dellsystem

Lecture notes from the first lecture of [[MATH 236]], taught by Bulent Tosun. In this lecture, we took a short preliminary quiz, and went over some of the motivation behind linear algebra.

Link to syllabus (PDF)

[TOC]

Quiz

The quiz lasted approximately 17 minutes. There were 6 true/false questions on basic linear algebra material, which are summarised below:

dellsystem

import json

from tfx import errors, utils


class ConfParser:
    """
    Only checks for correctly-formatted conf files, with all the
    necessary keys present, etc. It will check that all the values (and the
    values of any nested dictionaries and lists) are the right type and

dellsystem

datatype 'a stream = Stream of (unit -> 'a * 'a stream);

val count = ref 0;

val FibStream =
    let
        fun fib a b = Stream (fn () => (a, fib b (a+b)))
    in
        fib 0 1
    end;

dellsystem

use "hw5-q2.sml";

(* ------------------------------------------------------------
   Place this file in the same directory as hw5-q2.sml, and run "sml tests.sml".
   You must have a function called "occurs" (typ option ref -> typ -> bool) and
   a function called unify (typ * typ -> unit).
   If you don't have a function called "occurs", or if it's a different type,
   set the flag testOccurs below to false.
   ------------------------------------------------------------*)

dellsystem

<?php

// Prints out the data for just the price graph

$max_price = 50;

$graph = array();

$initial_time = 1321711400;

dellsystem

import unittest

"""
Reversing a singly-linked list without using any sort of data structure
The highlight of my day
"""

class Item:
    def __init__(self, next=None):
        self.next = next

dellsystem

from heapq import heappush, heappop

# List-backed priority queue (using the heapq library)
queue = []
chars = {
    'a': 0.15,
    'b': 0.07,
    'c': 0.21,
    'd': 0.10,
    'e': 0.05,

dellsystem

import sys

"""
Skeleton for dijkstra.py. Based on code originally written by Andrea Sigler.

Brought to you by wikinotes.ca.
"""

# Based on the original HeapNode class, only modified slightly
class HeapNode:

dellsystem

<?php
/**
*
* @package Dynamo (Dynamic Avatar MOD for phpBB3)
* @version $Id: acp_dynamo.php [email protected]$
* @copyright (c) 2011 dellsystem (www.dellsystem.me)
* @license http://opensource.org/licenses/gpl-license.php GNU Public License 
*
*/

dellsystem

#!/usr/bin/env python

import glob
import sys
from PIL import Image

if len(sys.argv) < 3:
    print "Usage: ./check_sizes.py [directory] [desired zoom level]"
    exit(1)