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mongodb find where no matching item in other collection

I need help with a query. I have a collection user and timeplan. timeplan has the key date. Now I want to select all users where no timeplan exists for the date

Flutterfire deleting item from database

I am trying to delete a specific item from a database given only its element values. However, I keep getting the error message "The type 'Stream<QuerySnapsho

validation-remove currency symbol from price

I have this one string, which is actually price, this price value comes with any currency symbol (currency_list), I am trying to remove these currency symbols f

flutter) The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0

Debuging the ios simulator outputs the following error. warning: The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0, but the range o

How to combine string inputs and generate array dynamically?

param([string]$roles,[string]$members) Suppose I am passing input on the command line like this: PS> role1,role2,role3,role4 member1,member2,,,,member3,,mem

How can I use a NPM package within a Deno app?

I want to know how can I use this NPM package inside my Deno application?

Removing titlebar from Qt window while keeping the default window borders

I'm trying to remove the default Windows titlebar from my Qt window (QT version 5.12.2 and using C++) while still keeping the window borders. I've more or less