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#! /usr/bin/env false
use v6.c;
use MONKEY;
augment class Hash
{
#| Merges a second hash into the hash the method is called on. Hash given as
#| the argument is not modified.
#| Traverses the full tree, replacing items in the original hash with the
#| hash given in the argument. Does not replace positional elements by default,
#| and instead appends the items from the supplied hash's array to the original
#| hash's array. The object type of positionals is not retained and instead
#| becomes an Array type.
#| Use :no-append-array to replace arrays and positionals instead, which will
#| also retain the original type and not convert to an Array
#|
method merge (%b; Bool:D :$no-append-array = False)
{
hashmerge self, %b, :$no-append-array;
}
sub hashmerge (%merge-into, %merge-source, Bool:D :$no-append-array)
{
for %merge-source.keys -> $key {
if %merge-into{$key}:exists {
if %merge-source{$key} ~~ Hash {
hashmerge %merge-into{$key}, %merge-source{$key}, :$no-append-array;
} elsif %merge-source{$key} ~~ Positional {
if $no-append-array {
%merge-into{$key} = %merge-source{$key};
} else {
my @a;
@a.push: $_ for %merge-into{$key}.list;
@a.push: $_ for %merge-source{$key}.list;
%merge-into{$key} = @a;
}
} else {
# Non-positionals, so strings or Bools or whatever
%merge-into{$key} = %merge-source{$key};
}
} else {
%merge-into{$key} = %merge-source{$key};
}
}
%merge-into;
}
}
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