A202/A598/A290/A590 Introduction to Programming II

Why we practice self-assessment after each exam:

"Critical thinking is thinking that assesses itself. To the extent that our students need us to tell them how well they are doing, they are not thinking critically. Didactic instruction makes students overly dependent on the teacher. In such instruction, students rarely develop any perceptible intellectual independence and typically have no intellectual standards to assess their thinking with. Instruction that fosters a disciplined, thinking mind, on the other hand, is 180 degrees in the opposite direction. [...]" (Read more).

Why there is no curve in this class:

We hold these truths to be self-evident: (a) That all students are intrinsically motivated to learn but learn to be unmotivated if they repeatedly fail; (b) That every student has the basic needs to belong, to be competent and to influence what happens to them; motivation to learn only exists when these three conditions are satisfied; (c) Learning is hard, expensive (in terms of effort) and involves taking risks, so it is imperative that students need to perceive the classroom as a safe environment both from a physical and psychological perspective. Finally, and this is in fact the crux of the matter here and in the rest of higher-education, high self-esteem should not be a goal, but rather a result (or a consequence), that comes with the mastery of challenging tasks.

We will never curve your scores artificially (either higher or lower). But we will always allow you to make up exams and assignments to score as high as you can in this class. We will never artificially inflate performance (out of respect for you and ourselves) and we will always provide opportunities to show you have grown into a more effective and skilled programmer and problem-solver.

-bash-4.2$ node exercise.js I am starting. I am retrieving state. I need to initialize. Initialize state. Here I am. QuizState { message: 'Welcome', n1: 57, n2: 95, m1: 0, m2: 0 } Welcome 102 you entered: [102] I am starting. I am retrieving state. I need to update... No, 57 + 95 != 102 QuizState { message: '(0/1) 45 + 81 = ... ', n1: 45, n2: 81, m1: 0, m2: 1 } (0/1) 45 + 81 = ... 126 you entered: [126] I am starting. I am retrieving state. I need to update... Yes, 45 + 81 = 126 QuizState { message: '(1/2) 54 + 4 = ... ', n1: 54, n2: 4, m1: 1, m2: 2 } (1/2) 54 + 4 = ... 58 you entered: [58] I am starting. I am retrieving state. I need to update... Yes, 54 + 4 = 58 QuizState { message: '(2/3) 78 + 18 = ... ', n1: 78, n2: 18, m1: 2, m2: 3 } (2/3) 78 + 18 = ... 100 you entered: [100] I am starting. I am retrieving state. I need to update... No, 78 + 18 != 100 QuizState { message: '(2/4) 41 + 7 = ... ', n1: 41, n2: 7, m1: 2, m2: 4 } (2/4) 41 + 7 = ... -bash-4.2$ pwd /u/dgerman/apache/htdocs/a202/fall2017/11292017

-bash-4.2$ cd a202-workspace/ -bash-4.2$ mkdir thanksgiving -bash-4.2$ cd thanksgiving/ -bash-4.2$ pwd /u/dgerman/a202-workspace/thanksgiving bash-4.2$ cp /l/www/classes/a348/fall2014/sample-code/nodejs-mongodb-angularjs-web-development-master.zip . -bash-4.2$ ls -l total 8128 -rw-r--r-- 1 dgerman faculty 6088678 Nov 17 10:07 nodejs-mongodb-angularjs-web-development-master.zip -bash-4.2$ unzip nodejs-mongodb-angularjs-web-development-master.zip [...] -bash-4.2$ -bash-4.2$ pwd /u/dgerman/a202-workspace/thanksgiving -bash-4.2$ ls -l total 5952 drwxr-xr-x 31 dgerman faculty 4096 Oct 31 2014 nodejs-mongodb-angularjs-web-development-master -rw-r--r-- 1 dgerman faculty 6088678 Nov 17 10:07 nodejs-mongodb-angularjs-web-development-master.zip -bash-4.2$ rm nodejs-mongodb-angularjs-web-development-master.zip -bash-4.2$ ls -l total 4 drwxr-xr-x 31 dgerman faculty 4096 Oct 31 2014 nodejs-mongodb-angularjs-web-development-master -bash-4.2$ cd nodejs-mongodb-angularjs-web-development-master/ -bash-4.2$ ls ch03 ch05 ch07 ch09 ch13 ch15 ch17 ch19 ch21 ch23 ch25 ch26-google-auth ch28 images node_modules ch04 ch06 ch08 ch10 ch14 ch16 ch18 ch20 ch22 ch24 ch26 ch27 ch29 lib README.md -bash-4.2$

