jdliss

Introduction to Sinatra

1. What is the purpose of the server file (routing)?

• The server file contains the routing information for what to do and what to display when different requests are recieved.

2. How do you pass variables into the views?

• Throw your stuff into an instance variable, or pass it in using hash syntax, "new var name (for use in view)" => "what you want to pass to the view"

3. How can we interpolate ruby into a view (html)?

jdliss

Models, Databases, Relationships in Rails

What is the difference between a primary key and a foreign key?

• a primary key is the id of the current table, a foreign key is the id of a different table

Where would we find a primary key?

• in the id field of the table

jdliss

Having fun or crying with C/C++

compiled vs dynamic languages

• how the ruby interpreter works
• how compiling works

memory allocation and data types

• arrays/vectors
• c-strings vs strings

jdliss

git stash

• Use when you want to store your local changes, but revert back to the current state of the HEAD commit

git stash apply

• use this when you want to reapply the most recent stash you made. git stash apply stash@{2} will apply the second most recent, etc.

git shortlog

jdliss

Q: What is C/C++ used for? A: Everything

• https://www.quora.com/What-can-someone-do-using-C++/answer/Adam-Helps?srid=udiza

Ruby vs C/C++

Ruby is interpreted, whereas C++ is compiled.

An interpreted language works like this:

• The high level language code is processed and translated into a low level language then gets executed.
• It does this on the fly, as the code is run, one line at a time.