Software Development

8.7.0.3

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Software Development

From the first day of the semester forward we expect students (you) to visit this page once per 24 hours.

“To be any kind of professional means being willing to tell the client a truth he doesn’t want to hear.” – Holman W. Jenkins, Jr.

“I’m still friends with folks I worked with decades ago, many who would beat me up in meetings, ripping apart my arguments with what seemed like an ice pick. Still, they made me better.” – Andy Kessler

“It is on the syllabus.”

Friday, December 16th, 2022 8:55:11am

The End

Wednesday, December 7th, 2022 10:04:43pm

You may wish to run your xserver-xclients script (10 — Revised!) on these sample tests.

Wednesday, December 7th, 2022 8:10:00pm

Check the Final Code Walks page to make sure you are signed up for code-walk slot. Each partner must bring a laptop with the code-based pulled to the appropriate commit. The College’s tech is brittle, and we never know which one works properly. because of this brittleness, the code walks will take place in WVH 164 and 166.

During the code-walk, one partner will present and tell the other partner where to navigate. The partner at the laptop must not scroll or switch to places in the code base unless the presenter asks.

Wednesday, December 7th, 2022 3:52:53pm

Here is what I recommended to some students in my section for debugging server/client interactions.

Two different pairs may meet and run a server/client connection over a local network. Do not exchange code to run on one laptop; it too easily leads to plagiarism.

On campus, local networks are unlikely to permit such setups. At home, it should be feasible but you may have to check your router’s settings. What works for sure us to turn an iPhone into a hotspot and connect via that local network.

Once your laptops are on such networks, determine your laptop’s IP address and use ping from a shell to make sure the two laptop can see each other. After that, you may have to launch the server on the dynamically assigned IP address (not localhost) to make it visible.

At least one pairing of pairs, found bugs in their systems immediately.

Monday, December 5th, 2022 11:39:13pm

A question about my 1-round led to the discovery of a (n unrelated) bug. Here is the debugging story.

My debugging started with a unit test that exposes the bug in a repeatable fashion. The unit test consists of three individual "check expects":

;; one player passes once, the other player always;
;; both are at the same distance and must win
(define p1-palways (list pass-ω pass-1))
(define p1-state (xstate padded-oli p1-palways))

(for ([p (map cnr p1-palways)])
(check-equal? (send p take-turn p1-state) PASS (~a (cnr-name p) " passes")))
(check-equal? (score-game p1-state) `[,(map car p1-palways) []] "both pass, score!")
(check-equal? (referee/state p1-state) `[,(map cnr p1-palways) []] "pass-pass")

The first one makes sure that in the current state, both players would pass. The second one tells the reader that in this state both are indeed winners. The third test runs the referee on the current state—and it fails with the old code.

The fix is to move the “field” assignment (for all-passed) from the second result clause of xsend+ to is-done?, the function that inspects the transition from the old state to the new one according to the player’s choice:

#; {type OneTurn = (values State [Listof RIP])}
#; "(value s out)"
;; s : the state after one turn
;; out : the lis of misbehaving players at the end of the turn

#; {RIP State [Listof RIP] -> OneTurn}
(define ((one-turn return all-passed) ap s out)
  (xsend+ ap take-turn (rstate->pstate s)
          [[failed        (values (kick-out s) (cons ap out))]
           [(clegal s s+) (is-done? return s out s+ all-passed)]
           [_             (values (kick-out s) (cons ap out))]]))

#; {[OneRound -> Empty] State [Listof RIP] State [Box Boolean] -> OneTurn}
;; `s+` is the result of applying a legal action to `s`
;; check the state that the active player has created & terminate the turn
;; EFFECT assign a new goal if needed and
(define (is-done? return-to-run-game s out s+ all-passed)
  (with-obs s+)
  (cond
    [(player-passed? s s+)           (values (turn-over s+) out)]
    [(player-not-passed! all-passed)]  ;; is always #false but updates `all-passed`
    [(finished? s+)                  (return-to-run-game s+ #true #false out)]
    [(assign-next-goal s+) =>        (inform-of-new-goal! out)]
    [else                            (values (turn-over s+) out)]))

The key to note here is that I removed the assignment to all-passed from run-one-round and added it to is-done?. The actual assignment is hidden in player-not-passed, which looks like a condition but merely changes the value of all-passed and always fails.

In the process the method grew to 10 lines, so I introduced some auxiliaries for readability:

#; {[Listof RIP] -> [List State RIP] -> OneTurn}
;; EFFECT inform player of newly assigned goal
(define ((inform-of-new-goal! out) state+ap)
  (match-define [list s++ ap] state+ap)
  (xsend+ ap setup #false (player-going-to ap)
          [[failed (values (kick-out s++)  (cons ap out))]
           [_      (values (turn-over s++) out)]]))

;; auxiliaries for readability only
(define (player-passed? s s+) (eq? s s+))
(define (player-not-passed! b) (set-box! b #false) #false)

Monday, December 5th, 2022 9:34:18pm

Here are the results of your vote on the presentation/paneling grades:

ok+

ok

ok-

zero
99

94

88

76

Friday, December 2nd, 2022 10:31:07pm

Instagram has forked Python to make its type system somewhat sound. The word “sound” is a technical term, and often comes with “soundness theorem,” “safety theorem,” or the technical “progress and preservation theorem.” In essence this means that types are meaningful and help developers beyond editing in an IDE. The language is called Cinder and currently available for Linux:

the Cinder web site

A group at Brown has published a first research paper investigating this new design; many of you might have an easier time scanning this paper than the Cinder web site (for now). You will also get a somewhat more nuanced impression than from the creators.

Wednesday, November 30th, 2022 9:18:08pm

Code Walks for Thu, 1 December 2022

Section MF-915

Presenters: Thomas Mactaggart, Dylan Burati

Head Reader: Jamie Lin

Assistant Reader: Chris Tozlowski

Secretary: Luke Po

Presenters: Michael Guo

Head Reader: Garrett Michiels

Assistant Reader: Nuocheng Wang

Secretary: Nick Frank

Section MF-1030

Presenters: Justin Kwon

Head Reader: Vedant Rautela

Assistant Reader: Abby Wisnewski

Secretary: Qishen Pang

Presenters: Sahana Tankala, Luis Soto

Head Reader: Michael Ford

Assistant Reader: Justin Kwon

Secretary: Bryce Devoe

Section BL-1030

Presenters: Anna Maria Barbiellini Amidei Vasilios Gjezo, Sophia Thomas

Head Reader: Shannon McInnis

Assistant Reader: Can Ivit

Secretary: Owen Thurm

Presenters: Emily Minor

Head Reader: Reilly Farrell

Assistant Reader: Charles Williams

Secretary: Duncan Vogel

Section BL-135

Presenters: Logan Morneault, Shashwat Patel

Head Reader: Jonathan Hsieh

Assistant Reader: Alex Kerwick

Secretary: Jack Craciun

Presenters: Deion Smith

Head Reader: Andre Danahy

Assistant Reader: Yolanda Jarrin

Secretary: Angel Gong

Wednesday, November 30th, 2022 3:57:53pm

You may wish to run your xserver-xclients script (9 — The Revision) on these sample tests.

