arrays - 将数组插入数组 perl

Question

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如何将@myarr 插入 $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

这取决于您究竟想做什么。

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" ]
];

这导致 myarr元素被推送到 menu ，或推送引用:

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" ],
     ],
];

这实际上插入了数组(嵌套数组)。