Comparing Arrays' Values

[Errin Larsen]

Hi guys (and gals!),

I want to compare a constant, known (expected values) array with the
results I'm collecting in another array.

Something like this, but I don't think this works the way I want it to:

my @rray1 = qw( One Two Three );
chomp( my @rray2 =  );

print "The 2 arrays are the same\n" if( @rray1 eq @rray2 );

So that if I enter:
  One
  Two
  Three
  
on the terminal when I run the code, It will print "The 2 arrays are
the same" on the next line.

However, my tests seem to indicate I don't really know what's happeneing when I:
  @rray1 eq @rray2

Can someone help me?

--Errin

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Re: Comparing Arrays' Values

[Wiggins d Anconia]

> Hi guys (and gals!),
> 
> I want to compare a constant, known (expected values) array with the
> results I'm collecting in another array.
> 
> Something like this, but I don't think this works the way I want it to:
> 
> my @rray1 = qw( One Two Three );
> chomp( my @rray2 =  );
> 
> print "The 2 arrays are the same\n" if( @rray1 eq @rray2 );
> 
> So that if I enter:
>   One
>   Two
>   Three
>   
> on the terminal when I run the code, It will print "The 2 arrays are
> the same" on the next line.
> 
> However, my tests seem to indicate I don't really know what's
happeneing when I:
>   @rray1 eq @rray2
> 
> Can someone help me?
> 
> --Errin

The above does not work because 'eq' is forcing the arrays into scalar
context, therefore you are testing whether the length of the arrays is
string (not numeric that would be C<==>) equal.  But how to do this can
be found in the FAQ,

perldoc -q 'test whether two arrays or hashes are equal'

perldoc perlfaq4, has some other juicy bits about analysing arrays and
other data stores.

http://danconia.org


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