The zip operator in this case takes two sequences and interleaves them
into a single sequence. It might be useful if you have handy or can
generate a list of keys and a list of values you want to put together
in pairs using => to create a hash table.
Your explicit approach makes sense for readability - it can aid
comprehension if a fake address looks like a real one.
On 1 March 2017 at 16:47, Todd Chester <toddandma...@zoho.com> wrote:
>> On Wednesday, March 01, 2017 01:01 PM, Todd Chester wrote:
>>>
>>> Hi All,
>>>
>>> And it even gets more interesting.
>>>
>>> It even works with Associative Arrays (Hashes), which I adore!
>>>
>>> Interesting how associative arrays don't print in order that they
>>> were entered into the array.
>>>
>>> <code>
>>> #!/usr/bin/perl6
>>>
>>> my @x = ( "a", "b", "c", "d" );
>>>
>>> print "loop of \@x\n";
>>> for @x.kv -> $index, $value {
>>> print " Line no. <" ~ ($index + 1) ~
>>> "> has an index of <$index> and a value of <$value>\n"; }
>>> print "\n";
>>>
>>>
>>> my %y = ( 'aa'=>"AA", 'bb'=> "BB", 'cc'=>"CC", 'dd'=>"DD" );
>>>
>>> print "loop of \%y\n";
>>> for %y.kv -> $key, $value {
>>> print " \%y has an key of <$key> and a value of <$value>\n"; }
>>> print "\n";
>>> </code>
>>>
>>> ./LoopIndexTest.pl6
>>> loop of @x
>>> Line no. <1> has an index of <0> and a value of <a>
>>> Line no. <2> has an index of <1> and a value of <b>
>>> Line no. <3> has an index of <2> and a value of <c>
>>> Line no. <4> has an index of <3> and a value of <d>
>>>
>>> loop of %y
>>> %y has an key of <cc> and a value of <CC>
>>> %y has an key of <dd> and a value of <DD>
>>> %y has an key of <bb> and a value of <BB>
>>> %y has an key of <aa> and a value of <AA>
>
>
>
> On 02/28/2017 09:27 PM, Richard Hainsworth wrote:
>> Instead of
>> my %y = ( 'aa'=>"AA", 'bb'=> "BB", 'cc'=>"CC", 'dd'=>"DD" );
>>
>> in the code below,
>>
>> I find the following useful for filling an associative array (when
>> testing and I dont care about the contents)
>>
>> my %y = <aa bb cc dd> Z=> 'AA'..*;
>> #{aa => AA, bb => AB, cc => AC, dd => AD}
>>
>> But if the contents matter, how about,
>> my %y = <aa bb cc dd> Z=> <AA BB CC DD>;
>> #{aa => AA, bb => BB, cc => CC, dd => DD}
>>
>> The 'Z' is the zip operator, the '=>' links a key to its value.
>> The ..* uses the power of perl6 to generate sequences from an initial
>> member.
>>
>> Richard
>>
>
> Hi Richard,
>
> I don't understand how the zipper works or
> why I'd want to use it.
>
> my %Location = ( 'City'=>"Carson City",
> 'State'=>"NV",
> 'ZipCode'=>"89701",
> 'Country'=>"USA" ); # just made up place
>
> Make sense to me and is easily maintainable.
> I do not get where the zipper comes in? Or
> how it would make things easier to read?
>
> By chance is the idea that you don't have to the assign the
> values at the same time you assign the keys?
>
> There is extra time spent on writing the way I did it, but
> I don't care. I know how to type (high school typing) and
> my main goal it to make the code maintainable. (This is why I
> use Top Down as well.) I can type almost as fast as I think.
>
> I am confused,
> -T
