在 Perl 中查找數組的大小 - Find size of an array in Perl

問題：

I seem to have come across several different ways to find the size of an array.我似乎遇到過幾種不同的方法來查找數組的大小。 What is the difference between these three methods?這三種方法有什麼區別？

my @arr = (2);
print scalar @arr; # First way to print array size

print $#arr; # Second way to print array size

my $arrSize = @arr;
print $arrSize; # Third way to print array size

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解決方案：

參考一： https://stackoom.com/question/V4qd
參考二： Find size of an array in Perl