in reply to
How to change these small oneliners into Perl6 code?
1:
print '218'.subst(rx/^18/, 3);
2: this is supposed to work with substrrw, but doesn't with current rakudo.
3: Sorry, I don't even understand what this code does in Perl 5. Modifying and using a variable in the same statement is very detrimal for readability.
4: labels and goto aren't implemented in Rakudo. You can use prompt, or for lines() { } (since lines() is a lazy list, it doesn't read all the lines upfront; this was broken in some earlier Rakudo versions, but should be fine in the 201212 and possibly the 201211 releases).
I can recommend hanging out in the #perl6 IRC channel, we try to be helpful and friendly (and we succeed most of the time :).
Re^2: How to change these small oneliners into Perl6 code? by ABCXYZ (Novice) on Dec 23, 2012 at 18:44 UTC 
First, thank you very much.
>1: print '218'.subst(rx/^18/, 3);
Great, this works for me.
It was a real effort for me to figure out how "s///r" works in Perl6... It turned out to have a completely different syntax, but I do miss the Perl5's version: it's so concise, and since it is like a mother language, it can't be obfuscated anyway. I hope Perl6 can still allow the Perl5's sed syntax, conforming to TMTOWTDI. :)
>2: this is supposed to work with substrrw, but doesn't with current rakudo.
I see.
>3: Sorry, I don't even understand what this code does in Perl 5. Modifying and using a variable in the same statement is very detrimal for readability.
I will explain these code in the next post.
>4: labels and goto aren't implemented in Rakudo. You can use prompt, or for lines() { } (since lines() is a lazy list, it doesn't read all the lines upfront; this was broken in some earlier Rakudo versions, but should be fine in the 201212 and possibly the 201211 releases).
I am using version 201211, and it is slurping. but I wonder is the parentheses with "lines()" mandatory? It doesn't seem like Perl's style though?
>I can recommend hanging out in the #perl6 IRC channel, we try to be helpful and friendly (and we succeed most of the time :).
I will try that.  [reply] [d/l] [select] 
Re^2: How to change these small oneliners into Perl6 code? by ABCXYZ (Novice) on Dec 23, 2012 at 19:18 UTC 
I was simply translating my Perl5 oneliners on ProjectEuler into Perl6's code.
These are all on its first problem:
If we list all the natural numbers below 10 that are multiples of 3 or
+ 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.
Find the sum of all the multiples of 3 or 5 below 1000.
(I generalized this to:
below 10**$n for code #1 and #2,
or below $N for code #3)
This is my fastest solution in Perl5: (not in the code #1..4 above)
perl5 e '$n=3;print 2,3x$n,1 .6x$n+2'
The following is the origin of code #1, which works beyond the limit of 64 bit int, since it uses string op:
$n=3;print 2,(3x$n.1 .6x$n.8)=~s/^18/3/r
This is the origin of code #2:
$n=3;$_=2 .3x$n.1 .6x$n;substr($_,1)+=2;print
So code #3 is a more general solution for $N which is typically not an integer exponentiation of 10:
map{$s+=int$_*($i=abs int 999/$_)*++$i/2}(3,5,15);print$s
They all give the same result: 233168 for $n=3, but work for other $n as well.  [reply] [d/l] [select] 

https://github.com/perl6/perl6examples/tree/master/euler should interest you.
Five solutions have been added to this repo over the last 4 years. The latest one was added 18 days ago:
say [+] grep * %% (35), ^1000;
This means "say the sum of numbers that are divisible by 3 or 5 in the range zero up to (but not including) 1000".
 [reply] [d/l] 

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