Why they are different ? It’s because in the second example there is a newline symbol also counted \n. Check it: print “Your age:” age=gets print age “33\n” print age.chomp.length # without newline #> 2 print age.length # with newline #> 3 chomp Returns a new String with the given record separator removed from the … Read more
I was attempting to run this code in NetBeans, so this behavior may just be specific to that editor. There were two causes I have found for it shutting down, first is when there is an error in the code, the browser will shut down as soon as an exception is thrown. Second, the browser … Read more
If you intended the variable assignment to be Ruby code, then it is wrong. It should be person = “John”; building = “Big Tower” or person, building = “John”, “Big Tower” And for the question, yes, except that interpolation is a feature of Ruby, not Rails. Please be respectful to plain Ruby and its developers, … Read more
If the first month calculation is correct and subsequent months are wrong, are you saying that you want a compound interest formula? (i.e. in month 2 you calculate interest on principle + previous months’ interest) toal = deposit_amount * (rate_of_interest*30/365)**month_number 1 solved How to do recurring deposit calculations accurately [closed]
Try transaction[‘amount’] For example a = {“amount”=>”-50.01″, “currency”=>”CAD”} Then a[‘amount’] returns ‘-50.01’ 2 solved Negative string value in hash ruby [closed]
You can use CSV for parsing files with separators, e.g.: require ‘csv’ CSV.foreach(‘your_file.txt’, col_sep: “\t”, headers: true).map do |row| row.to_h end #=> [{“purchaser”=>”João”, “name”=>”St”, “item”=>”R$20”, “description”=>”off” …}, # {“purchaser”=>”Amy”, “name”=>”Rd”, “item”=>”awesome”, “description”=>”of”, ..}, …] It seems like this data is ready to process. A more common way is using comma-separated value for files like this, … Read more
arr[-1] gives you the last element of arr, arr[-2] the second-to-last element and so on. arr[2, 3] gives you from the element at index 2, three elements of arr arr[2..3] gives you from the element at index 2 to the element at index 3 2 solved Accessing ruby elements
The unary ~ operator has higher precedence than == or =~ so this: string ==~ /^ABC/ is just a confusing way of writing: string == (~/^ABC/) But what does Regexp#~ do? The fine manual says: ~ rxp → integer or nil Match—Matches rxp against the contents of $_. Equivalent to rxp =~ $_. and $_ … Read more
How about this: <% current_user.bar.caipirinha.to_i.times do |s| %> <%= s.caipirinha %> <% end %> You can use the to_i method to convert caipirinha to an integer, then call times on it. 1 solved how iterate over fixnum [closed]
Like many object-oriented languages, Ruby has separation between methods in the class context and those in the instance context: class Example def self.a_class_method “I’m a class method!” end def an_instance_method “I’m an instance method!” end end When calling them using their native context it works: Example.a_class_method Example.new.an_instance_method When calling them in the wrong context you … Read more
Below one is solution I believe. Sure there is more room to refactor it, you can start from here. a = [“red”, “orange”, “green”, “red”, “yellow”, “blue”, “green”] a.reject {|e| ![‘red’, ‘green’].include? e } .each_cons(2) .select{|e| e == [‘red’, ‘green’]} .size A more artistic version. def neither_red_nor_green e ![‘red’, ‘green’].include? e end def red_followed_by_green ary … Read more
Your zeros function is trying to do too much. It can’t calculate a factorial and at the same time count trailing zeroes in it. If you think about it, while you are calculating the factorial, number of trailing zeroes may (and will) change. You’re only interested in the final value. So first calculate that and … Read more
Call the method. If you get a NoMethodError: undefined method it actually isn’t defined. If it runs, then it is defined. It could be that it is defined in an external package the project uses, and not in the actual codebase. Also you can shorten it like this: def is_fdi? !!get_fed_state[/fdi/i] end solved Self Keyword … Read more
To access the array, you need to use array index. Instead of using @messages_test = options[‘Messages’][‘IBMessageID’].to_s you need to use, to access to first element the arrayoptions[‘Messages’] array, below code @messages_test = options[‘Messages’][0][‘IBMessageID’].to_s You can iterate the array, if you wish, by using options[‘Messages’] each do |item| puts item[“IBMessageID”] # for illustration end 1 solved … Read more
Why regular expression on numbers? You can select all numbers less than 1000 and greater than 99. my_array.select { |n| n<1000 && n>99 } 0 solved Get all three digit numbers from array and store in new array [closed]