Tuesday, November 29th, 2022 7:43:32pm

Code Walks for Wed, 30 November 2022

Section MF-915

Presenters: Benjamin Alonzo, Jessica Su

Head Reader: Dylan Sapienza

Assistant Reader: Kyle Ednie

Secretary: Joey Kim

Presenters: Daniel Robbins, Aditya Selvam

Head Reader: Eric Yip

Assistant Reader: Akshay Dupuguntla

Secretary: David Yan

Section MF-1030

Presenters: Andrew Sayegh, Emily Smith

Head Reader: Jason Cheung Xun Xu

Assistant Reader: Caroline Zhu

Secretary: Zach O'Brien

Presenters: Ivan Rudyakov, Carlos Gimeno

Head Reader: Nolan Pollack

Assistant Reader: Jacob Monticello

Secretary: Zachar Hankewycz

Section BL-1030

Presenters: Grace Miller, Nate Moore

Head Reader: Anna Maria Barbiellini Amidei

Assistant Reader: Tao Setoguchi

Secretary: Kyle Koo

Presenters: Jack Whitten, Aaron Wachowiak

Head Reader: Ty Pacchione

Assistant Reader: Max Hayashi

Secretary: Sophia Thomas

Section BL-135

Presenters: Marcus Roldan, Patricio Bentin David Mitre, Joey Kim

Head Reader: Jack Craciun

Assistant Reader: Nick Coury

Secretary: Leah Zeisner

Presenters: Nelwin Gonzalez Barreto, Dylan Huang

Head Reader: Brian Gay

Assistant Reader: Tyler Furrier

Secretary: Monroe Chung

Sunday, November 27th, 2022 7:04:56pm

Code Walks for Mon, 28 November 2022

Section MF-915

Presenters: Caroline Zhu, Alec Norrie

Head Reader: Joey Kim

Assistant Reader: Eric Yip

Secretary: Marcus Roldan Chris Tozlowski

Presenters: Henry Geng, Jack Denson

Head Reader: Luke Po

Assistant Reader: Nick Frank

Secretary: Garrett Michiels

Section MF-1030

Presenters: Kincent Lan, Zachar Hankewycz

Head Reader: Emmanuel Manolios

Assistant Reader: Kyle Chung Michael Ford

Secretary: Adam Smith

Presenters: Andrew Sayegh, Emily Smith Jacob Monticello, Nithya Balaji

Head Reader: Jason Cheung Max Leroux

Assistant Reader: Colin Rozzi

Secretary: Abby Wisnewski

Section BL-1030

Presenters: Jojo Broussard, Micaela Trzcinski

Head Reader: Sophia Thomas

Assistant Reader: Reilly Farrell

Secretary: Shannon McInnis

Presenters: Nate Moore, Grace Miller Can Ivit, Luka Jovanovic

Head Reader: Thomas Mactaggart

Assistant Reader: Kyle Koo

Secretary: Joseph Pierre-Louis

Section BL-135

Presenters: Jonathan Hsieh, Jack Craciun

Head Reader: Dario Ortiz

Assistant Reader: Deion Smith

Secretary: David Mitre

Presenters: Kane Xu, Yuxuan Qiu

Head Reader: Hussain Khalil

Assistant Reader: Andre Danahy

Secretary: Patricio Bentin

Monday, November 21st, 2022 9:22:47pm

Please see Final Code Walks for the preliminary final code walk schedule. Prof. Lerner’s will appear there soon. If you need a slot, contact your section’s instructor; cross-section pairs are code-walked in my section.

Sunday, November 20th, 2022 6:58:05pm

Code Walks for Mon, 21 November 2022

Section MF-915

Presenters: Nuocheng Wang, Chris Tozlowski

Head Reader: Nuocheng Wang Michael Guo

Assistant Reader: Ross Curcio

Secretary: Aleksander Aguilar

Presenters: Nick Selvitelli, Derek Leung

Head Reader: Akshay Dupuguntla

Assistant Reader: Aditya Selvam

Secretary: Thomas Crook

Section MF-1030

Presenters: Diego Valdivia Cox, Qishen Pang

Head Reader: Joseph Henson

Assistant Reader: Xun Xu

Secretary: Jacob Monticello

Presenters: Vedant Rautela, Bryce Devoe

Head Reader: Nithya Balaji

Assistant Reader: Caroline Zhu Stephen Magliocchino

Secretary: Carlos Gimeno

Section BL-1030

Presenters: Jaron Cui, Joseph Pierre-Louis

Head Reader: Owen Thurm

Assistant Reader: Luka Jovanovic

Secretary: Emily Minor

Presenters: Kyle Koo, Tao Setoguchi

Head Reader: Duncan Vogel

Assistant Reader: Kiran Gregerson

Secretary: Sahana Tankala

Section BL-135

Presenters: Chengyi Kuang, Jose Sulaiman

Head Reader: Dylan Huang

Assistant Reader: Alex Kerwick

Secretary: Nick Coury Alex Kerwick

Presenters: Zekai Shen, David Yan

Head Reader: Colton Williams

Assistant Reader: Eoin Flynn

Secretary: Shashwat Patel

Thursday, November 17th, 2022 1:14:12pm

Diego pointed out an unexpected result on Piazza. We went back and forth and I discovered that my counting of method calls can be considered inconsistent with the specification.

Rather than changing the spec to match the originally distributed sample tests, I adjusted my code and changed the distributed tests.

Please use the revised sample tests to probe your xbad2 script. The result for Diego test case is fixed.

