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Can I change the notation in a built-in Isabelle type-class

I have made a type of mine an instance of monoid_add: instantiation "marking_ext" :: (monoid_add) monoid_add begin definition marking_add_def: "M + N = ... end I can now use the ...
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How to do a “safe” SPLIT in Google BigQuery?

The following code on Google BigQuery throws an index out of bounds error. SELECT SPLIT(CONCEPT_CKI, "!")[OFFSET(0)] AS Standard_Name ,SPLIT(CONCEPT_CKI, "!")[OFFSET(1)] AS Standard_Code FROM ...
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NSAnimationContext crashing when called by an Observer

I have two WebViews: webView and customizerWebView. Both of these WKWebViews are attached by a trailing constraint. Essentially, when I go to the menu and click "Show Customizer" showCustomizer() or "...
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Transform R dataframe into JSON

Hi! I have an R dataframe in the following format: user_id email segment name 123 a@gmail.com new a 234 b@gmail.com old b How to trasform it into JSON with ...
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adding / removing entry in a structure defined C language list

I have a structure list defined at the beginning of a program and I want to add/ remove items in that list during execution. I have tried different thing like : sensor_list[3] = {...
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Python: How to solve for multiple x values that give the same nonzero output?

I am working with a curve with two parameters (α,β), in addition to the independent (x between 0 and 1) and dependent (y) variables. I have a function which takes a value for the independent variable ...
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Python Kivy Garden Mapview - Adding New Marker On Top of an Existing One But With a Different Icon

I am doing my first app on Kivy where you can search for a particular product and it will show stores where you can get that product free of plastic packaging using the MapView widget from kivy garden....
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Woocommerce - Moving variation description to Description tab after the content

I've been fighting with if for a while now. I know that variation description is connected to add to cart (and moving it below button is not a problem), I can't figure out to move description to the ...
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Merging two different styles of DiscordAPI / RestCord array in PHP

I have an array of Discord roles, and and a list of total roles in my server. My roles: array:10 [▼ 0 => 290943980919848960 1 => 290944181344403456 2 => 408996370930860051 3 => ...
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Strategies for Implementing Custom Loss function to model ODE in Keras

What is the best strategy to implement the following equation in Keras to model the nonlinear function f. Target: y (time-series of hourly data). Features: X and X1 (time-series of hourly data).
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AttributeError: module 'asyncio' has no attribute 'Future'

Im running into an issue where I'm running Python 3.7.7, and installed tornado using pip3 install tornado However, when I run this in the terminal: python3 import asyncio I get the following ...
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Python argparse @fromfile argument not recognised

I'm trying to set an argument in a "fromfile" text file, but it's not recognised, however if I copy/paste the SAME arguments into the command line, it works! What's going on? Here's a minimal example:...
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Why can't I link “xlnt” library?

I've scoured SO and found some similar questions, but nothing in the answers helped me. I'm in no way a seasoned c++ programmer, and it feels like I'm hitting a brick wall with this library. Though I ...
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Cannot locate Xamarin.Forms.Platform, Xamarin.Forms.Platform.Android pdb symbols

I cannot locate or load a compatible symbol (pdb) file for Xamarin.Forms.Platform.Android.dll. I'm debugging a standard "Blank" template Xamarin App from Visual Studio, which by default includes the ...
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Loading basic HTML in Node.js inside string “html”

Hello I'm thinking if there is any way to load HTML inside node.js as a string in app.get("/html") Like "<-html->blabla"... A normal but inside the node.js code Cuz I want to put database values ...

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