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Angular firestore perform another query from previous query

I using @angular/fire to query data and I want to saving the firebase cost by reducing the number call of firebase query. I have 2 function that query from the

How to change the default number of particles in gmapping launch file?

I would like to ask is this is the correct coding to change the number of particles of the gmapping package in launch file? <launch> <!-- Arguments -

Tabulator throws error when adding an empty row with datetime formatter

I have the following code (just a button, one column and one row) <div class='btn-toolbar'> <button id='new' class='btn buttons m-2 mdi mdi

Unity character goes flying

So I am working on the jumping of my character at the moment, and I have made the jumping work as I want it to, except that it does not check for ground. I coul

org.openrdf.query.MalformedQueryException for SparQL insert

I've read ways on how to insert data using SPARQL. Some references use INSERT while other references use INSERT DATA. So, I'm confused on how will I do the quer

Error creating bean with name 'org.springframework.integration.internalMessagingAnnotationPostProcessor'

I'm new at spring boot and my knowledge is so limited. I had an application that works with spring boot 2.1 and I want to use the last version of spring boot, w

Disable Reset button for every user and enable for only admin in android studio

so i have reset button which resets int values. i want only admin can click thT reset BUTTON and for every other user that button should be unclickable or hidde