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Database Development

Find children whose parents are in the same room

I have two tables ROOMS and CONTACTS. I then have two types of contacts related to each other. Investigator(parent) and Tech(child) . First we assign a Tech to an Investigator. Then assign Investigators to ROOMS. Now we must assign Techs to the room. However I only want the user to see the tech as option […]

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Ask Chemistry

What is it meant by “preparing solutions on a blister”?

I was recently looking into an aspirin hydrolysis preparation lab and noticed the following: (This preparation was taken from http://www.kii3.ntf.uni-lj.si/analchemvoc2/file.php/1/HTML/SPEKTRA/kinetics2.htm) What is it meant by blisters, and by extension, the droplets? Does this simply indicate a ratio of added solutions? For example, to prepare 9mL of 12.5 mg/L concentrated salicylic acid solution, I would add […]

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Mastering Development

How to import variables from another google script editor

I am trying to use the GPPDF variable to be imported to another script editor. Is it possible? How can I call the variable into a different script editor? function DeliveryPass(e) { var GPDate = e.values[31]; var GPName = e.values[33]; var GPFloor = e.values[34]; var GPItem = e.values[37]; var GPRequester = e.values[38]; var GPWay = […]

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Mastering Development

E/libc: Access denied finding property “persist.vendor.sys.activitylog”

I am not sure where is the problem. This app is a drawing app. The error came out is E/libc: Access denied finding property "persist.vendor.sys.activitylog" Codes are copied from Youtube. However, there are not many errors inside the codes. Esp the Button, showColordialog. The system asked me to debug the app; hope for a second […]

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Mastering Development

how do i store the value of the 3rd line from the file in java and extract specific column details

I have a file wherein after reading the file i need to extract the 3rd line from the file into a variable or a structure in java and thereby extract specific column details into different array variables. BufferedReader br = null; String strLine = ""; try { LineNumberReader reader = new LineNumberReader(new InputStreamReader(new FileInputStream(fileName), "UTF-8")); […]

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Mastering Development

Access to XMLHttpRequest at address from origin address has been blocked by CORS policy

I have been tryingt to figure this out for the last 3 days why this does not work. My App Stack: Golang (Gin) Vue PostgreSQL (Gorm) I get the error in the browser: Access to XMLHttpRequest at ‘http://localhost:8000/admin/users’ from origin ‘http://localhost:8080’ has been blocked by CORS policy: Request header field access-control-allow-origin is not allowed by […]

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Mastering Development

Creating PDF from html template in node js

I have a requirement that I need to create a PDF. For me the best way is to do it render html template and create a PDF with any third party lib. I have come across the solution which render HTML with ejs and create pdf with html-pdf. It works fine though but I had […]

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Mastering Development

Nivo Calendar reactjs component not working?

I’m attempting to implement some nivo components into my application. For some reason, the component is not rendering – unsure what it is i’m doing wrong? This is the component i’m using as a initial example, import { ResponsiveCalendar } from ‘@nivo/calendar’ // make sure parent container have a defined height when using // responsive […]

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Mastering Development

Google Credential API one tab sign-in support only google app engine?

I’m learning google one tab sign-in according by https://codelabs.developers.google.com/codelabs/credential-management-api/index.html?index=..%2F..index#1 and https://developers.google.com/identity/one-tap/web/guides/get-google-api-clientid I see demo server side scripts (main.py) from google.appengine.ext import vendor vendor.add(‘lib’) import os import sys import binascii import json import urllib from bcrypt import bcrypt from flask import Flask, request, make_response, render_template,\ session, redirect, url_for from oauth2client import client from google.appengine.ext import ndb […]

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Mastering Development

Table View Not Updating After Reload and NSNotification

I use NSNotifications to call refreshChats when a user leaves a group chat. This updates User.current.groups (works correctly I’ve tested) so refreshChats should observe all the groups expect the group that the user just left. Tableview.reloadData() gets called after sorting the messages but I still see the group chat that I just left in the […]