[RUBY] How to number (number) with html.erb

On the HTML display side, for example

A code used when numbering so that the numerical value changes depending on the content. (It was at such times that it was used most often)

Use with_index (1)

By using this, the value at the start of numbering can be started from the value in parentheses. You don't have to write + 1.

<% ....map.with_index(1) do |a, i| %>

<p><%= i %></p>


In this case, it will start with 0, so you need to write + 1.

<% ....map.each_with_index do |a, i| %>

<p><%= i + 1 %></p>

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