w4d1 Flashcards
1
Q
What’s a good key for errors in a validation?
A
the name of the column
better yet:
:column_name_id
2
Q
What does instance_variable_get do?
and instance_variable_set
A
Gets/sets an instance variable without using a getter
3
Q
What does send do?
A
It takes in a symbol/string that corresponds to an instance variable and invokes that method
4
Q
How do you call define method from outside of the containing class?
A
SomeClass.send(:define_method, :method_name, &prc)
Where prc is the block you’d normally pass to define_method
5
Q
What do you always have to do if you overwrite method_missing?
A
call super if our conditions aren’t satisfied
6
Q
What 6 methods are key to metaprogramming?
A
#send #define_method #method_missing #instance_variable_get #instance_variable_set #methods
7
Q
How do you see routes?
A
rails routes
8
Q
What are the RESTful methods?
A
index create update show destroy