-bash-4.2$ pwd /u/dgerman/a202-workspace/thanksgiving/nodejs-mongodb-angularjs-web-development-master/ch28 -bash-4.2$ ls -l total 16 -rw-r--r-- 1 dgerman faculty 2708 Oct 31 2014 cart_init.js -rw-r--r-- 1 dgerman faculty 860 Oct 31 2014 cart_routes.js -rw-r--r-- 1 dgerman faculty 467 Oct 31 2014 cart_server.js drwxr-xr-x 2 dgerman faculty 108 Oct 31 2014 controllers drwxr-xr-x 2 dgerman faculty 34 Oct 31 2014 models drwxr-xr-x 4 dgerman faculty 4096 Oct 31 2014 static drwxr-xr-x 2 dgerman faculty 34 Oct 31 2014 views -bash-4.2$

-bash-4.2$ mongo silo.cs.indiana.edu:31242 MongoDB shell version: 2.6.12 connecting to: silo.cs.indiana.edu:31242/test > show dbs admin (empty) cart 0.078GB local 0.078GB > use cart switched to db cart > show collections customers orders products system.indexes > var customers = db.getCollection("customers"); > customers.find() { "_id" : ObjectId("5a0e75f3d863a4b7d247dc41"), "userid" : "customerA", "cart" : [ ], "billing" : [ { "expireyear" : 2020, "expiremonth" : 1, "number" : "1234567890", "name" : "Customer A", "cardtype" : "Visa", "address" : [ { "zip" : "55555", "state" : "CA", "city" : "My Town", "address" : "Somewhere", "name" : "Customer A" } ] } ], "shipping" : [ { "zip" : "55555", "state" : "CA", "city" : "My Town", "address" : "Somewhere", "name" : "Customer A" } ], "__v" : 0 } > var orders = db.getCollection("orders"); > orders.find() { "_id" : ObjectId("5a0e75f3d863a4b7d247dc42"), "userid" : "customerA", "timestamp" : ISODate("2017-11-17T05:38:59.934Z"), "status" : "Pending", "billing" : [ { "expireyear" : 2020, "expiremonth" : 1, "number" : "1234567890", "name" : "Customer A", "cardtype" : "Visa", "address" : [ { "zip" : "55555", "state" : "CA", "city" : "My Town", "address" : "Somewhere", "name" : "Customer A" } ] } ], "shipping" : [ { "zip" : "55555", "state" : "CA", "city" : "My Town", "address" : "Somewhere", "name" : "Customer A" } ], "items" : [ { "quantity" : 1, "product" : [ { "_id" : ObjectId("5a0e75f3d863a4b7d247dc43"), "instock" : 4, "description" : "View of the breathtaking Delicate Arch in Utah", "price" : 12.34, "imagefile" : "arch.jpg", "name" : "Delicate Arch Print", "__v" : 0 } ] }, { "quantity" : 1, "product" : [ { "_id" : ObjectId("5a0e75f3d863a4b7d247dc44"), "instock" : 4, "description" : "View of a tropical lake backset by a volcano", "price" : 45.45, "imagefile" : "volcano.jpg", "name" : "Volcano Print", "__v" : 0 } ] }, { "quantity" : 1, "product" : [ { "_id" : ObjectId("5a0e75f3d863a4b7d247dc45"), "instock" : 5, "description" : "Look at the amazing architecture of early America.", "price" : 38.52, "imagefile" : "pyramid.jpg", "name" : "Tikal Structure Print", "__v" : 0 } ] }, { "quantity" : 1, "product" : [ { "_id" : ObjectId("5a0e75f3d863a4b7d247dc46"), "instock" : 10, "description" : "Vivid color, crystal clear water from glacial runoff.", "price" : 77.45, "imagefile" : "lake.jpg", "name" : "Glacial Lake Print", "__v" : 0 } ] } ], "__v" : 4 } { "_id" : ObjectId("5a0e762900a677cad2aedc55"), "userid" : "customerA", "timestamp" : ISODate("2017-11-17T05:39:53.985Z"), "status" : "Pending", "billing" : [ { "address" : [ ] } ], "shipping" : [ null ], "items" : [ { "quantity" : 2, "product" : [ { "_id" : ObjectId("5a0e75f3d863a4b7d247dc43"), "name" : "Delicate Arch Print", "imagefile" : "arch.jpg", "price" : 12.34, "description" : "View of the breathtaking Delicate Arch in Utah", "instock" : 4, "__v" : 0 } ] } ], "__v" : 0 } { "_id" : ObjectId("5a0e764500a677cad2aedc56"), "userid" : "customerA", "timestamp" : ISODate("2017-11-17T05:40:21.954Z"), "status" : "Pending", "billing" : [ { "address" : [ ] } ], "shipping" : [ null ], "items" : [ { "quantity" : 1, "product" : [ { "_id" : ObjectId("5a0e75f3d863a4b7d247dc45"), "name" : "Tikal Structure Print", "imagefile" : "pyramid.jpg", "price" : 38.52, "description" : "Look at the amazing architecture of early America.", "instock" : 5, "__v" : 0 } ] } ], "__v" : 0 } { "_id" : ObjectId("5a0e766200a677cad2aedc57"), "userid" : "customerA", "timestamp" : ISODate("2017-11-17T05:40:50.243Z"), "status" : "Pending", "billing" : [ { "address" : [ ] } ], "shipping" : [ null ], "items" : [ { "quantity" : 12, "product" : [ { "_id" : ObjectId("5a0e75f3d863a4b7d247dc45"), "instock" : 5, "description" : "Look at the amazing architecture of early America.", "price" : 38.52, "imagefile" : "pyramid.jpg", "name" : "Tikal Structure Print", "__v" : 0 } ] } ], "__v" : 0 } > var products = db.getCollection("products"); > products.find() { "_id" : ObjectId("5a0e75f3d863a4b7d247dc43"), "name" : "Delicate Arch Print", "imagefile" : "arch.jpg", "price" : 12.34, "description" : "View of the breathtaking Delicate Arch in Utah", "instock" : 4, "__v" : 0 } { "_id" : ObjectId("5a0e75f3d863a4b7d247dc44"), "name" : "Volcano Print", "imagefile" : "volcano.jpg", "price" : 45.45, "description" : "View of a tropical lake backset by a volcano", "instock" : 4, "__v" : 0 } { "_id" : ObjectId("5a0e75f3d863a4b7d247dc45"), "name" : "Tikal Structure Print", "imagefile" : "pyramid.jpg", "price" : 38.52, "description" : "Look at the amazing architecture of early America.", "instock" : 5, "__v" : 0 } { "_id" : ObjectId("5a0e75f3d863a4b7d247dc46"), "name" : "Glacial Lake Print", "imagefile" : "lake.jpg", "price" : 77.45, "description" : "Vivid color, crystal clear water from glacial runoff.", "instock" : 10, "__v" : 0 } > exit bye -bash-4.2$

