How to display part of the text?

Question

ruby

I understand that the question is very stupid, but for some reason I did not find an answer to it .....(
I have a blog article. I want to preview only, say, 500 characters from the blog article itself. How can I do this?
Output like this: <%=item.body%>

Answer 1

look at the truncate helper

<%= truncate(item.body, length: 500) %>

Answer 2

Read about Array slice