I have an array witch contains the id of living objects. I want to
delete objects from the array, if the objects contains an variable ==
"other_var".
I was thinking of something like the following thing:
FAKE_DATABASE.delete_if {|x| x.var_of_x == @body }
I thought this would bee logical, but it doesn't seem like Ruby give
me right here.
How can I do this?
Regards Henrik
(PS: Pleas don't kill me if I did something stupid here, I'm newbie on
Ruby :-)).
FAKE_DATABASE.delete_if {|x| x.var_of_x == @body }
[snip]
How can I do this?
how about ?
[1, 2, 3, 4, 5].delete_if {|i| i==3} #=> [1, 2, 4, 5]
On 12/4/05, Henrik Ormåsen <henrik.ormasen@sos-rasisme.no> wrote:
--
Simon Strandgaard
Do you mean that you are actually storing the object_id of a Ruby
object? Something like:
class Article
attr_accessor :body
end
a = Article.new
b = Article.new
c = Article.new
database = [a.object_id, b.object_id, c.object_id]
or is your database something like:
database = [a, b, c]
or are you talking about primary keys from a relational database?
Could you clarify?
On Dec 4, 2005, at 5:06 PM, Henrik Ormåsen wrote:
I have an array witch contains the id of living objects.
Argh.. realized that you wanted x.var_of_x to be deleted.
I don't understand what you want.. can you elaborate?
On 12/4/05, Simon Strandgaard <neoneye@gmail.com> wrote:
On 12/4/05, Henrik Ormåsen <henrik.ormasen@sos-rasisme.no> wrote:
> FAKE_DATABASE.delete_if {|x| x.var_of_x == @body }
[snip]
>
> How can I do this?how about ?
[1, 2, 3, 4, 5].delete_if {|i| i==3} #=> [1, 2, 4, 5]
--
Simon Strandgaard
Thanks for the fast replay's, I'm impressed :-).
Her is my DB thing:
class Item
attr_reader :body
FAKE_DATABASE = []
def initialize(body)
@body = body
end
def add
FAKE_DATABASE.unshift(self)
end
def self.find_recent
FAKE_DATABASE
end
def del
FAKE_DATABASE.delete_if {|x| x.body == @body }
end
end
- Henrik
Henrik Ormåsen wrote:
Thanks for the fast replay's, I'm impressed :-).
Her is my DB thing:
class Item
attr_reader :bodyFAKE_DATABASE =
def initialize(body)
@body = body
end
def add
FAKE_DATABASE.unshift(self)
end
def self.find_recent
FAKE_DATABASE
end
def del
FAKE_DATABASE.delete_if {|x| x.body == @body }
end
end- Henrik
Sounds maybe you are trying to do something like:
<irb(main):001:0> class Item
<irb(main):002:1> attr_reader :body
<irb(main):003:1> @@db =
<irb(main):004:1> def initialize( body ) @body=body end
<irb(main):005:1> def add() unshift.self end
<irb(main):006:1> def recent() @@db end
<irb(main):007:1> def del @@db.delete_if { |x| x.body==@body }
<irb(main):008:1> end
=> nil
<irb(main):009:0> a = Item.new "a"
=> #<Item:oxb7ca1120 @body="a">
<irb(main):010:0> b = Item.new "b"
=> #<Item:0xb7c9c314 @body="b">
<irb(main):011:0> a.add
=> [#<Item:0xb7ca1120 @body="a">]
<irb(main):012:0> b.add
=> [#<Item:0xb7c9c314 @body="b">, #<Item:0xb7ca1120 @body="a">]
<irb(main):013:0> a.recent
=> same thing as above
<irb(main):014:0> b.recent
=> same thing as above
<irb(main):015:0> a.add
=> [#<item:0xb7ca1120 @body="a", #<Item:0xb7c9c314 @body="b">,
#<Item:0xb7ca1120 @body="a">]
note there are 2 "a" objects in the same db, you probably don't want
this, so will have to change your add method accordingly
<irb(main):016:0> a.recent == b.recent
=> true
<irb(main):017:0> a.del
=> [#<item:0xb7ca9c314 @body="b">]
<irb(main):018:0> b.del
=>
<irb(main):019:0> a.recent == b.recent
=> true
At least that's the direction you look like you are headed.
hth,
Todd
Henrik Ormåsen wrote:
Thanks for the fast replay's, I'm impressed :-).
Her is my DB thing:
class Item
attr_reader :bodyFAKE_DATABASE =
def initialize(body)
@body = body
end
def add
FAKE_DATABASE.unshift(self)
end
def self.find_recent
FAKE_DATABASE
end
def del
FAKE_DATABASE.delete_if {|x| x.body == @body }
end
end- Henrik
What's your problem? Deletion works ok:
irb(main):020:0* a=Item.new "a"
=> #<Item:0x10192810 @body="a">
irb(main):021:0> a.add
=> [#<Item:0x10192810 @body="a">]
irb(main):022:0> Item.find_recent
=> [#<Item:0x10192810 @body="a">]
irb(main):023:0> a.del
=>
irb(main):024:0> Item.find_recent
=>
irb(main):025:0>
Kind regards
robert