add-one | adds one to a number

In SICP it defines the church numerals for positive numbers as follows:

I am trying to define a make-memoize function that has a function f as argument. The idea is that make-memoize would return a procedure f that runs with memoization. I have been able to return a procedure after defining make-memoize with the function f as parameter. However, I haven't been able to actually apply the function to say add, subtract or multiply a number. ie. If I apply make-memoize with add-one function as parameter to number 28, I should get 29 as the result.

Here is what I got so far:

I have a list with two dataframes:

Hello everybody

Every time I press a button it must add 1 to the value found in the input box

The problem is that every time I press the button instead of adding +1 to the value, it concatenates the value like it is a string

Expected result after clicking on the button 5 times:

I'm working through the official Rustlang book and have reached chapter 14.3. However, once I reach a certain point of building the workspace, the compiler throws an error. My project looks like this (as per the book)

Given an empty python datatable frame empty_dt = dt.Frame(names= list_features).
How can I add (append) one row at a time to it, (like in pandas dataframe in this question)

Thanks.

I'm a beginner in Emacs lisp, so this is really a noob question. Let's say that I have to write a function that uses a loop to add 1 to each element of a numeric vector.

Here is the code I wrote (the comments indicate what I'm trying to do at each step):