[] Ruby String method

Question

When I read the Beast source code, I found a lot of code like this:

<%= 'Password'[:password_title] %> 

It looks like calling the [] method with a character as an input parameter to a string for me, but I did not find this type of parameter to the String [] method in the ruby ​​API. What does it mean? thanks in advance.

Answer 1

This method, added by the "Gibberish" Beast plugin, is used for internationalization. Remember that classes are open in Ruby, so you cannot always rely on a standard API in such cases!

Answer 2

In the beast’s source, check the mascot plugin, which changes the String class to accept characters in brackets.

The String class itself does nothing sensible by using the str[symbol] method.

Answer 3

 str[fixnum] => fixnum or nil str[fixnum, fixnum] => new_str or nil str[range] => new_str or nil str[regexp] => new_str or nil str[regexp, fixnum] => new_str or nil str[other_str] => new_str or nil 

Here is what I found. If the character here is String, I still don't understand the meaning of the code. Why not just use:

 <%= 'password' %> 

or even:

 password