[beixlei@silo 11162016]$ cat convert.js // " ( ( ( 3 - 2 ) + 2 ) / ( ( 1 + 8 ) - ( 2 + 3 ) ) ) " function convert( input ) { console.log( " --> " + input ); var result = input.match( /^(.*)$(.*?)$(.*)$/ ); if (result == null) { return input; } else { return convert( result[1] + "[" + result[2] + "]" + result[3] ); } } console.log( convert( " ( ( 1 + 2 ) + ( 3 + 4 ) ) " ) ); console.log( convert (" ( ( ( 3 - 2 ) + 2 ) / ( ( 1 + 8 ) - ( 2 + 3 ) ) ) ") ); [beixlei@silo 11162016]$ node convert.js --> ( ( 1 + 2 ) + ( 3 + 4 ) ) --> ( ( 1 + 2 ) + [ 3 + 4 ] ) --> ( [ 1 + 2 ] + [ 3 + 4 ] ) --> [ [ 1 + 2 ] + [ 3 + 4 ] ] [ [ 1 + 2 ] + [ 3 + 4 ] ] --> ( ( ( 3 - 2 ) + 2 ) / ( ( 1 + 8 ) - ( 2 + 3 ) ) ) --> ( ( ( 3 - 2 ) + 2 ) / ( ( 1 + 8 ) - [ 2 + 3 ] ) ) --> ( ( ( 3 - 2 ) + 2 ) / ( [ 1 + 8 ] - [ 2 + 3 ] ) ) --> ( ( ( 3 - 2 ) + 2 ) / [ [ 1 + 8 ] - [ 2 + 3 ] ] ) --> ( ( [ 3 - 2 ] + 2 ) / [ [ 1 + 8 ] - [ 2 + 3 ] ] ) --> ( [ [ 3 - 2 ] + 2 ] / [ [ 1 + 8 ] - [ 2 + 3 ] ] ) --> [ [ [ 3 - 2 ] + 2 ] / [ [ 1 + 8 ] - [ 2 + 3 ] ] ] [ [ [ 3 - 2 ] + 2 ] / [ [ 1 + 8 ] - [ 2 + 3 ] ] ] [beixlei@silo 11162016]$