Wednesday, November 16th, 2022 9:24:22pm

Code Walks for Thu, 17 November 2022

Section MF-915

Presenters: Dylan Sapienza, Luke Po

Head Reader: Aditya Selvam

Assistant Reader: Benjamin Alonzo

Secretary: Jose Sulaiman

Presenters: Nick Frank, Garrett Michiels

Head Reader: Chris Tozlowski

Assistant Reader: David Yan

Secretary: Alec Norrie

Section MF-1030

Presenters: Abby Wisnewski, Shannon McInnis

Head Reader: Max Leroux

Assistant Reader: Kyle Chung

Secretary: Michael Ford

Presenters: Xun Xu, Nolan Pollack

Head Reader: Jason Cheung

Assistant Reader: Vedant Rautela

Secretary: Adam Smith

Section BL-1030

Presenters: Kenny Jung, Max Hayashi

Head Reader: Anna Maria Barbiellini Amidei

Assistant Reader: Sahana Tankala

Secretary: Ty Pacchione

Presenters: John Walsh, Reilly Farrell

Head Reader: Dylan Burati

Assistant Reader: Grace Miller

Secretary: Jack Whitten

Section BL-135

Presenters: Brian Gay, Leah Zeisner

Head Reader: John McCarthy Monroe Chung

Assistant Reader: Kane Xu

Secretary: Deion Smith

Presenters: Nelwin Gonzalez Barreto, Dylan Huang Tyler Furrier, Evan Ritzcovan

Head Reader: Kincent Lan

Assistant Reader: Logan Morneault

Secretary: Nick Coury

Wednesday, November 16th, 2022 12:54:54pm

So far Google seems to have held up best of all sw cos. But look:

The article’s second paragraph is the key:

In other words, too many sw devs are too unproductive. (Productivity is the quotient of results over inputs, e.g., well-organized and working sw divided by dollars spent.)

As I have explained in my section time and again, sw cos hire too many sw devs because they don’t know how to interview well – and the good ones know this. But they know that when times get bad – and every decade or so they do get very bad- – they can fire the unproductive ones.

The goal of Soc. Resp. Sw Dev, the course, is to show you how to turn yourself into a highly productive sw dev.

Tuesday, November 15th, 2022 9:05:42pm

Code Walks for Wed, 16 November 2022

Section MF-915

Presenters: Kiran Gregerson, Akshay Dupuguntla

Head Reader: Michael Guo

Assistant Reader: Nuocheng Wang

Secretary: Joey Kim

Presenters: Daniel Robbins, Aditya Selvam

Head Reader: Kyle Ednie

Assistant Reader: Marcus Roldan

Secretary: Derek Leung

Section MF-1030

Presenters: Jason Cheung, Hussain Khalil

Head Reader: Vedant Rautela

Assistant Reader: Qishen Pang

Secretary: Stephen Magliocchino

Presenters: Adam Smith, Michael Ford

Head Reader: Joseph Henson

Assistant Reader: Caroline Zhu

Secretary: Carlos Gimeno

Section BL-1030

Presenters: Charles Williams, Owen Thurm

Head Reader: Jojo Broussard

Assistant Reader: Micaela Trzcinski

Secretary: Lillianna Gund

Presenters: Sophia Thomas, Vasilios Gjezo

Head Reader: Anna Maria Barbiellini Amidei

Assistant Reader: Diana Rodriguez

Secretary: Thomas Mactaggart

Section BL-135

Presenters: Eoin Flynn, Colton Williams

Head Reader: Shashwat Patel

Assistant Reader: Evan Ritzcovan

Secretary: David Mitre

Presenters: Andre Danahy, Austin Ho

Head Reader: Zekai Shen

Assistant Reader: Tyler Furrier

Secretary: Chengyi Kuang

Sunday, November 13th, 2022 7:10:31pm

Code Walks for Mon, 14 November 2022

Section MF-915

Presenters: Derek Leung, Nick Selvitelli

Head Reader: Jamie Lin

Assistant Reader: Joey Kim

Secretary: Kyle Ednie

Presenters: Aditya Selvam, Daniel Robbins Alec Norrie, Caroline Zhu

Head Reader: Benjamin Alonzo

Assistant Reader: Chris Tozlowski

Secretary: David Yan

Section MF-1030

Presenters: Max Leroux, Josef LaFranchise

Head Reader: Nolan Pollack

Assistant Reader: Emily Smith

Secretary: Justin Kwon

Presenters: Zachar Hankewycz, Kincent Lan

Head Reader: Max Leroux

Assistant Reader: Kyle Chung

Secretary: Adam Smith

Section BL-1030

Presenters: Katherine Payne, Carter Brainerd

Head Reader: Can Ivit

Assistant Reader: Max Hayashi

Secretary: Kiran Gregerson

Presenters: Ty Pacchione, Lillianna Gund

Head Reader: Shannon McInnis

Assistant Reader: Joseph Pierre-Louis

Secretary: Anna Maria Barbiellini Amidei

Section BL-135

Presenters: Shashwat Patel, Logan Morneault

Head Reader: Nick Coury

Assistant Reader: Zekai Shen

Secretary: Jason Jn Baptiste

Presenters: Jack Craciun, Jonathan Hsieh Yuxuan Qiu, Kane Xu

Head Reader: Leah Zeisner

Assistant Reader: Nelwin Gonzalez Barreto

Secretary: Austin Ho

Thursday, November 10th, 2022 1:16:24pm

You may wish to run your xbad script (7 — The Clean Up) on these sample tests.

Tuesday, November 8th, 2022 10:49:09pm

Code Walks for Wed, 9 November 2022

Section MF-915

Presenters: Ross Curcio, Garrett Michiels

Head Reader: Joey Kim

Assistant Reader: Alec Norrie

Secretary: Nick Frank

Presenters: Luke Po, Chris Tozlowski

Head Reader: Henry Geng

Assistant Reader: Eric Yip

Secretary: Michael Guo

Section MF-1030

Presenters: Aleksander Aguilar, Shannon McInnis

Head Reader: Kyle Chung

Assistant Reader: Justin Kwon

Secretary: Zach O'Brien

Presenters: Xun Xu, Max Leroux

Head Reader: Andrew Sayegh

Assistant Reader: Josef LaFranchise

Secretary: Emily Smith

Section BL-1030

Presenters: Duncan Vogel, Kyle Koo

Head Reader: Luis Soto

Assistant Reader: Nate Moore

Secretary: Katherine Payne

Presenters: Lillianna Gund, Max Hayashi

Head Reader: John Walsh

Assistant Reader: Joseph Kwilman

Secretary: Can Ivit

Section BL-135

Presenters: Nelwin Gonzalez Barreto, Leah Zeisner

Head Reader: Jason Jn Baptiste

Assistant Reader: Dario Ortiz

Secretary: Yuxuan Qiu

Presenters: Nick Coury, Alex Kerwick

Head Reader: Logan Morneault

Assistant Reader: Andre Danahy

Secretary: Brian Gay

Monday, November 7th, 2022 7:39:26am

Today it’s Meta/Facebook’s turn to announce massive layoffs, bigger than Twitter in raw numbers.

