How to get array values in Ruby On Rails

Question

I am working on Localization concept in Rails and need to get some of the localization values in HTML pages. So i generated array in controller like below format.,

#array use to store all localization values 
@alertMessages = []

#array values...
{:index=>"wakeUp", :value=>"Wake Up"}
{:index=>"tokenExpired", :value=>"Token Expired"}
{:index=>"timeZone", :value=>"Time Zone"}
{:index=>"updating", :value=>"Updating"}
{:index=>"loadMore", :value=>"Load More"} 
#....more

In HTML pages i want to get localization values like below or some other type,

<%= @alertMessages['wakeUp'] %>

so, it will display value is 'Wake Up',

But its not working.. Can any one please...

Roland Studer · Accepted Answer · 2018-05-01 12:49:08Z

4

It's easier to use a hash for this (http://api.rubyonrails.org/classes/Hash.html), which is like an array with named indexes (or keys).

So do this:

@alert_messages = {
   wake_up: "Wake Up",
   token_expired: "Token Expired",
   .
   .
   .
}

you can also extend your hash this way:

@alertMessages[:loadMore] = "Load More"

Access it by using:

@alert_messages[:loadMore]

Also you should check i18n to do Internationalization, which is a more robust and flexible way: http://guides.rubyonrails.org/i18n.html

edited May 1, 2018 at 12:49

answered Apr 25, 2013 at 9:38

Roland Studer

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2 Comments

suresh gopal Over a year ago

Able to access by using @alertMessages['loadMore']..., without specifying quotes unable to access value

Roland Studer Over a year ago

oh thanks for pointing out the error, i think you can either use "strings" or :symbols.

trompa · Accepted Answer · 2013-04-25 09:43:29Z

2

# Hash to store values
@alertMessages = {}

#hashvalues...
alertMessages[:wakeUp] = "Wake Up"
alertMessages[:tokenExpired] = "Token Expired"
alertMessages[:timeZone] = "Time Zone"
alertMessages[:updating] = "Updating"
alertMessages[:loadMore] = "Load More"

#....more
In HTML pages i want to get localization values like below or some other type,

<%= @alertMessages[:wakeUp] %>
so, it will display value is 'Wake Up',

And try to use always symbols because lookup will be fast

answered Apr 25, 2013 at 9:43

trompa

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3 Comments

trompa Over a year ago

and you can convert from symbol to string with to_s and the reverse with to_symbol.

suresh gopal Over a year ago

while trying your method i am getting this error NoMethodError (undefined method `<<' for {}:Hash):

trompa Over a year ago

where? cause it works in my computer ... Maybe its in other part of your code that is still using alertMessages as an array?

apneadiving · Accepted Answer · 2013-04-25 09:36:20Z

1

An array doesn't seem really appropriate here but if you still want to use it, proceed ths way:

array.find{|el| el[:index] == "wakeUp"}[:value]

You should abstract this though.

answered Apr 25, 2013 at 9:36

apneadiving

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Comments

rony36 · Accepted Answer · 2013-05-06 09:35:08Z

0

try this:

<% 
    @alertMessages.each_with_index do |alertMessage, index|
    alertMessage[:value] if index == "wakeUp"
    end 
%>

Thanks.

edited May 6, 2013 at 9:35

answered Apr 25, 2013 at 9:40

rony36

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2 Comments

suresh gopal Over a year ago

Why we need to run full length of array...?

rony36 Over a year ago

yes you are right. then @apneadiving's answer is the best one: array.find{|el| el[:index] == "wakeUp"}[:value]

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