joelburton

// noinspection JSUnusedGlobalSymbols,JSUnusedLocalSymbols

joelburton

### WAYS TO LOOP OVER TWO THINGS AT ONCE IN PYTHON:

cats = ["fluffy", "puffy", "muffy"]
dogs = ["fido", "rover", "bowser"]

# jinja-specific way, won't work in regular python:
#
# {% for cat in cats %}

joelburton

data class Cell(val y: Int, val x: Int) {
    fun neighbors() = listOf(Cell(y, x - 1), Cell(y - 1, x), Cell(y, x + 1), Cell(y + 1, x)) // WNES
}

data class Garden(val cells: List<List<Int>>) {
    val nRows = cells.size
    val nCols = cells[0].size

    fun findCenterCells() = listOf(
        Cell((nRows - 1) / 2, (nCols - 1) / 2), // NW

joelburton

/** Single abstract-method interface for a way to fly. */
fun interface FlyBehavior {
    fun fly()
}

// implementations of the single-method interface
val FlyWithWings = FlyBehavior { println("I'm flying!") }
val FlyNoWay = FlyBehavior { println("No way") }
val FlyRocketPowered = FlyBehavior { println("Rocket!!!!!!") }

joelburton

import java.io.File

/** Single instruction for state machine. */
data class Instruction(val opcode: String, val operand: Int)

/** Marker exception raised during state machine runs. */
class Answer(val result: Int) : Throwable()

val lines = File("8.txt")
    .readLines()

joelburton

class Course(val name: String, val start: Short, val end: Short)

/** For list of courses, print best schedule for a single classroom.
 *
 * The best schedule for a classroom is the one that has the most classes
 * scheduled for it, with no classes overlapping with another class.
 */

fun bestSchedule(classes: MutableList<Course>): List<String> {
    val schedule = mutableListOf<String>()

joelburton

import java.util.*

/** Graph node for undirected graphs.
 *
 * @property value the value of the node.
 * @property adjacent a set of the adjacent nodes for this one.
 **/

class Node(
    private val value: Any,

joelburton

Setting up Flask <-> SQLAlchemy Step-by-Step

1. Check app.py for postgresql:///sample_db <— the name of your new database is the thing after the 3 slashes. Use this in step 2.

2. In terminal (and maybe not necessarily in the dir of your file, just anywhere?), type: createdb sample_db

   NOTE: (Yes, it doesn't matter what directory you're in when you run createdb.

joelburton

Study Hall Topics

Resources / URLs / Endpoints

http://api.joelburton.com/recipes/brownies?color=red

URL: "resource" : "/recipes/brownies"

REST "resource" (subject)

joelburton

class POJO(dict):
    def __getattr__(self, attr):
        return self[attr]

    def __setattr__(self, attr, val):
        try:
            super().__getattr__(self, attr)
            super().__setattr__(self, attr, val)
        except AttributeError:
            self[attr] = val