Sunday, November 6th, 2022 7:25:01pm

Code Walks for Mon, 7 November 2022

You will present your implementation for 6 — The Observer with your old partner. If you are the on-boarder and your new partner is in a different section, invite the on-boardee to attend—the code walk may reveal yet more problems than you are aware of.

Section MF-915

Presenters: David Yan, Jose Sulaiman

Head Reader: Luke Po

Assistant Reader: Ross Curcio

Secretary: Aditya Selvam

Presenters: Derek Leung, Kiran Gregerson Nuocheng Wang, Shaun Gentilin

Head Reader: Jessica Su

Assistant Reader: Akshay Dupuguntla

Secretary: Chris Tozlowski

Section MF-1030

Presenters: Bryce Devoe, Ivan Rudyakov

Head Reader: Michael Ford

Assistant Reader: Abby Wisnewski

Secretary: Joseph Henson

Presenters: Emmanuel Manolios

Head Reader: Tarif Khan

Assistant Reader: Jason Cheung

Secretary: Qishen Pang

Section BL-1030

Presenters: Micaela Trzcinski, Jack Whitten

Head Reader: Grace Miller

Assistant Reader: Aaron Wachowiak

Secretary: Diana Rodriguez

Presenters: Diana Rodriguez, Thomas Mactaggart

Head Reader: Kenny Jung

Assistant Reader: Daniel Robbins

Secretary: Anna Maria Barbiellini Amidei

Section BL-135

Presenters: Jack Craciun, Logan Morneault Tyler Furrier, Angel Gong

Head Reader: Chengyi Kuang

Assistant Reader: Zekai Shen Nick Coury

Secretary: John McCarthy

Presenters: Monroe Chung, Yolanda Jarrin

Head Reader: Brian Gay

Assistant Reader: Hussain Khalil

Secretary: Eoin Flynn

Friday, November 4th, 2022 7:42:54pm

You have received an email that introduces you to your new partner and the assigned code base.

The on-boarder should conduct an overview code inspection with the on-boardee as soon as feasible. If the latter then decides that using his/her former code base would be preferable, switch roles so that the two of you can make an informed decision.

If you jointly decide that you wish to switch the code base, the on-boarder should

collect five sample project-design decisions that illustrate why the alternative code base is preferred to the assigned one;
formulate a justification for each sample why the decision of the alternative code base is superior and a two-line executive summary of this justification;
turn these five problem descriptions into an HTML memo addressed to your section’s instructor;
For the few cross-section pairs, address the memo to both instructors.
send the memo and a request for a meeting to your section’s instructor by Saturday 08:00pm, CCing the on-boardee and the tech TA.
For the few cross-section pairs, send the email to both instructors.

To switch, you must meet with your instructor in person by Monday evening and receive the instructor’s blessing, who will then inform the technical TA to set up a new repo.

Friday, November 4th, 2022 8:54:49am

We will not run a self-evaluation for 6 — The Observer. Ignore the form that was pushed into your repository this morning.

Meanwhile, note today’s front-page WSJ headline.

Wednesday, November 2nd, 2022 9:04:48pm

Code Walks for Thu, 3 November 2022

Section MF-915

Presenters: Joey Kim, Alec Norrie

Head Reader: Nuocheng Wang

Assistant Reader: Nick Selvitelli

Secretary: Aleksander Aguilar

Presenters: Henry Geng, Eric Yip

Head Reader: Shaun Gentilin

Assistant Reader: Jack Denson

Secretary: Alec Norrie

Section MF-1030

Presenters: Colin Rozzi, Zach O'Brien

Head Reader: Diego Valdivia Cox

Assistant Reader: Jacob Monticello

Secretary: Max Leroux

Presenters: Andrew Sayegh, Kyle Chung

Head Reader: Xun Xu

Assistant Reader: Stephen Magliocchino

Secretary: Caroline Zhu

Section BL-1030

Presenters: Reilly Farrell, Owen Thurm

Head Reader: Lillianna Gund

Assistant Reader: Katherine Payne

Secretary: Jojo Broussard

Presenters: Joseph Kwilman, Nate Moore

Head Reader: Charles Williams

Assistant Reader: John Walsh

Secretary: Vasilios Gjezo

Section BL-135

Presenters: Lowell Camp, Dario Ortiz

Head Reader: Yuxuan Qiu

Assistant Reader: Leah Zeisner

Secretary: Andre Danahy

Presenters: Marcus Roldan, Jason Jn Baptiste

Head Reader: Evan Ritzcovan

Assistant Reader: Qianyong Hu

Secretary: Monroe Chung

Wednesday, November 2nd, 2022 12:40:28pm

You may wish to run your xgames script (6 — The Observer) on these sample tests.

Tuesday, November 1st, 2022 9:13:10pm

Please read up on on presenting in a top-down fashion in Presenting a Milestone.

Code Walks for Wed, 2 November 2022

Section MF-915

Presenters: Jessica Su, Jamie Lin

Head Reader: Thomas Crook

Assistant Reader: Chris Tozlowski Dylan

Secretary: Michael Guo Akshay

Presenters: Dylan Sapienza, Thomas Crook

Head Reader: Marcus Roldan

Assistant Reader: Luke Po

Secretary: Benjamin Alonzo

Section MF-1030

Presenters: Emmanuel Manolios

Head Reader: Colin Rozzi

Assistant Reader: Adam Smith

Secretary: Justin Kwon Zachar

Presenters: Michael Ford, Joseph Henson

Head Reader: Caroline Zhu

Assistant Reader: Nithya Balaji

Secretary: Ivan Rudyakov

Section BL-1030

Presenters: Daniel Robbins

Head Reader: Luka Jovanovic

Assistant Reader: Ty Marshall Dylan Burati

Secretary: Tao Setoguchi

Presenters: Tarif Khan, Emily Minor

Head Reader: Jaron Cui

Assistant Reader: Jack Whitten

Secretary: Kenny Jung

Section BL-135

Presenters: Chengyi Kuang, Zekai Shen

Head Reader: Jonathan Hsieh

Assistant Reader: Patricio Bentin

Secretary: Hussain Khalil

Presenters: Austin Ho, Eoin Flynn

Head Reader: Nelwin Gonzalez Barreto

Assistant Reader: Yolanda Jarrin

Secretary: Dylan Huang

Monday, October 31st, 2022 6:13:24pm

Revisit the constraints on the integration tests in 6 — The Observer. They have been relaxed.

