如何取消引用已传递给子例程的Perl哈希引用？ [英] How do I dereference a Perl hash reference that's been passed to a subroutine?

问题描述

我仍然试图理清我的散列解引用。我目前的问题是我现在将一个hashref传递给一个sub，并且我想在该sub中解引用它。但是我没有找到正确的方法/语法来做到这一点。在sub中，我想迭代散列键，但hashref的语法与散列不同，我知道该怎么做。

I'm still trying to sort out my hash dereferencing. My current problem is I am now passing a hashref to a sub, and I want to dereference it within that sub. But I'm not finding the correct method/syntax to do it. Within the sub, I want to iterate the hash keys, but the syntax for a hashref is not the same as a hash, which I know how to do.

我想这样做：

sub foo {
    %parms = @_;
    foreach $keys (key %parms) { # do something };
}

但传入的是散列，而不是散列。

but with a hashref being passed in instead of a hash.

欢迎任何指针（不是双关）。

Any pointers (pun not intended) are welcome.

谢谢。

推荐答案

目前我没有真正测试代码，但写意你会想要做这样的事情：

I havn't actually tested the code at this time, but writing freehand you'll want to do something like this:

sub foo {
    $parms = shift;
    foreach my $key (keys %$parms) { # do something };
}

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