Crowdly

Active Support

DRY Principal (Don’t Repeat

Yourself)

Scaffolding

What is Enterprise applications?

a highly customizable software

that’s developed specifically

for the needs of a particular

organization

some content
requests need a whole new web page to be retrieved from the server

the ability to access all information from a single HTML page

What difference between render and redirect_to

render doesn’t run any code in the

target action, redirect_to is a way to handle returning responses to an HTTP

request

redirect_to

doesn’t run any code in the target action, render is a way to handle

returning responses to an HTTP request

render

doesn’t

run any code in the target action, redirect_to is as a sort of goto command

This code add

member block

member route

photos route

preview route

What kind of filter are

before, after, around

after, belong, around

before, after, belong

What ways to validate data don`t exist

view validation

controller-level validations

database-level validations

client-side validations

model-level validations

What kind of http request doesn’t exist:

connect

options

trace

put

set

patch

Suppose

we have the next hierarchy of classes:

Which

concept of OOP implemented in line 14?

polymorphism.

inheritance.

encapsulation.

abstraction.

Polymorphism

is the concept of writing code that:

can

set access levels of named methods by listing them as arguments.

allows

multiple inheritance from several types and classes.

allows

you to have public getters and setters for instance variables.

can

work with objects of multiple types and classes at once.