About structs
Recently I talked about a monkey patch called attr_initializer, allowing you to write code like this:
class FooBar
attr_initializer :foo, :bar
def to_s
"your #{foo} is #{bar}"
end
end
FooBar.new('foo', 'bar')
But there is a way of doing it without a monkey patch. Use the Struct.
FooBar = Struct.new(:foo, :bar) do
def to_s
"your #{foo} is #{bar}"
end
end
FooBar.new('foo', 'bar')
Pretty cool.
Update
As was pointed out in my comments by Radoslav Stankov (which you can’t see anymore, because I switched to Disqus), you can also do this:
class FooBar < Struct.new(:foo, :bar)
def to_s
"your #{foo} is #{bar}"
end
end
FooBar.new('foo', 'bar')
I use this one more often, actually.
One final note: the parameters here aren’t stored as instance variables, they can only be accessed through their accessor methods.
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http://vanbergen.org Willem van Bergen
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http://vanbergen.org Willem van Bergen
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http://rstankov.com Radoslav Stankov
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http://rstankov.com Radoslav Stankov
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http://iain.nl Iain Hecker
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http://iain.nl Iain Hecker