Sunday, October 30th, 2022 7:20:23pm

Code Walks for Mon, 31 October 2022

Section MF-915

Presenters: Nick Frank, Kyle Ednie

Head Reader: Akshay Dupuguntla

Assistant Reader: Garrett Michiels

Secretary: Shaun Gentilin

Presenters: Benjamin Alonzo, Jack Denson

Head Reader: Eric Yip

Assistant Reader: Aleksander Aguilar

Secretary: Nuocheng Wang

Section MF-1030

Presenters: Diego Valdivia Cox, Jacob Monticello

Head Reader: Zachar Hankewycz

Assistant Reader: Tarif Khan

Secretary: Kyle Chung

Presenters: Vedant Rautela, Carlos Gimeno

Head Reader: Stephen Magliocchino

Assistant Reader: Bryce Devoe

Secretary: Emmanuel Manolios

Section BL-1030

Presenters: Lillianna Gund, Max Hayashi

Head Reader: Nate Moore

Assistant Reader: Vasilios Gjezo

Secretary: Micaela Trzcinski

Presenters: Charles Williams, John Walsh

Head Reader: Katherine Payne

Assistant Reader: Emily Minor

Secretary: Joseph Kwilman

Section BL-135

Presenters: Qianyong Hu, Yuxuan Qiu

Head Reader: Austin Ho

Assistant Reader: Kincent Lan

Secretary: Tyler Furrier

Presenters: Andre Danahy, Colton Williams

Head Reader: Evan Ritzcovan Nick Coury

Assistant Reader: Angel Gong

Secretary: Kane Xu

Thursday, October 27th, 2022 4:08:49pm

Someone asked on piazza about the following edge case for the strategy:

If a player’s current position is its current goal, should its strategy return “pass” when called in this situation?

The specification provides the answer. The goal is the first candidate that each strategy attempts to reach—with an action. The strategy returns “pass” only if no action can get the player to any of the goals, meaning both the current goal and the alternatives.

Also note that a type-setting mistake in 5 — Games! mangled the delivery instructions. Make sure to take a second look.

Wednesday, October 26th, 2022 8:44:39pm

Code Walks for Thu, 27 October 2022

Section MF-915

Presenters: Luke Po, Chris Tozlowski

Head Reader: Jack Denson

Assistant Reader: Kyle Ednie

Secretary: Thomas Crook

Presenters: Jamie Lin, Jessica Su

Head Reader: Nick Frank

Assistant Reader: Dylan Sapienza

Secretary: Marcus Roldan

Section MF-1030

Presenters: Nithya Balaji, Qishen Pang

Head Reader: Ivan Rudyakov

Assistant Reader: Zach O'Brien

Secretary: Josef LaFranchise

Presenters: Justin Kwon, Emily Smith

Head Reader: Adam Smith

Assistant Reader: Joseph Henson

Secretary: Colin Rozzi

Section BL-1030

Presenters: Can Ivit, Luka Jovanovic

Head Reader: Kenny Jung Daniel Robbins

Assistant Reader: Jaron Cui

Secretary: Ty Marshall

Presenters: Kenny Jung, Ty Pacchione

Head Reader: Tao Setoguchi

Assistant Reader: Duncan Vogel

Secretary: Luis Soto

Section BL-135

Presenters: Jonathan Hsieh, Shashwat Patel

Head Reader: Andre Danahy

Assistant Reader: Dylan Huang

Secretary: Nelwin Gonzalez Barreto

Presenters: Michael Guo, Patricio Bentin

Head Reader: Hussain Khalil

Assistant Reader: Lowell Camp

Secretary: Yolanda Jarrin

Wednesday, October 26th, 2022 8:43:38pm

Warning The definition of Gem in The Gems explicitly lists all the names (as strings) to be used for this purpose. Sadly, the tar bundle that contains these images with these specific names contains additional files whose names are not listed in this definition. If you automated the definition of treasure names by reading the file names—like I did—you need to filter out the all names that contain the string "gems". (The web page is created from the code base.)

Wednesday, October 26th, 2022 3:02:00pm

Congratulations go to Charles W. and John W. for exposing a bug in my reference implementation. And a great thanks for persistently bugging Sam about it.

Just after I had exhorted students in class and in office hours not to create tabular pieces of code by hand—such as tests—when the two of them pointed out a bug in my counter-clockwise tile rotation—and that but was due to a manual construction of the TileKeyRotation table.

I have now replaced the 11 x 4 table with the following lines of code:

; counterclockwise rotation by 90 degrees
(define TileKey90
  (hash
   NS  EW
   EW  NS
   SW  SE
   SE  EN
   EN  NW
   NW  SW
   EWS NSE
   NSE NEW
   NEW NSW
   NSW EWS
   NSEW NSEW))

#; {Hashof 1String [List 1String 1String 1String 1String]}
(define TileKeyRotation
  (local (#; {1String -> [List 1String 1String 1String 1String]}
          (define (all-rotations key0)
            (for/fold ([key key0] [r (list key0)] #:result r) ([d (rest Degrees)])
              (define next (hash-ref TileKey90 key))
              (values next (append r (list next))))))
    (make-hash (map (λ (ks) (cons (second ks) (all-rotations (second ks)))) TileKey))))

If you spot another problem, please let me know.

Wednesday, October 26th, 2022 12:14:45pm

You may wish to run your xstrategy script (5 — Games!) on these sample tests.

Important Jessica S. noticed a ambiguity in the strategy specification 4 — The Strategy. The specification of row-column enumerations used the word “tile” where “coordinate” was called for. See the revised version.

This mistake does not affect any past grades, but it will affect the upcoming test fest. If you tried to go to specific (unique) tiles instead of specific coordinates, please change your code to match the now clarified specification. (The fix should be minor in any of the chosen PLs.)

