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Where can I find an explanation of what the => operator means in Ruby?
For example,
class Acct < ActiveRecord::Base validates_confirmation_of :password, :email_address, :on => :create end what is the => operator doing in this case?
The symbol ‘=>’ is not an operator. It’s just a syntactic means to express that there is a relationship of ‘key-value’ between the other two elements. It’s used to define hashes (or associative arrays, as they’re called in some other languages, eg. PHP). In this sense, because ‘=>’ it’s not an operator, it doesn’t do anything (so as symbols ‘[‘ and ‘]’ don’t do anything when used to define an array). If you are still confused, have a look into the Hash Ruby class and compare it to the Array class.