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I currently have a separate .rb file that contains smth like this:
if lang == 'fr'
#a = 'AAAAAAA'
#b = 'BBBBBBB'
#c = 'CCCCCCC'
else
#a = 'sadadddsad'
#b = 'dsafdsfdasfdsa'
#c = 'dsadasfdsfsfd'
end
, only with a lot more strings.
Being a large library of strings, and wanting to keep this in one place as these will be used in multiple controllers and functions within, what is a good method to call these files from inside a function in controllers?
Looks like you want to use Internationalization in your app. You could follow this link http://guides.rubyonrails.org/i18n.html to know more and its implementation.
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Have the function Cus_free_makers_eg1heChallenge(str) take the name parameter being passed to return "Hello Cristina!" if the name parameter is equal to "Cristina", return "Hello Kay!" if the name parameter is equal to "Kay" or "Hello there!" if the name parameter is equal to any other.
def Cus_free_makers_eg1heChallenge(str)
return str
end # keep this function call here
puts Cus_free_makers_eg1heChallenge(STDIN.gets)
Welcome to Stack Overflow! This is a bit off-topic, but first off, you should probably keep the method name shorter and simpler - probably not more than one or two words. Otherwise, when you call the method, it's a mouthful to type. The name should also describe what the method does, so the code is more readable.
Here is how I would write the method:
def hello(name)
if name == "Cristina" or name == "Kay"
return "Hello #{name}!"
end
"Hello there!"
end
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I want to check if param key exists with a variable name and if it exists I want to use value something like params[filenamestring[-1]].
filenamestring is any array generate with split
generally we use params like params[:key] but here i have array and want to use params value with array last element like params[filenamestring[-1]]
You are looking for this:
if params.key?(filenamestring[-1])
This will check if the key exists within the params.
Edit: Something like this would add the param to an array:
my_array << params[filenamestring[-1]] if params.key?(filenamestring[-1])
Or to add it to a string or integer:
my_variable + params[filenamestring[-1]] if params.key?(filenamestring[-1])
If you are doing something else, let me know and I'll update my answer again.
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If I have a form input where someone puts 'facebook.com' or 'google.com' it turns it into a valid URL adding http:// so that rails can use it. What I want is to have a form where you input a URL and it grabs the 3 most used words at that site and shows them in a list on the results page. This list should be accessible later, so I also need to store those words with that URL
def smart_add_url_protocol
url = Url.find_by(params[:url])
unless self.url[/\Ahttp:\/\//] || self.url[/\Ahttps:\/\//]
self.url = "http://#{self.url}"
end
end
something like this.
You can use URI::HTTP#build like so:
URI::HTTP.build(host: 'facebook.com').to_s
#=> "http://facebook.com"
I recommend the Addressable gem which is somewhat smart about guessing URLs from strings:
require "addressable/uri"
Addressable::URI.heuristic_parse(some_string_with_an_url).to_s
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Is there a more readable way in Ruby (or using Rails model helpers) to write the following:
def get_question
if self.is_question?
self.trackable
elsif self.is_answer?
self.trackable.question
elsif self.is_comment?
if self.trackable.is_question?
self.trackable.commentable
elsif self.trackable.is_answer?
self.trackable.commentable.question
end
end
end
There must be a more "Ruby way" of writing this so it's easier to read for other developers.
I tend to write that sort of thing like this:
def get_question
return self.trackable if self.is_question?
return self.trackable.question if self.is_answer?
return nil if !self.is_comment?
return self.trackable.commentable if self.trackable.is_question?
return self.trackable.commentable.question if self.trackable.is_answer?
return nil
end
that's pretty mu-idiomatic but I don't know if it qualifies as Ruby-idiomatic. Yes, there's an unnecessary return at the end but I like the symmetry and how it makes everything visually line up.
In real life, I'd probably want replace all that logic with a question method on the self.trackable. Then each thing could implement question (or to_question, get_question, or whatever name made the most sense in the broader context):
# Inside questions...
def question
self
end
# Inside answers...
# Nothing special needed, we've already got one.
and so on for the other possible possible self.trackable things. That would leave your get_question looking like this:
def get_question
self.trackable.respond_to?(:question) ? self.trackable.question : nil
end
or you could do away with get_question completely if you knew that self.trackable would also respond to question.
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My user has the attribute:
:step1_local
:step2_local
:step3_local
...
...
:local1
:local2
:local3
I would like to change an attribute value based on another set of attributes on the same model. I would like to do some processing mapping on user, say:
def magic (user)
user.local(1..3) = process(user.step(1..3)_local)
end
The code above of course does not work (example). I am not sure how to do it dynamically without going through each attributes individually. I want to map processing one to another. Any ideas?
You can use Object#public_send and method, like this:
def magic(user)
(1..3).each do |n|
user.public_send("local#{n}=", process(user.read_attribute("step#{n}_local")))
end
end