elvis | Laravel package for doing REST API queries | REST library

I've followed this GoRails video to get Devise working with hotwire-rails. I'm at a loss as to why my login error messages do not work the same way as in the video. The error messages work great on the registration form but on the login form I get this error:

I have a small bit of regex that I use to generate a new string:

I have javascript to fetch json information. I will be storing this json file locally (I downloaded an example file and added birthdate object for my use example from https://jsonplaceholder.typicode.com/users)

I am trying to parse the returned JSON information and post the contents into 2 seperate div's. I have a json object named "birthdate". In my script, I have a var set to call today's date named "today". It prints the date as "05-12" in console, and that is how I have the "birthdate" formatted in JSON as well. I don't need the year or time.

What I would like is to have the script compare "today" with the json object "birthdate". If today = birthdate, then I would like to have that entry information displayed in the user-list-today div to appear under the Birthday Today section of the page.

If today does not equal birthdate, I would like to have all other entries displayed in the user-list-future div to appear under the Birthday Future section of the page.

Nothing should be posted in both areas, only one or the other.

Any help that anyone could provide would be greatly appreciated. I will include all of my code below. The snippet may give error because I have local path to JSON file instead of online version.

Here is my codepen of it codepen doesnt have the birthday JSON object https://codepen.io/abc-123-webguy/pen/poegaLq

I want to log&return on null values from a supplier.

Without logging this works fine:

I'm trying to implement a custom operator for Collections similar to the Elvis operator (?: in kotlin, ?? in swift), but in addition to checking nullability, the operator also checks if the collection is Empty.

However, when I try to use the operator, the code doesn't compile. The compiler throws an "ambiguous use of operator" error.

The implementation of the ?? operator in the swift language seems to be really similar to mine, so I'm a little lost.. Any help to understand why this happens, and how to fix it, will be greatly appreciated.

Edit 2: Updated to take care of the problems from the dput output.

I don't know why the dput output is not working, so here is a roundabout way of sharing the data.

A simple zip file of the data can be downloaded from here: link to zip file

The following code should then represent the data I was trying to share. Note that you will need to replace the path name for the downloaded zip file, and that the parse_file function will create a temporary directory:

I am trying to concatenate a dictionary to a dataframe. When the dictionary has keys that are already in the dataframe, I am trying to delimit the values. Otherwise, I create a new column.

So, the original dataframe looks like:

I want to add columns to an existing dataframe based on a dictionary. If my dataframe looks like:

I am trying to build a function that uses a dataframe and a dictionary and returns a dataframe based on the conditions in the dictionary. My code looks like: