Global array of hashes

Ruby
1

I’m doing this:

$globvar=Array.new()
$globvar[0]=“mygenericvalue”
localvar=$globvar
localvar[0]=“mylocalvalue”
puts $globvar

And the result for $globvar is “mylocalvalue”

How can I assign to localvar only the value of $globvar and not the
memory possition??

Thanks

2

On Thu, Apr 10, 2008 at 6:45 AM, Mario R. [email protected] wrote:

How can I assign to localvar only the value of $globvar and not the
memory possition??

Thanks

This seems to work…

localvar = $globvar.dup

Todd

3

But not in this case:

$globvar=Array.new()
myHash=Hash.new()
myHash[“oneValue”]=“mygenericvalue”
$globvar[0]=myHash

localvar=$globvar.dup

localvar[0][“oneValue”]=“mylocalvalue”

puts $globvar

4

On Thu, Apr 10, 2008 at 6:57 AM, Mario R. [email protected] wrote:

puts $globvar

In this case, you create a new array that holds the same Hash object.
You have to dup the Hash as well.

hth,
Todd

5

Hi –

On Thu, 10 Apr 2008, Mario R. wrote:

puts $globvar

Try this:

irb(main):001:0> a = []
=> []
irb(main):002:0> h = {}
=> {}
irb(main):003:0> h[“one”] = “generic”
=> “generic”
irb(main):004:0> a[0] = h
=> {“one”=>“generic”}
irb(main):005:0> l = Marshal.load(Marshal.dump(a))
=> [{“one”=>“generic”}]
irb(main):006:0> l[0][“one”] = “local”
=> “local”
irb(main):007:0> a
=> [{“one”=>“generic”}]

(using globals if you absolutely must… but that’s another story :slight_smile:

David

6

Ok.

I was thinking that maybe it could be an easier way…

Thank you.