Why does an association with 2 rules behave differently than an association with one rule in this example:
In[98]:= {Reverse[<|a -> {2, 3}, b -> {4, 5}|>, {2}], Reverse[<|a -> {2, 3}|>, {2}]}

Out[98]= {<|a -> {3, 2}, b -> {5, 4}|>, <|a -> {2, 3}|>}

My contribution is from a fav Jazz Art from the National Museum of American History, LeRoy Neiman's Big Band

Hi

I was very pleased with my experience w the course, including the Quiz. An Email I recvd on 7Apr2022 said in part:

"Quiz Email 7Apr2022 The quizzes are ready at the links below. There are five quizzes that must be passed with scores of 60% or higher to earn your completion certificate. You have until April 15th to complete them. https://wolfr.am/WSG23_Quiz1 https://wolfr.am/WSG23_Quiz2 https://wolfr.am/WSG23_Quiz3 https://wolfr.am/WSG23_Quiz4 https://wolfr.am/WSG23_Quiz5"

I took the 5 Quiz during the week of 11-15Apr2022, which included the last Quiz on the last Day. I can confirm that the Quizes appeared to be accepted and Graded.

On one test, for two of the questions NONE of the answers were entirely correct, according to my evaluation and since these 2 Questions were of the type "Which of the following answers are correct", I left them blank...sometimes in the past with college-level multiple-choice tests I have had questions where no answer was correct, so this did not seem to be entirely out-of-line to answer that way. Although, normally, in college muliple choice test, one is asked to "Pick the Answer closest to being correct" Regardless, these were the only 2 question (for that test) graded wrong, so I still got 80%. And the tests all seemed to allow retaking to get a better grade (each attempt would result in saying the test result was recorded, but to retake the quiz if I wished, which I did do, even tho I always got a passing score the 1st time, and for each subsequent try). If I re-took the test, it was simply to find out the correct answer on the 1 or 2 I missed...I'm assuming the 60% score reqt for the certificate applied for the 1st try? When I re-took the test where I left 2 blank, the answer closest to the correct answer seemed to be determined as being correct, but I did confirm that the question evaluated by MY copy of Mathematica did indeed give a slightly different answer, as I had deduced on the 1st Try. I know, life is messy?

Which brings up the question. When do you send out the Certificates? Presumably by mail, or is it by email? I await eagerly.

I realize that may take a few weeks, but in the era of instant gratification...I am left devoid of the anticipated gratification of having successfully completed the course and quizzes.

Thank You Again James L Brown

Thank you to all who have been participating in the study group so far. As noted by Rory in today's session, Lesson 10 of the course is your homework for the evening:

https://www.wolfram.com/wolfram-u/an-elementary-introduction-to-the-wolfram-language/10-images.en.html

You will need to be logged in with your Wolfram ID to directly enter the course, otherwise you directed to sign in to continue.

this is awesome, I love the triangles!

nice! I love that you combined our learning on manipulate with this project!

haha true!

Is anyone else having a problem going to the link for Quiz 1?. See attachment for the returned error. I get this error using both Chrome and Safari browsers. I get the same error when I try to open "An Elementary Introduction to the Wolfram Language".

Attachments:

Screen Shot 2022...png

Hi!

Merge[assocList, Total]

Should do the same thing :)

nice!

I have send you an reply email Regarding the Issues with quiz

I do not see your email. I have checked gmail, inbox, spam, junk & deleted items. Please resend it.

New Intro to Wolfram Language Daily Study Group (begins March 21!)

When I downloaded the Course Materials at the End of the Last Day of the Course, there does not seem to be any of the Week 3 notebooks. Week 1 and Week 2 notebooks are there, but not Week 3. There seems to be no new files added since Apr 1 (hmmm, All Fools Day?).

Were any new files added more recent than Apr 1, and somehow I'm downloading the wrong cache of files?

The fruit roll problem:

The theoretical probabilities, P, of Winner, Loser, and Try again are:

P(W)=5/5^3=1/25=4%, P(L)=(5 * 4 * 3)/5^3=12/25=48%, and P(T)=1-(P(W)+P(L))=1-52%=48%.

Attached file FruitRoll_GDorfman_9apr22.nb contains two items:

(1) An alternative module for the problem that avoids using Which, Switch, etc., together with code to output 30 executions of it

(2) A simple Monte Carlo analysis that supports the theoretically computed probabilities.

Attachments:

FruitRoll_GDorfm...nb

I found at least one answer for 2 of the Questions on Quiz 2 was "close" to being correct, but actually all of the offered answers for these 2 Questions still contained some errors where they would not evaluate properly. I'm guessing that each person receives a set of different Questions on their Quiz 2 that they are confronted with; the Questions being extracted at random from a Pool of Test Questions (a New Wolfram Language Function: RandomQuestion[10]??).

Anyway, I'm not particularly bothered, as I passed it anyway, but would like to describe the particulars so as to contribute to an improvement in the Pool of Questions. For obvious reasons, I realize it might be best not to discuss this openly in this forum.

Is there an email that I can send the 2 Questions, and what I believe is incorrect as to the offered answers?

Also, it is suggested -in the Quiz- that to get the Certificate, you must get 60% score...I'm thinking that what is meant is the the score should be 60% or greater, otherwise I would have had to go back and change 4 of my answers to reduce my score back to 60%?

Overall, it's been Fun so Far. And I do appreciate the effort that the Gang at Wolfram has made in offering this course.

Please, correcting: "Dear Instructors: I have understood that QUIZZES WERE due today April 14th, 2022." in fact, today is due day: April 15th 2022. Best wishes, Marcos

Yes I have also encountered that at times, especially if you copy & paste something into the cell instead of entering a solution entirely by hand. I'm not sure, but there may be other characters that get entered into the cell that are perhaps control characters that are not visible? Sometimes, I just ignored it knowing that I had the correct solution, sometimes, I cleared the cell and manually entered the content and that seemed to fix the problem.

Thank you James and congratulation for the successful completion of the Study Group !!! See you in next classes to come! Best wishes, Marcos

Hello Ricardo and Erik,

Thank you for your feedback, we looked into the exercises noted and found that they were older version of the notebooks. You fix this by going to https://www.wolframcloud.com/browse#Home/Copied%20Files and deleting the exercise notebook, then refreshing the page. Please email us at wolfram-u@wolfram.com if you experience further issues.