[beixlei@silo 11162016]$ cat convert.js // " ( ( ( 3 - 2 ) + 2 ) / ( ( 1 + 8 ) - ( 2 + 3 ) ) ) " function convert( input ) { console.log( " --> " + input ); var result = input.match( /^(.*)$(.*?)$(.*)/ ); // ---- ----- ---- // ^ resu^lt[2] ^ // result[1] result[3] if (result == null) { return input; } else { var b = result[2]; var c = b.match( /^\s*(\d+)\s*(.)\s*(\d+)\s*$/ ); // number plus number if (c == null) { // if it doesn't we need to try other patterns c = b.match( /^\s*(\[.*?\])\s*(.)\s*(\[.*?\])\s*$/ ); // looking for [ ... ] + [ ... ] if (c == null) { // if this does not match I can try to more patterns c = b.match( /^\s*(\[.*?\])\s*(.)\s*(\d+)\s*$/ ); // I try now [ ... ] + number if (c == null) { // if this doesn't work the last one I try is c = b.match( /^\s*(\d+)\s*(.)\s*(\[.*?\])\s*$/ ); // number + [ ... ] if (c == null) return " bleah "; // if this fails too I am sorry for the user (their expression was wrong!) // some better error checking would be great (perhaps) // if I get here though the fourth pattern matched } // the third pattern matched } // the second pattern matched } // the first pattern matched // if I get here it did match somehow so I can rewrite it var d = result[1] + "[" + c[2] + " " + c[1] + " " + c[3] + "]" + result[3]; console.log( " **( " + d ); return convert( d ); // same pattern only this time we also rearrange the operators and the operands } } console.log( convert( " ( ( 1 + 2 ) + ( 3 + 4 ) ) " ) ); console.log( convert (" ( ( ( 3 - 2 ) + 2 ) / ( ( 1 + 8 ) - ( 2 + 3 ) ) ) ") ); [beixlei@silo 11162016]$ node convert.js --> ( ( 1 + 2 ) + ( 3 + 4 ) ) **( ( ( 1 + 2 ) + [+ 3 4] ) --> ( ( 1 + 2 ) + [+ 3 4] ) **( ( [+ 1 2] + [+ 3 4] ) --> ( [+ 1 2] + [+ 3 4] ) **( [+ [+ 1 2] [+ 3 4]] --> [+ [+ 1 2] [+ 3 4]] [+ [+ 1 2] [+ 3 4]] --> ( ( ( 3 - 2 ) + 2 ) / ( ( 1 + 8 ) - ( 2 + 3 ) ) ) **( ( ( ( 3 - 2 ) + 2 ) / ( ( 1 + 8 ) - [+ 2 3] ) ) --> ( ( ( 3 - 2 ) + 2 ) / ( ( 1 + 8 ) - [+ 2 3] ) ) **( ( ( ( 3 - 2 ) + 2 ) / ( [+ 1 8] - [+ 2 3] ) ) --> ( ( ( 3 - 2 ) + 2 ) / ( [+ 1 8] - [+ 2 3] ) ) **( ( ( ( 3 - 2 ) + 2 ) / [- [+ 1 8] [+ 2 3]] ) --> ( ( ( 3 - 2 ) + 2 ) / [- [+ 1 8] [+ 2 3]] ) **( ( ( [- 3 2] + 2 ) / [- [+ 1 8] [+ 2 3]] ) --> ( ( [- 3 2] + 2 ) / [- [+ 1 8] [+ 2 3]] ) **( ( [+ [- 3 2] 2] / [- [+ 1 8] [+ 2 3]] ) --> ( [+ [- 3 2] 2] / [- [+ 1 8] [+ 2 3]] ) **( [/ [+ [- 3 2] 2] [- [+ 1 8] [+ 2 3]]] --> [/ [+ [- 3 2] 2] [- [+ 1 8] [+ 2 3]]] [/ [+ [- 3 2] 2] [- [+ 1 8] [+ 2 3]]] [beixlei@silo 11162016]$

