I’m trying to count the number of times a string, say AAA occurs in a longer string, say AAAA. The answer in this case is clearly 2: AAAA AAAA None of these work as I would expect: stringi::stri_count(str = "AAAA", regex = "AAA") [1] stringr::str_count(string = "AAAA", pattern = "AAA") [1] stringr::str_extract_all("AAAA", "AAA", simplify =… Read More Count occurences of substring in string
I have an example list of numbers: 888* 8* 8.88* 88.88* 88888.888* 899900 8.89 0.08 80 89899 50 32 30.8 0.081 0.8 8.1 and I only want to match those that have only 8’s. I put an asterisk for the ones I only want and the others should be ignored. I tried this but could… Read More Regex: matching for only one number in an integer R
I start learning Node.js and Express.js and I’m trying to create a simple API to list data from JSON file (using the GET method) and add a new user using the POST method. the GET method works fine but the POST method does not work when I request http://127.0.0.1:8080/listusers the API sends all users in… Read More node.js: The POST method in my RESTAPI does not work
The easy way to replace special characters in an array of objects in JavaScripts… Read More Replace special characters in array in JavaScript
I want to replace \n which is in array of objects. For now I came across this, but it replaces only string, not an actual ‘\n’ which makes the line break. var obj = { ‘a’: ‘\nThe fooman poured the drinks.’, ‘b’: { ‘c’: ‘Dogs say fook, but what does the fox say?’ } }… Read More Replace a \n in objects, which are in array
I am m trying to write an app that just saves and holds data, and I am getting the following error. Unexpected text node: . A text node cannot be a child of a < View >. (On Chrome DevTools) Text must be rendered withing a component (On Expo Go simulations) From what I understand… Read More React Native – Text must be rendered withing a <Text> component
Currently have all data displaying perfectly except the boolean ones. I have some data that if true or false they should display different html/css So, how can I have a class or html that shows the data if returns true? I’m a bit stuck on parsing this data on this code. As I was on… Read More Check if true or false on json parse into html
I can’t seem to figure out how to set the value of an array inside a loop… As you can see below, I retrieve some values from the database and loop through those. What I try to do here can be sum up approximately to the following: request_1(pk) getting all the bookings ids from that… Read More how to set the value of an array inside a loop?
const { json } = require(‘express/lib/response’); const mysql=require (‘mysql’); const express=require(‘express’); var app=express(); const bodyparser=require(‘body-parser’); app.use(bodyparser.json()); var mysqlConnection=mysql.createConnection({ host:’localhost’, user: ‘root’, password:”, database: ’employee_db’ }); mysqlConnection.connect((err)=>{ if(!err) { console.log("DB connection is successfull"); } else{ console.log("DB connection failed "+JSON.stringify(err,undefined,2)); } }); app.listen(8000,()=>console.log(‘Express server is running on port number: 8000’)); app.get(‘/employess’,(res,req)=>{ mysqlConnection.query(‘SELECT * FROM EMPLOYEE’,(err,rows,fields)=>{ if(!err) {… Read More I am trying to fetch information from phpmyadmin database, but in browser it's showing cannot get/employee and in command prompt there is no error
I am stuck to find the user by id using the find function. My this getUsers() function returns an array of objects. function getUsers(filter, limit, offset) { let userList = []; for (let i = 0; i < 100; i++) { let user = {}; user.id = i; user.firstname = ‘firstname_’ + i; user.lastname =… Read More How to use find method to search for an object in a function