Ruby on Rails Helpers: h, j, l and t

[JuanitoFatas]

There are four one-char Rails helpers that seasoned developers use all the time for their simplicity and expressiveness:

h, alias for html_escape

h is a helper for escaping HTML tag characters.

Reference: http://api.rubyonrails.org/classes/ERB/Util.html#method-c-html_escape

> h("is a > 0 & a < 10?")
=> is a &gt; 0 &amp; a &lt; 10?

j, alias for escape_javascript

j is a helper for escaping carriage returns, single and double quotes in JavaScript to prevent malicious JavaScript from being executed via user's input.

Reference: http://api.rubyonrails.org/classes/ActionView/Helpers/JavaScriptHelper.html#method-i-escape_javascript

$('#comment-<%= @comment.id %>').html('<%= j render 'form', comment: @comment %>');

l, alias for localize

l is a helper for localizing Date and Time objects to local formats.

Reference: http://api.rubyonrails.org/classes/AbstractController/Translation.html#method-i-localize

<%= l(Time.current) %>
# => "Wed, 22 Jul 2015 16:35:27 +0800"

t, alias for translate

t is a helper for looking up text translations.

Reference: http://api.rubyonrails.org/classes/AbstractController/Translation.html#method-i-translate

<%= t("site.title") %>
# => "My Awesome Store"

Thanks for reading!

@JuanitoFatas :pencil2: Jolly Good Code

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[hanmd82]

:+1: @JuanitoFatas

[cupnoodle]

Was searching for what l method means, thanks!