Tuesday, October 25th, 2022 9:40:56pm

Code Walks for Wed, 26 October 2022

Section MF-915

Presenters: Kiran Gregerson, Derek Leung

Head Reader: Dylan Sapienza

Assistant Reader: Jamie Lin

Secretary: Ross Curcio

Presenters: Jose Sulaiman, David Yan

Head Reader: Nick Selvitelli

Assistant Reader: Michael Guo

Secretary: Garrett Michiels

Section MF-1030

Presenters: Aleksander Aguilar, Shannon McInnis

Head Reader: Jacob Monticello

Assistant Reader: Carter Brainerd

Secretary: Bryce Devoe

Presenters: Abby Wisnewski, Stephen Magliocchino

Head Reader: Emily Smith

Assistant Reader: Nolan Pollack

Secretary: Andrew Sayegh

Section BL-1030

Presenters: Joseph Kwilman, Nate Moore

Head Reader: Reilly Farrell

Assistant Reader: Anna Maria Barbiellini Amidei

Secretary: Max Hayashi

Presenters: Grace Miller, Sophia Thomas

Head Reader: Micaela Trzcinski

Assistant Reader: Ty Pacchione

Secretary: Aaron Wachowiak

Section BL-135

Presenters: Kincent Lan, Hussain Khalil

Head Reader: Kane Xu

Assistant Reader: Jack Craciun

Secretary: Angel Gong

Presenters: Evan Ritzcovan, Nicholas Moulle-Berteaux

Head Reader: Tyler Furrier

Assistant Reader: John McCarthy

Secretary: Colton Williams

Sunday, October 23rd, 2022 9:02:44pm

Code Walks for Mon, 24 October 2022

Section MF-915

Presenters: Thomas Crook, Dylan Sapienza

Head Reader: Aleksander Aguilar

Assistant Reader: Jessica Su

Secretary: Henry Geng

Presenters: Ross Curcio, Garrett Michiels

Head Reader: Sky Wang

Assistant Reader: David Yan

Secretary: Nick Selvitelli

Section MF-1030

Presenters: Ivan Rudyakov, Bryce Devoe

Head Reader: Nithya Balaji

Assistant Reader: Andrew Sayegh

Secretary: Nolan Pollack

Presenters: Justin Kwon, Emily Smith

Michael Ford, Joseph Henson

Head Reader: Josef LaFranchise

Assistant Reader: Max Leroux

Secretary: Xun Xu

Section BL-1030

Presenters: Luis Soto, Sahana Tankala

Head Reader: Jack Whitten

Assistant Reader: Jojo Broussard

Secretary: Dylan Burati

Section BL-135

Presenters: Nelwin Gonzalez Barreto, Leah Zeisner

Head Reader: Dario Ortiz

Assistant Reader: David Mitre

Secretary: Lowell Camp

Wednesday, October 19th, 2022 8:50:21pm

Code Walks for Thu, 20 October 2022

Section MF-915

Presenters: Kiran Gregerson, Derek Leung

Head Reader: Jose Sulaiman

Assistant Reader: Ross Curcio

Secretary: Kyle Ednie

Presenters: Luke Po, Chris Tozlowski

Head Reader: Michael Guo

Assistant Reader: Aleksander Aguilar

Secretary: Joey Kim

Section MF-1030

Presenters: Emily Smith, Justin Kwon

Head Reader: Joseph Henson

Assistant Reader: Xun Xu

Secretary: Jacob Monticello

Presenters: Aleksander Aguilar, Shannon McInnis

Head Reader: Caroline Zhu

Assistant Reader: Vedant Rautela

Secretary: Adam Smith

Section BL-1030

Presenters: Carter Brainerd, Anna Maria Barbiellini Amidei

Head Reader: Max Hayashi

Assistant Reader: Luis Soto

Secretary: Daniel Robbins

Presenters: Jack Whitten, Micaela Trzcinski

Head Reader: Ty Pacchione

Assistant Reader: Sophia Thomas

Secretary: Reilly Farrell

Section BL-135

Presenters: Tyler Furrier, Angel Gong

Head Reader: Qianyong Hu

Assistant Reader: Colton Williams

Secretary: Kincent Lan

Presenters: Kane Xu, John McCarthy

Head Reader: Eoin Flynn

Assistant Reader: Chengyi Kuang

Secretary: Evan Ritzcovan

Wednesday, October 19th, 2022 12:34:46pm

You may wish to run your xstate script (4 — The Strategy) on these sample tests.

Tuesday, October 18th, 2022 9:17:46pm

Code Walks for Wed, 19 October 2022

Section MF-915

Presenters: Nick Selvitelli, Akshay Dupuguntla

Head Reader: David Yan

Assistant Reader: Henry Geng

Secretary: Eric Yip

Presenters: Nuocheng Wang, Shaun Gentilin

Head Reader: Garrett Michiels

Assistant Reader: Thomas Crook

Secretary: Dylan Sapienza

Section MF-1030

Presenters: Simar Chadha, Tarif Khan

Head Reader: Carlos Gimeno

Assistant Reader: Zachar Hankewycz

Secretary: Jason Cheung

Presenters: Andrew Sayegh, Kyle Chung

Head Reader: Bryce Devoe

Assistant Reader: Michael Ford

Secretary: Nithya Balaji

Section BL-1030

Presenters: Vasilios Gjezo, Joseph Pierre-Louis

Head Reader: Diana Rodriguez

Assistant Reader: Thomas Mactaggart

Secretary: Charles Williams

Presenters: Ty Marshall, Kelli Therrien

Head Reader: Sahana Tankala

Assistant Reader: Owen Thurm

Secretary: John Walsh

Section BL-135

Presenters: Brian Gay, Dylan Huang

Head Reader: Lowell Camp

Assistant Reader: Yuxuan Qiu

Secretary: Dario Ortiz

Presenters: Deion Smith, David Mitre

Head Reader: Angel Gong

Assistant Reader: Austin Ho

Secretary: Leah Zeisner

Monday, October 17th, 2022 8:25:59am

Sunday, October 16th, 2022 9:06:32pm

Code Walks for 17 October 2022

Section MF-915

Presenters: Joey Kim, Alec Norrie

Head Reader: Chris Tozlowski

Assistant Reader: Jose Sulaiman

Secretary: Sky Wang

Presenters: Nick Frank, Kyle Ednie

Head Reader: Ross Curcio

Assistant Reader: Derek Leung

Secretary: Jack Denson

Section MF-1030

Presenters: Colin Rozzi, Zach O'Brien

Head Reader: Carter Brainerd

Assistant Reader: Diego Valdivia Cox

Secretary: Justin Kwon

Presenters: Adam Smith, Caroline Zhu

Head Reader: Qishen Pang

Assistant Reader: Ivan Rudyakov

Secretary: Vedant Rautela

Section BL-1030

Presenters: Jaron Cui, Tao Setoguchi

Head Reader: Aaron Wachowiak

Assistant Reader: Shannon McInnis

Secretary: Luka Jovanovic

Presenters: Duncan Vogel, Kyle Koo

Head Reader: Joseph Kwilman

Assistant Reader: Can Ivit

Secretary: Nate Moore

Section BL-135

Presenters: Nick Coury, Alex Kerwick

Head Reader: Patricio Bentin

Assistant Reader: Monroe Chung

Secretary: Jonathan Hsieh

Presenters: Logan Morneault, Jack Craciun

Head Reader: Yolanda Jarrin

Assistant Reader: Jason Jn Baptiste

Secretary: Shashwat Patel

Friday, October 14th, 2022 6:48:53pm

Why 0? Code that uses null (or none) as an option element or a value that leaks (in a PL without protection) is a negative contribution to the code base. Some time later, a responsible developer will have to remove this bad code from the code base. To warn you now about such bad choices, we have decided to ask the TAs to deduct all points for such uses of null in code for 2 — The Board.

