Hi I have a beginner question
What does the => operator do?
here is the example code from the book
class Product < ActiveRecord::Base
has_many :orders, :through => :line_items
#…
Hi I have a beginner question
What does the => operator do?
here is the example code from the book
class Product < ActiveRecord::Base
has_many :orders, :through => :line_items
#…
Alle martedì 29 maggio 2007, Gian H. ha scritto:
Hi I have a beginner question
What does the => operator do?
here is the example code from the book
class Product < ActiveRecord::Base
has_many :orders, :through => :line_items
#…
=> is not an operator, its simply the syntax used to create hashes:
h = {:a => 1, :b=>2}
creates an hash with keys :a and :b, corresponding to values 1 and 2
respectively. When you need to pass an hash as the last argument of a
method,
ruby allows you to omit the braces, so your call to has many means:
has_many( :orders, {:through => :line_items} )
In other words, you’re passing two arguments to the method has_many: the
first
is the Symbol :orders; the second is a Hash with one key (:through) and
one
value (:line_items)
Stefano
Thanks so much
On Thu, May 31, 2007 at 02:57:19AM +0900, Gian H. wrote :
=> is not an operator, its simply the syntax used to create hashes:
h = {:a => 1, :b=>2}
Looking at the trunk, my understanding is that it will be replaced by :
in a next release? Correct?
Hi,
At Thu, 31 May 2007 17:24:42 +0900,
Pierre-Alexandre M. wrote in [ruby-talk:253715]:
h = {:a => 1, :b=>2}
Looking at the trunk, my understanding is that it will be replaced by :
in a next release? Correct?
It’s a syntax sugar but traditional syntax is still valid. The
above example is equivalent to:
h = {a: 1, b: 2}
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