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Questions - global-variables

Global array won't update, keeps giving garbage values when passed by reference

It's supposed to call a function through a thread for merge sort- but for some reason, it doesn't update the global array when I try to output it later through the main() function. So i tried passing ...
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MR DZ

c

multithreading

global-variables

mergesort

garbage

Votes: 0

Answers: 2

Latest Answer

TL;DR Remove all the & in front of array and it should work. An array is always passed by reference: think of the array as an int pointer. With an array declared like this int table[], using the v...
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Jocelyn

How do I listen for changes in global window variables with useEffect?

Say I have some links on my site which redirect to another domain, and I need to make sure that any tracking parameters also get passed over to that second domain. Most of these tracking parameters ar...
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charcole

reactjs

redux

react-hooks

global-variables

Votes: 0

Answers: 1

Latest Answer

You don't, useEffect is not meant to do that.
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timotgl

python - how to store settings in memory?

I'm totally new to Python, and I am trying to figure out a way to store settings. My application (python + pyqt5) stores the settings in a SqLite database. A function loads these settings at startup a...
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sharkyenergy

python

global-variables

Votes: 0

Answers: 1

Latest Answer

You may define an "environment" object in your main thread, and pass it to all your threads/tasks. For instance: from concurrent.futures import ThreadPoolExecutor from dataclasses import dat...
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gimix

Fetch variable from function into other function (under same function)

I am pretty new to Javascript, nodejs and socket io, so far everything has worked out, until I needed a new function which pulls data from multiply tables instead of just one table, when it's just one...
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HDIK

javascript

node.js

variables

socket.io

global-variables

Votes: 0

Answers: 2

Latest Answer

connection.query does not wait for a result so all three calls will be executed immediately and on the line console.log(rows); you won't have the correct accumulated value. You either need to wrap all...
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Anatoly

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