Jun 15
A bunch of lazy programmers that I know looked at some code that had a lot of:
@foo = [] @bar = [] @baz = []
Instead they wanted to do:
create_many_arrays :foo, :bar, :baz
NOTE: watching someone do “foo = bar = baz = []” is fun :)
So:
def create_many_arrays(*arraynames)
params = arraynames.join ','
arrays = ''
attrs = ''
arraynames.each do |name|
thename = name.to_s
arrays += "@#{thename} = []\n"
attrs += "attr_accessor :#{name}\n"
end
code = <<-END_OF_CODE
alias :__dion__initialize :initialize
#{attrs}
def initialize
__dion__initialize
#{arrays}
end
def initialize(*incoming)
__dion__initialize *incoming
#{arrays}
end
END_OF_CODE
class_eval code
end
class Foo
create_many_arrays :foo, :bar
end
f = Foo.new
f.foo
f.foo << 1
f.foo
class Bar
attr_accessor :a
def initialize(a)
@a = a
end
create_many_arrays :foo, :bar
end
After a broken impl like this, you then realise that there is no real reason to want to do this, and your own code is broken if you want data structures like this.
June 16th, 2006 at 12:39 pm
looks to me like there is a real class trying to get out of all those arrays…