在数组perl中推送数组

Question

编辑：

如何将@myarr推入$ menu（见下文）

my @myarr = (
                [ "itemone", "itemoneb", "itemonec" ],
                [ "itemtwo", "itemtwob", "itemtwoc" ],
                [ "itemthree", "itemthewwb", "itemthreec" ],
                [ "itemfour", "itemfourb", "itemfourc" ]
               );

$menu = [
         "List",
         ["itemone", \&ds2],
         ["itemtwo", \&ds2],
         ["itemthree", \&ds2],
         ["itemfour", \&ds2],
         [ "Do Something (second)", \&ds2 ]
     ];

Answer 1

这取决于你想要做什么。

您可以直接推送数组：

push (@$menu, @myarr);

#results in:

[
     "List",
     ["itemone", \&ds2],
     ["itemtwo", \&ds2],
     ["itemthree", \&ds2],
     ["itemfour", \&ds2],
     [ "Do Something (second)", \&ds2 ],
     [ "itemone", "itemoneb", "itemonec" ],
     [ "itemtwo", "itemtwob", "itemtwoc" ],
     [ "itemthree", "itemthewwb", "itemthreec" ],
     [ "itemfour", "itemfourb", "itemfourc" ]
];

导致myarr 元素被推送到menu，或者推送引用：

push (@$menu, \@myarr);

#results in:

[
     "List",
     ["itemone", \&ds2],
     ["itemtwo", \&ds2],
     ["itemthree", \&ds2],
     ["itemfour", \&ds2],
     [ "Do Something (second)", \&ds2 ],
     [
        [ "itemone", "itemoneb", "itemonec" ],
        [ "itemtwo", "itemtwob", "itemtwoc" ],
        [ "itemthree", "itemthewwb", "itemthreec" ],
        [ "itemfour", "itemfourb", "itemfourc" ],
     ],
];

实际上是推送数组（嵌套数组）。

Answer 2

你可以推它：

 use Data::Dumper;
 push (@$menu, @myarr);
 print Dumper($menu), "\n";