On Wed, Feb 6, 2019 at 1:02 PM ToddAndMargo via perl6-users
<perl6-users@perl.org <mailto:perl6-users@perl.org>> wrote:
On 2/6/19 12:58 PM, Patrick R. Michaud wrote:
> On Wed, Feb 06, 2019 at 12:38:01PM -0800, ToddAndMargo via
perl6-users wrote:
>> $ p6 'my Str $x="abcd"; for $x.comb.kv -> $i, $j {say "Index
<$i> = <$j> =
>> ord <" ~ ord($j) ~ ">";}'
>>
>> Index <0> = <a> = ord <97>
>> Index <1> = <b> = ord <98>
>> Index <2> = <c> = ord <99>
>> Index <3> = <d> = ord <100>
>>
>> Certainly very practical. If dealing with large strings, is
>> it the most efficient?
>
> .comb is intended to be more efficient than .split for this
particular application, yes.
>
> "comb" is about obtaining the substrings you're looking for
(individual characters in this case); "split" is about finding
substrings between the things you're looking for.
>
> Pm
>
Thank you!
On 2/6/19 1:20 PM, yary wrote:
Leave off the '.kv' to get a Seq (array-like-thing)
my $letters='abc def g';
abc def g
$letters.comb().perl
("a", "b", "c", " ", "d", "e", "f", " ", "g").Seq
($letters.comb())[0,3,4,6]
(a d f)
my @letter_array = $letters.comb()
[a b c d e f g]
@letter_array[1]
b
-y
Hi Yary,
Thank you!
I do the
$x.comb.kv -> $i, $j {say "Index <$i> = <$j> = ord <" ~ ord($j) ~ ">";}'
thing a lot as I am constantly reading web pages and sometimes
the unprintable bizarre characters I get can astound. So
I am looking to see what the ascii values are of what I am
actually reading.
One trick I use is if there is weird stuff I can not see after
what I want is to use greedy and regex:
"abc" ~ weird ~ weird ~ weird ~~ s/ abc .* /abc/;
Which could also be written
"abc" ~ weird ~ weird ~ weird ~~ s/ (abc) .*/$0/;
Problem solved and I did not even have to figure out how
to drop a 0x01.
Regex's are kind of fun, well, once you get the hang of them.
-T