Why no points for an accurate self-eval? We made a mistake with the rubric and forgot to allocate points for the self-evaluation step for 2 — The Board. We will correct this mistake and ask the TAs to assess the value of your self-evaluations and assign the appropriate number of points.

Wednesday, October 12th, 2022 11:54:50pm

Code Walks for 13 October 2022

Section MF-915

Presenters: Henry Geng, Eric Yip

Head Reader: Kiran Gregerson

Assistant Reader: Shaun Gentilin

Secretary: Akshay Dupuguntla

Presenters: Michael Guo, Patricio Bentin

Head Reader: Dylan Sapienza

Assistant Reader: Nick Selvitelli

Secretary: David Yan

Section MF-1030

Presenters: Jason Cheung, Zachar Hankewycz

Head Reader: Abby Wisnewski

Assistant Reader: Carlos Gimeno

Secretary: Tarif Khan

Presenters: Adam Smith, Caroline Zhu

Head Reader: Qishen Pang

Assistant Reader: Ivan Rudyakov

Secretary: Vedant Rautela

Section BL-1030

Presenters: Thomas Mactaggart, Diana Rodriguez

Head Reader: Vasilios Gjezo

Assistant Reader: Charles Williams

Secretary: Jaron Cui

Presenters: Duncan Vogel, Kyle Koo

Head Reader: Joseph Kwilman

Assistant Reader: Can Ivit

Secretary: Nate Moore

Section BL-135

Presenters: Dario Ortiz, Lowell Camp

Head Reader: David Mitre

Assistant Reader: Brian Gay

Secretary: Zekai Shen

Presenters: Colton Williams, Andre Danahy

Head Reader: Nick Coury

Assistant Reader: Kincent Lan

Secretary: Jack Craciun

Wednesday, October 12th, 2022 12:08:26pm

You may wish to run your xboard script (3 — The State) on these sample tests.

Tuesday, October 11th, 2022 11:28:26pm

Code Walks for 12 October 2022

Section MF-915

Presenters: Benjamin Alonzo, Jack Denson

Head Reader: Alec Norrie

Assistant Reader: Nick Frank

Secretary: Jessica Su

Presenters: Aditya Selvam, Sky Wang

Head Reader: Derek Leung

Assistant Reader: Nuocheng Wang

Secretary: Luke Po

Section MF-1030

Presenters: Josef LaFranchise, Nolan Pollack

Head Reader: Zach O'Brien

Assistant Reader: Alex Choung Colin Rozzi

Secretary: Diego Valdivia Cox

Presenters: Xun Xu, Max Leroux

Head Reader: Justin Kwon

Assistant Reader: Emmanuel Manolios

Secretary: Carter Brainerd

Section BL-1030

Presenters: Katherine Payne, Dylan Burati

Head Reader: Joseph Pierre-Louis

Assistant Reader: Kenny Jung

Secretary: Duncan Vogel

Presenters: Jojo Broussard, Aaron Wachowiak

Head Reader: Emily Minor

Assistant Reader: Lillianna Gund

Secretary: Grace Miller

Section BL-135

Presenters: Yolanda Jarrin, Monroe Chung

Head Reader: Alex Kerwick

Assistant Reader: Shashwat Patel

Secretary: Logan Morneault

Presenters: Marcus Roldan, Jason Jn Baptiste

Head Reader: Nicholas Moulle-Berteaux

Assistant Reader: Jonathan Hsieh

Secretary: Patricio Bentin

Saturday, October 8th, 2022 11:09:20am

After scanning the sampled questions and sprints, we decided not to grade the memos for 1 — The Analysis. We will subtract the 40 points for this step from the denominator for the approximately 2200 total points allocated to homework grading.

As some of you have noticed, I accidentally released 3 — The State a day too early. Those who did notice had the distinct advantage of seeing the solution for the design memo written down in plain English. While this form isn’t exactly what is expected, it injects a distinct unfairness (in the traditional sense of the word) into the process. The TAs will evaluate your design memo as if I hadn’t made a mistake. Your total grade for the design memo will display as a 0 though and we will subtract the 25 points allocated to this memo from the denominator, too.

Monday, October 3rd, 2022 8:54:09am

It’s October and you survived the “finger exercises” of Sw Dev. But did you actually do them in the expected manner? Did you find the libraries that turn these problems into “10 liners”? That make these solutions robust enough to scale? If not, you have fallen behind and you should use the relative calm of this week to go back and re-do these exercises in peace.

Sunday, October 2nd, 2022 9:14:31pm

Code Walks for 03 October 2022

Section MF-915

Presenters: Shaun Gentilin, Nuocheng Wang

Head Reader: Alec Norrie

Assistant Reader: David Yan

Secretary: Jose Manzur

Presenters: Eric Yip, Henry Geng

Head Reader: Luke Po

Assistant Reader: Michael Guo

Secretary: Jessica Su

Section MF-1030

Presenters: Diego Valdivia Cox, Jacob Monticello

Head Reader: Max Leroux

Assistant Reader: Carlos Gimeno

Secretary: Zach O'Brien

Presenters: Emmanuel Manolios

Head Reader: Qishen Pang

Assistant Reader: Xun Xu

Secretary: Caroline Zhu

Section BL-1030

Presenters: Charles Williams, John Walsh

Head Reader: Jack Whitten

Assistant Reader: Kelli Therrien

Secretary: Jaron Cui

Presenters: Thomas Mactaggart, Diana Rodriguez

Head Reader: Can Ivit

Assistant Reader: Vasilios Gjezo

Secretary: Dylan Burati

Section BL-135

Presenters: Nelwin Gonzalez Barreto, Leah Zeisner

Head Reader: Yuxuan Qiu

Assistant Reader: Nicholas Moulle-Berteaux

Secretary: Jonathan Hsieh

Presenters: Hussain Khalil, Kincent Lan

Head Reader: Dylan Huang

Assistant Reader: Zekai Shen

Secretary: Brian Gay

Thursday, September 29th, 2022 5:52:09pm

Due to a glitch in the daemon script, the self-eval forms did not get posted until just before 10:00am. We will therefore harvest the forms just before midnight this time.

Wednesday, September 28th, 2022 10:42:03pm

Note If you work by yourself (because your partner dropped or you never had a partner), please make sure to inform Sam, the head TA.

