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Angular unit testing Type Error: Cannot read properties of undefined (reading 'get')

I am trying to mock the signup service, where the signup component consists of multiple form but getting the error as title(i.e. TypeError: Cannot read properti

Create Excel columns as dropdown list in .Net Core

I am new in .Net & in my .Net Core 5 API project there is a requirement to have particular column cells as dropdown list i.e., when the user clicks on any c

Replace all occurances of a character unless surrounded by two different patterns

I want to find a regex (preferably in perl, but any flavour will do) to replace every _ except those preceded by exactly 8 digits and followed by exactly 6 digi

Best way to check for null values in Java?

Before calling a function of an object, I need to check if the object is null, to avoid throwing a NullPointerException. What is the best way to go about this?

BoxPainter createBoxPainter([onChanged]) => The parameter onChanged can't have a value of null

I've copied/pasted some sample code for creating a custom BoxDecoration: class FrameDecoration extends Decoration { @override BoxPainter createBoxPainter([o

Unable to CURL POST in Python

The API instructions that I'm following state I should do the following: # Log in with a valid username and password to receive an authorization code. curl -X P

Excel VBA to update TOC and Table of Tables

I am having trouble getting my excel macro to update my word document (opened from excel) to update the table of tables. I have a table of contents and that ge