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I need to replace a localized string to localized method.
From:
"social_1.localized()"
To:
"social_1".localized()
What is the best way to do?
May be this:
"social_1.localized()".gsub(".localized()","").localized()
or
my_string, my_method = "social_1.localized()".split('.')
my_method = my_method.gsub!("()",'').to_sym
my_string.send(my_method)
#uri-agassi (see comment) is right. using send this way may be a security risk. especially if it comes from user input (i.e. from the params object). you could think about to whitelist callable methods:
if [:upcase, :downcase, :capitalize].include?(my_method)
my_string.send(my_method)
end
Or at least ask the object, that it knowns the method to call:
my_string.send(my_method) if my_string.respond_to?(my_method)
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I'm curios as to what this specific method is called:
public Word(String word) {
this._word = word;
}
Thanks in advance!
This is called a constructor. In this case, it would be for a Word object. It takes parameters to assign values to instance variables (in this case, the String word.)
Here is a link to the Oracle documentation on providing constructors in Java for further reference.
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Are there any objects in ruby that don't respond to to_s?
The question isn't meant to ask whether it is possible to create one, which I know can be done by undef_method. Feel free to explain details, including caveats of undefining.
The BasicObject class does not define a to_s method, so any instance of that class would not have a to_s method.
We should never specialize a subclass, since the subclass would not attend to the parent expectation anymore, have a look in the Liskov Substitution Principle.
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It is possible to call define_method directly or from within a method call that accepts a block. But is it possible to create a new method or keyword that performs manipulation on code and then declares it into a method, but has the same syntax as the built-in def?
No. You can define a method, but you cannot define a keyword. Whatever method you define on the Module class, you cannot pass a method body to it without the do keyword, unlike with def.
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Is it possible to pass parameter to a method like this:
variable = my_method(:parameter)
No quotes, no nothing.Just -> :parameter .
Yes, you can pass a symbol to a method. Example:
puts('hello')
or
puts(:hello)
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Code:
#albums = #genres.each_with_index { |item,key|
if item.keys.include?('Albums')
break
end
}
This should be returning the Albums array (the #genres object is a huge multidimensional JSON response)
I reckon this is what I get for trying to code while being sick... or just simply doing things wrong... either way, any help is much appreciated!
I think you want #detect (or its synonym #find):
#albums = #genres.detect { |item| item.key?('Albums') }['Albums']
EDIT | Also note that you can provide an argument to break just like you can do with return, if you want to break and return a specific value.