Code Walks for 29 September 2022

Section MF-915

Presenters: Garrett Michiels, Ross Curcio

Head Reader: Nuocheng Wang

Assistant Reader: Kyle Ednie

Secretary: Luke Po

Presenters: Jamie Lin, Jessica Su

Head Reader: Ross Curcio

Assistant Reader: Nick Selvitelli

Secretary: Shaun Gentilin

Section BL-135

Presenters: Logan Morneault, Jack Craciun

Head Reader: Nelwin Gonzalez Barreto

Assistant Reader: Hussain Khalil

Secretary: Yuxuan Qiu

Presenters: Jonathan Hsieh, Shashwat Patel

Head Reader: Chengyi Kuang

Assistant Reader: Jason Jn Baptiste

Secretary: David Mitre

Section MF-1030

Presenters: Vedant Rautela, Carlos Gimeno

Head Reader: Diego Valdivia Cox

Assistant Reader: Zach O'Brien

Secretary: Qishen Pang

Presenters: Max Leroux, Xun Xu

Head Reader: Caroline Zhu

Assistant Reader: Jason Cheung

Secretary: Jacob Monticello

Section BL-1030

Presenters: Emily Minor, Daniel Robbins

Head Reader: Micaela Trzcinski

Assistant Reader: Joseph Kwilman

Secretary: Grace Miller

Presenters: Reilly Farrell, Owen Thurm

Head Reader: Ty Marshall

Assistant Reader: Katherine Payne

Secretary: Vasilios Gjezo

Tuesday, September 27th, 2022 9:08:29pm

Code Walks for 28 September 2022

Section MF-915

Presenters: Jose Manzur, David Yan

Head Reader: Akshay Dupuguntla

Assistant Reader: Jamie Lin

Secretary: Alec Norrie

Presenters: Garrett Michiels, Ross Curcio

Head Reader: Nuocheng Wang

Assistant Reader: Kyle Ednie

Secretary: Luke Po

Section MF-1030

Presenters: Max Leroux, Xun Xu

Head Reader: Caroline Zhu

Assistant Reader: Jason Cheung

Secretary: Jacob Monticello

Presenters: Vedant Rautela, Carlos Gimeno

Head Reader: Diego Valdivia Cox

Assistant Reader: Zach O'Brien

Secretary: Qishen Pang

Section BL-1030

Presenters: Kelli Therrien, Ty Marshall

Head Reader: Dylan Burati

Assistant Reader: Jaron Cui

Secretary: Jack Whitten

Presenters: Can Ivit, Luka Jovanovic

Head Reader: Thomas Mactaggart

Assistant Reader: Charles Williams

Secretary: Lillianna Gund

Section BL-135

Presenters: Dylan Huang, Brian Gay

Head Reader: Hussain Khalil

Assistant Reader: David Mitre

Secretary: Simar Gursimar

Presenters: Chengyi Kuang, Zekai Shen

Head Reader: Jason Jn Baptiste

Assistant Reader: Logan Morneault

Secretary: Shashwat Patel

Tuesday, September 27th, 2022 10:03:47am

Someone asked me yesterday how I learned to write (in English, as an immigrant). My answer addressed the “negative feedback” part of an improvement cycle, not the “positive energy” part.

Reading literature and books on writing is the essence of the second half of my answer. Reading good literature helps you understand writing somewhat; see Hemingway’s description of his torturous procedures of writing individual paragraphs (in his Paris novels).

Reading books on writing is a good start, which is why I list Strunk and White on the Readings page. An alternative is

which, as the title suggests, originates in computer science. Which books are helpful depends on your situation and goals.

Saturday, September 24th, 2022 6:55:31pm

The transformation of textual information into internal data is known as parsing, a technical problem that spawned an entire research area. Parsing is so complex, it should never be used in an introductory course but to this day, many such courses assign programs that read text, analyze it, and react to it—without proper support. Proper coverage is offered in Compilers and Theory, and these two course will help you design parsing programs systematically.

At first glance, JSON is a simple notation for writing down information in terms of Booleans, Strings, Numbers, arrays of JSON expressions, and objects of JSON expressions. But, as it turns out, turning JSON information into internal data is a minefield; indeed, no two JSON parsers seem to accept the same, non-simple JSON inputs.

You should keep this fact in mind for your upcoming co-op and future employment.

In case you need an example of the problems that such complexity – due to simple-looking notation – can cause, read up on how JSON reading can bring down Windows.

Friday, September 23rd, 2022 9:12:53am

A Diversion On Wednesday I briefly addressed the difference between arbitrarily large and infinite in my section—mentioning transfinite ordinals such as ω and ε0 (which is used to prove the theoretical totality of a Java-like type system).

In response Ben pointed me to a fun video that explains this idea at an intuitive level. Enjoy!

Monday, September 19th, 2022 8:00:00am

Please read Egoless Programming. It is the only required reading text this semester.

Thursday, September 15th, 2022 6:43:54am

A student came to my office hours last night with questions about the teaching philosophy behind the course and the core curriculum. For anyone who’s interested in this question on how to design a core programming curriculum, please visit

Developing Developers

Tuesday, September 13th, 2022 6:01:40pm

B — The Very Basics explicitly requests that you deliver solutions on the master branch of your git repository. Only 16 out of 70 of Sam’s “reports” followed these instructions. If this were a company and Sam a manager with 70 “reports,” this would simply be unacceptable.

Sam asked me not to deduct points. He worked around this problem.

Tuesday, August 9th, 2022 2:19:59pm

Welcome to Software Development Fall 2022.

See Abstract for a concise course description.

The quote at the top of the page characterizes how the instructors will lead this course as professionals. They firmly embrace the idea that if you pay a lot of money for education, the instructors have an obligation to deliver as much value as possible. The course is an intensive experience.

If you choose to take the course, familiarize yourself with the web site as quickly as possible. For the first couple of weeks, —TAHBPL will grow every couple of days; after that, —Project Milestones will evolve every week. Any out-of-the-ordinary changes will be announced on this front page.

Since most of you are too young to remember the massive crashes of the tech industry that your instructors have experienced, here is a collection of recent headlines.

Every year the course comes with a different theme song, usually from someone who recently died. (Yes your lead instructor is that old.) Well, Tom Petty died some years back but the song’s title is still a good theme.

I Won’t Back Down.

Alternatively, watch a tribute version from Fenway Park.

contents ← prev up next →

	Abstract
	Final Code Walks
	General
	Staff
	Readings
	Communicate
	Lab Book
	In-Class Reviews
	Presenting a Milestone
	Assignments, Overview
	—Delivery
	—Make
	—Read Me
	—Test Me
	—Debugging
	—Late Policy
	—Code Grades
	Assignments, Actual
	—TAHBPL
	—Project Milestones