Does Perl 6 have an equivalent to Python's update method on dictionary?

user_5829526 0
Viewed 381

In Python, if I update the dict dictionary with another dict called u(use Perl as key), it will update the value:

>>> dict = {'Python':'2', 'Perl' : 5}
>>> u = {'Perl' : 6}
>>> dict.update(u)
>>> dict
{'Python': '2', 'Perl': 6}

but in Perl 6 :

> my %hash = 'Python' => 2, Perl => 5;
> my %u = Perl => 6
> %hash.append(%u)
{Perl => [5 6], Python => 2}

So, Does Perl 6 have an equivalent to Python's update method on dictionary?

raku
3 Answers

You can use the , operator to do the update:

my %u = Perl => 6;
my %hash = 'Python' => 2, Perl => 5;
%hash = %hash, %u;
say %hash;   # => {Perl => 6, Python => 2}

And of course you can shorten the updating line to

%hash ,= %u;
user_8040050

In Perl 6, one option is to use a hash slice:

my %u = (Perl => 6);
%hash{%u.keys} = %u.values;

Result:

{Perl => 6, Python => 2}
user_21737730
Related