-bash-4.2$ cat q15.js function fun(base, elem) { console.log("Doing fun(", base, ",", elem, ") now. Result:", (elem - base)); return elem - base; } var a = [3, 2, 1]; console.log(a.reduce(fun, 5)); console.log( (fun(fun(fun(5, 3), 2), 1)) ) -bash-4.2$ node q15.js Doing fun( 5 , 3 ) now. Result: -2 Doing fun( -2 , 2 ) now. Result: 4 Doing fun( 4 , 1 ) now. Result: -3 -3 Doing fun( 5 , 3 ) now. Result: -2 Doing fun( -2 , 2 ) now. Result: 4 Doing fun( 4 , 1 ) now. Result: -3 -3 -bash-4.2$

-bash-4.2$ pico -w shell.js -bash-4.2$ ls -ld shell.js -rw-r--r-- 1 dgerman faculty 280 Apr 12 13:52 shell.js -bash-4.2$ cat shell.js var stdin = process.openStdin(); process.stdout.write("htdp3e> "); stdin.addListener("data", function(input) { if (input.toString().trim() == "bye") process.exit(); console.log("you entered: [" + input.toString().trim() + "]"); process.stdout.write("htdp3e> "); }); -bash-4.2$ which node /usr/bin/node -bash-4.2$ node shell.js htdp3e> 1 you entered: [1] htdp3e> (define a 3) you entered: [(define a 3)] htdp3e> oh, man... you entered: [oh, man...] htdp3e> quit you entered: [quit] htdp3e> bye -bash-4.2$

-bash-4.2$ pwd /u/dgerman/a202-workspace -bash-4.2$ ls -ld twelve.js -rw-r--r-- 1 dgerman faculty 438 Sep 6 11:50 twelve.js -bash-4.2$ cat twelve.js class Horse { constructor(name) { this.name = name; } talk() { console.log( "I am a Horse, my name is " + this.name ); } } var a = new Horse("Leslie"); a.talk(); class Unicorn extends Horse { constructor(name) { super(name); // constructor chaining } talk() { super.talk(); console.log("Je suis une licorne, je m'appelle: " + this.name); } } var b = new Unicorn("Francois"); b.talk(); -bash-4.2$ node twelve.js I am a Horse, my name is Leslie I am a Horse, my name is Francois Je suis une licorne, je m'appelle: Francois -bash-4.2$

-bash-4.2$ pwd /u/dgerman/a202-workspace/08282017 -bash-4.2$ ls -l total 16 -rw-r--r-- 1 dgerman faculty 22 Aug 28 14:08 monday.html drwxr-xr-x 26 dgerman faculty 4096 Aug 28 14:06 node_modules -rw-r--r-- 1 dgerman faculty 192 Aug 28 14:06 server.js -rw-r--r-- 1 dgerman faculty 801 Aug 28 14:18 warmup.html -bash-4.2$ nohup node server.js > output.log & [1] 164886 -bash-4.2$ nohup: ignoring input and redirecting stderr to stdout -bash-4.2$ ls -l total 20 -rw-r--r-- 1 dgerman faculty 22 Aug 28 14:08 monday.html drwxr-xr-x 26 dgerman faculty 4096 Aug 28 14:06 node_modules -rw-r--r-- 1 dgerman faculty 27 Aug 29 14:51 output.log -rw-r--r-- 1 dgerman faculty 192 Aug 28 14:06 server.js -rw-r--r-- 1 dgerman faculty 801 Aug 28 14:18 warmup.html -bash-4.2$ cat output.log Server running on 32775... -bash-4.2$ ps -ef | grep dgerman | grep server dgerman 164886 132271 0 14:51 pts/19 00:00:00 node server.js dgerman 165197 132271 0 14:51 pts/19 00:00:00 grep --color=auto server -bash-4.2$