, et al. prohibit intermediate scalars in SELECT – and how would they have recommended avoiding syntactic repetition?

(I’m asking this because I was reviewing this older question I asked and because I’m currently writing some queries and getting annoyed at how much I need to repeat myself). In ISO-compliant SQL implementations, expressions and computed-columns in a SELECT clause cannot be referenced by other expressions in the same query (i.e. not in other […]

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Artificial Intelligence (AI) Mastering Development

BLEU_SCORE gives bad scores – what am I doing wrong?

I want to calculate the BLEU_SCORE but it gives me bad results I don’t know why? for example this is my reference and predicted sentences ref : [‘electron’, ‘and’, ‘a’, ‘proton’] predicted : [‘electron’, ‘and’, ‘a’, ‘proton’] ref : [‘to’, ‘reach’, ‘the’, ‘nectar’, ‘at’, ‘the’, ‘bottom’, ‘of’, ‘flowers’] predicted : [‘to’, ‘reach’, ‘the’, ‘nectar’, ‘at’, […]

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Mastering Development System & Network

How (if at all) is KVM used with enterprise workloads?

This is sort of similar to Q123566, but I want to add a few clarifications: KVM is the Linux-kernel-based virtualization technology (specifically: a hypervisor) that underlies most non-Xen FOSS virtualization platforms/tools. QEMU is an atomic tool/utility/program, that, today, fills the role that kvm(1) did while its eponymous hypervisor was under development. It is capable of […]

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Mastering Development

React state not accessible when using UseRef with Debouncer

I am having a hard time debugging what is going awry here. I am trying to use a debounce function so that a user can type on ReactQuil, then when they stop typing for a bit, the debounce function triggers another function to update the database with the state that’s inside the React Quil Component. […]

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Mastering Development

How to redefine operations for Scala type tags

Suppose I have a tagged type eg.: import shapeless.tag.@@ import shapeless.tag trait VolumeTag type Volume = Double @@ VolumeTag def Volume(value: Double): Volume = tag[Volume][Double](value) Now, the problem I have is, that, for example when I add two objects of type Volume, I get a double. How can I redefine the + operator, so that […]

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Mastering Development

Do i need to remove brackets for tokenization? RegexpTokenizer

First attempt at tokenization using nltk’s RegexpTokenizer for an assignment (necessary). Not sure if I should remove brackets? You are required to extract the token and append them into the list ‘token’ …not sure if I even did this right. import re import nltk from nltk.tokenize import RegexpTokenizer from nltk.probability import * from itertools import […]

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Mastering Development

TypeError: Image data cannot be converted to float on wordcloud project

So we have this code practice to create a word cloud, seems very simple since its just creating a dictionary…but somehow the code they provided to execute the word cloud is giving me an error of “TypeError: Image data cannot be converted to float”. I’ve checked the very same text file used on my own […]