Getting Data using JSON & AJAX in Ruby on Rails [closed] - ruby

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Closed 9 years ago.
How can I get data from database on entering/changing keywords (like on change command of textfield) usin JSON & AJAX in Ruby on Rails?
Please give me any tutorial or the code how to do this.

jQuery change()
jQuery AJAX
respond_to

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Opening a file in ruby [closed]

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.
Closed 9 years ago.
I tried opening a file in ruby with the following code but I got this unknown error message.
No such file or directory - -p
Code:
myfile=File.open("/home/cucumber/profiles/data.csv","r")
Please advice with the correct method to do.
Ensure whether file exists in the designated location or not, either you check it manually or use in code:
File.exists?("/home/cucumber/profiles/data.csv")

What would be regex for this [closed]

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.
Closed 11 years ago.
I have list of website, I want all website with url http://www.tutorspree.com/tutor/#{AnyNumber) where after 'tutor' there could be any number. How do I write Regex for this?
I would define it with:
Regexp.new("^http://www\.tutorspree\.com/tutor/\\d+$")
This avoids having to escape the forward slashes. It would be used on a list of URLs like this:
tutor_re = Regexp.new("^http://www\.tutorspree\.com/tutor/\\d+$")
list = [ "http://nomatch.com/", "http://www.tutorspree.com/tutor/1", "http://www.tutorspree.com/tutor/2" ]
matches = list.select { |url| tutor_re.match url }
Something like:
http:\/\/www\.tutorspree\.com\/tutor\/\#\d+
ought to work.

How to set form_validation error messages for 3 different languages in codeigniter? [closed]

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.
Closed 11 years ago.
I'm thinking about duplicating the system\english\form_validation_lang.php file or folder, but I don't know how could I work that out.
For new languages, you should just create a new form_validation_lang.php file inside each language folder, like:
application/language/portugues/form_validation_lang.php
application/language/espanol/form_validation_lang.php
application/language/french/form_validation_lang.php
Then, you just have to set the appropriate language and Codeigniter will fetch the translations according to the language set.
More information can be found in the Codeigniter User Guide

Authentication token with "+" [closed]

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.
Closed 11 years ago.
Does the authentication token generated in ruby for login transaction may contain "+" char ?
Because I want to execute the performance test on web page written in ruby I have written script and so on.. but always when this token contains this char "+" login transaction fails
thanks in advance for answer.
Answer:
Ok I should have mark 'encode' for this authentication token and after that everything is work fine
In a query string, + is interpreted as a space. You should encode your token with CGI.escape or replace any + with %2B.

How can I make this show only if the percentage changed? [closed]

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.
Closed 11 years ago.
I'm stuck here:
puts "#{percent_finished.round}% uploading complete" ? if/unless ...
If percent_finished is part of an ActiveRecord model, you can actually just make a call to percent_finished_changed?.
For example:
puts "#{percent_finished.round}% uploading complete" if percent_finished_changed?
Here's some documentation:
http://ar.rubyonrails.org/classes/ActiveRecord/Dirty.html
Is this a command line tool?
last_percent = nil
upload_loop do
# ...
percent_rounded = percent_finished.round
puts "#{percent_rounded}% uploading complete" if percent_rounded != last_percent
last_percent = percent_rounded
end

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