Categories
Mastering Development

Getting unique formcontrol values for duplicated formfields angular

Introduction: I have a reactiveform. It contains two form fields named name and value. So I have a add button which duplicates the form. So if I click it the form fields name and value duplicates. So I am trying to use the respective inputs of the formfield named value below. I assign it to […]

Categories
Database Development

Row numbering difference between mariadb and mysql

I’ve recently updated my server into a docker setup and switched from mysql to mariadb. No I’ve run into an issue with different behavior between Mysql 5.7 on my local machine and MariaDB 10.5.6 on the server. The problem is a different result for a query which should return row numbers. I’ll explain using a […]

Categories
Raspberry Pi User Help

Using CEP in python

I’ve been working on a project that uses a raspberry pi hooked up to a ublox Zed-f9p gps. I have the GPS hooked up to a NodeMCU-ESP32s that is connecting to a local NTRIP server and getting RTCM corrections. The issue that I am having is that cgps is not updating SEP. The only way […]

Categories
Mastering Development

Find most frequently numbers in Python with Pandas from CSV

I have 5 rows with 10 numbers from 1 to 100 | | A | B | C | D | E | F | G | H | I | J | +—+—+—+—-+—-+—-+—-+—-+—-+—-+—-+ | 1 | 1 | 3 | 4 | 8 | 12 | 35 | 41 | 70 | 79 | […]

Categories
Mastering Development

Scrapy NotSupported and TimeoutError

My goal is to find out each and every link that contains daraz.com.bd/shop/ What I tried so far is bellow.. import scrapy class LinksSpider(scrapy.Spider): name = ‘links’ allowed_domains = [‘daraz.com.bd’] extracted_links = [] shop_list = [] def start_requests(self): start_urls = ‘https://www.daraz.com.bd’ yield scrapy.Request(url=start_urls, callback=self.extract_link) def extract_link(self, response): str_response_content_type = str(response.headers.get(‘content-type’)) if str_response_content_type == "b’text/html; charset=utf-8’" […]

Categories
Mastering Development

Python iterating through dictionary

I am trying to iterate through a dictionary and I’m not sure how to update while looping through. What I’m trying to do (Simulating LFU cache): Requests are taken, Iterate through each requests one by one and count the frequency of each using dictionary. If the dictionary holds more than 8 keys remove the lowest […]

Categories
Ask Electrical Engineering Engineering

NodeMCU AT Commands with UART not working

Hi, here are my specs :- PIC16F877A microcontroller NodeMCU (reflashed and got AT commands working via software only) XC8 Compiler (using MPLAB X IDE) Question :- What I’m trying to do is, trying to get the basic "AT" test functionality working (to get "OK" from the NodeMCU), and display "ESP Connected" status on my LCD. […]

Categories
Mastering Development

Getting the name of a specific column of df within a list

Example Data: df1 <- as.data.frame(rbind(c(1,2,3), c(1, NA, 4), c(NA, NA, NA), c(4,6,7), c(4, 8, NA))) df2 <- as.data.frame(rbind(c(1,2,3), c(1, NA, 4), c(4,6,7), c(NA, NA, NA), c(4, 8, NA))) dfList <- list(df1,df2) colnames <- c("A","B","C") dfList[[1]] # V1 V2 V3 # 1 1 2 3 # 2 1 NA 4 # 3 NA NA NA # […]

Categories
Mastering Development

Is there a more concise way to conditionally loop over rows in a dataframe?

I have a simple dataframe and would like to apply a function to a particular column based on the status of another column. myDF = pd.DataFrame({‘trial’: [‘A’,’B’,’A’,’B’,’A’,’B’], ‘score’: [1,2,3,4,5,6]}) I would like to multiply each observation in the score column by 10, but only if the trial name is ‘A’. If it is ‘B’, I […]

Categories
Mastering Development

What is the Ascii value that needs to be subtracted from char in my 2d array in Java?

I’m sorry as I’m not too sure how to word this but, I am making a very small and simple Chessboard that takes strings from another class and outputs them on the board. I am trying to use a 2d array to display a list of characters followed by their corresponding number (a-1 to h-8). […]