What is the difference betw - Câu hỏi phỏng vấn Ruby on Rails

In Ruby on Rails, content_for and yield are both used to manage and insert content into layouts, but they serve different purposes and have distinct behaviors.

`yield`

Purpose: yield is used to insert content from a view into a layout. It acts as a placeholder where the content of the view will be rendered.
Usage: The simplest form of yield is to insert the entire content of a view into a layout. For example:
html Copy
```
<html>
  <head></head>
  <body>
    <%= yield %>
  </body>
</html>
```
This will render the entire content of the view into the body of the layout.
Named Yields: You can also have multiple named yield blocks in a layout to insert content into specific sections:
html Copy
```
<html>
  <head>
    <%= yield :head %>
  </head>
  <body>
    <%= yield %>
  </body>
</html>
```
Here, yield :head will insert content specifically designated for the :head section[1][4].

`content_for`

Purpose: content_for is used to capture content in a view and store it in a named block, which can then be rendered in a layout or another view.

Usage: You define a block of content in a view using content_for and give it a name:

erb Copy

<% content_for :head do %>
  <title>A simple page</title>
<% end %>
<p>Hello, Rails!</p>

This content can then be rendered in the layout using yield with the same name:

html Copy

<html>
  <head>
    <%= yield :head %>
  </head>
  <body>
    <%= yield %>
  </body>
</html>

The result will be:

html Copy

<html>
  <head>
    <title>A simple page</title>
  </head>
  <body>
    <p>Hello, Rails!</p>
  </body>
</html>

Flexibility: content_for can be used in helper modules and can store content for later use, which yield cannot do. This...

What is the difference betw...

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`yield`

`content_for`

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