unless is not explained.

It says %User{name: "Alice"} fails at compile time with a missing required field error, but when I tested it, it works fine and just sets the other fields to nil. There doesn't seem to be any required field validation happening here.

This is pointing to the required fields instead of the fields with defaults

The Python example uses reduce with a default value (0), but the Elixir translation uses Enum.reduce/2 without a default value. For a true equivalent, it should use Enum.reduce(numbers, 0, fn acc, x -> acc + x end) to match the Python behavior.

This syntax is not explained. Why is the comma(,) needed before the do, and why don't we write end, why the colon(:) after the do.

This seems out of place based on the 'Rules of the Game' - we're supposed to be Python devs who don't know Ruby. The Phoenix vs Rails comparison doesn't align with the established context, and it doesn't connect to the previous conversation either.

The Python example uses .title(), but the Elixir version uses String.capitalize() - these don't produce the same output. Should probably use .capitalize() in Python for a true equivalent. since Elixir doesn't have a title() function.

The outputs will also be different because of this.

The def syntax keeps appearing in examples, but I can't replicate it in the iex terminal. It seems like this only works in .ex files, but there's no explanation on how to create and run those files.

In the exercise above, it says 'Expected: 7', but here it says 'you got 7 words instead of the expected 6'. This part seems unnecessary.

This example missed out List.flatten part

All the subheadings are in an incorrect format.

This syntax gets used here but isn't explained until chapter 2.37. Feels a bit out of place - maybe add a quick note or move the explanation earlier?

From this section onwards, Elixir examples come first instead of Python. This breaks the established pattern from earlier sections.

It could be better if the arrow were aligned directly under the dot instead of being offset.

This example says parentheses are needed for the inner function call, but Example 1 just said they're not needed for simple cases like that. These examples look pretty similar to me - I'm confused about when I should actually use parentheses.

The parentheses examples could be shown first, since that's what Python devs are already familiar with, then introduce the optional syntax.

As per the above explanation, Everything returns a value in Elixir, isn't the def a statement just as in Python in the above example

This question seems out of place, as all the above elixir examples have parentheses.

Didn't explain what it was doing, as it seems like a new concept.

Heading got duplicated

Needs proper formatting

I got a CompileError when using the ^. ```elixir iex(7)> x = 6 6 iex(8)> 6 = x 6 iex(9)> 6 = 5 + 1 6 iex(10)> a = 5 5 iex(11)> ^x = ^a + 1 error: misplaced operator ^a

The pin operator ^ is supported only inside matches or inside custom macros. Make sure you are inside a match or all necessary macros have been required └─ iex:11

** (CompileError) cannot compile code (errors have been logged) ```

I tried the example, but a + 1 = x throws a compile error. The book says this should work 'both directions like algebra', but Elixir won't let me put an expression on the left side of the match. Am I missing something, or is this example incorrect?

This is exactly what I was looking for when pattern matching was first mentioned! It would be great to have this detailed explanation right when the concept gets introduced, instead of after the inspect topic.

edit: Just realized that it got explained in the Printing Values section

In the previous conversation, we have initialized the [1, 2, 3] in the list variable, but now we are using the numbers variable, which we have initialized in IPython.

It's confusing to use different variable names for the same operations.

The bullet points need proper line breaks.

It should be formatted as h.

It should be "make sure you have installed iex" - the word "sure" is missing.