Hash/array reference question

[Bryan]

If I have a hash reference, and want to assign a reference to a snapshot
of a changing array, what is the correct syntax?

$hash_ref->{'key'} = @array;
Obviously doesn't work

$hash_ref->{'key'} = \@array;
Doesn't work since my array is changed then reused for different keys,
the values get hosed.

my @tmp_array = @array;
$hash_ref->{'key'} = \@tmp_array;
Works as I want, but now I have an extra line of code.

Is that really necessary? Seems a bit clumsy to have to make a local
copy explicitly like that...

Thanks,
B

 

[Paul Lalli]

If I have a hash reference, and want to assign a reference to a snapshot
of a changing array, what is the correct syntax?

$hash_ref->{'key'} = @array;
Obviously doesn't work

$hash_ref->{'key'} = \@array;
Doesn't work since my array is changed then reused for different keys,
the values get hosed.

my @tmp_array = @array;
$hash_ref->{'key'} = \@tmp_array;
Works as I want, but now I have an extra line of code.

Is that really necessary? Seems a bit clumsy to have to make a
local copy explicitly like that...

Create a reference to a new anonymous array, and populate that array
with the current values of @array:

$hash_ref->{key} = [ @array ];

Paul Lalli

 

[Bryan]

If I have a hash reference, and want to assign a reference to a snapshot
of a changing array, what is the correct syntax?

$hash_ref->{'key'} = @array;
Obviously doesn't work

$hash_ref->{'key'} = \@array;
Doesn't work since my array is changed then reused for different keys,
the values get hosed.

my @tmp_array = @array;
$hash_ref->{'key'} = \@tmp_array;
Works as I want, but now I have an extra line of code.

Is that really necessary? Seems a bit clumsy to have to make a
local copy explicitly like that...

Create a reference to a new anonymous array, and populate that array
with the current values of @array:

$hash_ref->{key} = [ @array ];

Paul Lalli

Ah, cool, thanks.

B