Here few useful view helper methods, which can reduce the number of inline ruby codes in your view file.
1. Cycle:
cycle(first_value, *values)
Creates a Cycle object whose to_s method cycles through elements of an array every time it is called. This can be used for example, to alternate classes for table rows.
Example:
# Alternate CSS classes for even and odd numbers…
@items = [1,2,3,4]
<table>
<% @items.each do |item| %>
<treven”, “odd”) -%>”>
<td>item</td>
</tr>
<% end %>
</table>
2. Current Cycle:
current_cycle(name = “default”)
Returns the current cycle string after a cycle has been started. Useful for complex table highlighing or any other design need which requires the current cycle string in more than one place.
Example:
# Alternate background colors
@items = [1,2,3,4]
<% @items.each do |item| %>
<div style=”background-color:<%= cycle(“red”,”white”,”blue”) %>”>
<span style=”background-color:<%= current_cycle %>”><%= item %></span>
</div>
<% end %>
3. Excerpt:
excerpt(text, phrase, *args)
Excerpts the given phrase that matches first instance of phrase.
Examples:
excerpt(‘This is an example’, ‘an’, :radius => 5)
# => …s is an exam…
excerpt(‘This is an example’, ‘is’, :radius => 5)
# => This is a…
excerpt(‘This is an example’, ‘is’)
# => This is an example
excerpt(‘This next thing is an example’, ‘ex’, :radius => 2)
# => …next…
excerpt(‘This is also an example’, ‘an’, :radius => 8, :omission => ‘<chop> ‘)
# => <chop> is also an example
4. Truncate:
truncate(text, *args)
Truncates a given text after a given :length if text is longer than :length (defaults to 30).
Examples:
truncate(“Once upon a time in a world far far away”)
# => Once upon a time in a world…
truncate(“Once upon a time in a world far far away”, :length => 14)
# => Once upon a…
truncate(“And they found that many people were sleeping better.”, :length => 25, “(clipped)”)
# => And they found t(clipped)
truncate(“And they found that many people were sleeping better.”, :omission => “… (continued)”, :length => 25)
# => And they f… (continued)
5. Pluralize:
pluralize(count, singular, plural = nil)
Attempts to pluralize the singular word unless count is 1. If plural is supplied, it will use that when count is > 1, otherwise it will use the Inflector to determine the plural form
Examples:
pluralize(1, ‘person’)
# => 1 person
pluralize(2, ‘person’)
# => 2 people
pluralize(3, ‘person’, ‘users’)
# => 3 users
pluralize(0, ‘person’)
# => 0 people
6.Word Wrap:
word_wrap(text, *args)
Wraps the text into lines no longer than line_width width. This method breaks on the first whitespace character that does not exceed line_width (which is 80 by default).
Examples:
word_wrap(‘Once upon a time’)
# => Once upon a time
word_wrap(‘Once upon a time, in a kingdom called Far Far Away, a king fell ill, and finding a successor to the throne turned out to be more trouble than anyone could have imagined…’)
# => Once upon a time, in a kingdom called Far Far Away, a king fell ill, and finding\n a successor to the throne turned out to be more trouble than anyone could have\n imagined…
word_wrap(‘Once upon a time’, :line_width => 8)
# => Once upon\na time
word_wrap(‘Once upon a time’, :line_width => 1)
# => Once\nupon\na\ntime
Reference link:
http://api.rubyonrails.org/classes/ActionView/Helpers/TextHelper.html
