Pros and cons of array lists
If you know the size of your array beforehand (fixed size), almost always go with a regular array, not an array list.
Different hats a programmer wears. Architect hat during the design phase, engineer hat during coding phase, etc.
The 4 Ds of software
Any problem (i.e. bug) that cascades from one step to another causes a factor of 10x in the cost to fix it…
Passing by value means u get a copy (e.g. with primitive types)
Passing by object reference means the mafia thing (min 9:15).
passing objects around is like talking to the mafia…
So if you’re gonna mess with the obj that’s being passed around, know that you’re changing the actual obj (not a copy).
Difference between passing by value and passing by object reference
What are they and how to deal with them (min 24:45).
Means go through the reference. Explanation involves little Mehran taking a chainsaw to the Mona Lisa (min 11:23). LOL
Mehran explains dereference
Create, read, erase files. Compares working with files to running with sharp scissors (min 15:00).
This assignment’s topics (memory management, properties, some Foundation classes) are covered in lectures 3 & 4. Paul demos this assignment at the end of lecture #4.
I’ve read up to ch5 so far… I’ll just keep reading from there and will come back to this assignment when I finish ch11.
Assignment 2 [PDF]
Topics: Stacks. Queues. Valgrind. Bitwise operators. Hash tables. Trees. Binary search trees. Tries.
typedef= synonyms for data types.
string= 1st byte of an array of characters.
NULL’s type is a pointer (it’s typedef’d). “Points to what? Idk but it’s not zero. It could point at anything.”
they are different data types
array- you must know the size in advance. If you go too far, you segfault.
Linked lists vs. arrays (min 22)
queue- a data structure (FIFO)
With what data type could you implement a queue? an array
A data structure has data associated with it and also typically some standard operations (e.g. sort, insert, delete)
hash tables
http://xkcd.com/138/
CS50 library, linked lists, scanf, pointers, stack, heap, buffers, structs
CS50 library, stack and heap continued, pointers continued, file I/O, forensics, linked lists, structs
Term: Fall 2010
David showed this video at the beginning of the class…hahaha it’s awesome…
Host a Windows 7 Launch Party
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[slidepress gallery='mvc-diagram']
UPDATE: November 17, 2010 6:10 PM
Done! Here’s the calculator I built…
