Perl – 确定数组是否是另一个数组的子集
发布时间:2020-12-16 06:23:10 所属栏目:大数据 来源:网络整理
导读:参见英文答案 Difference of Two Arrays Using Perl????????????????????????????????????10个 我有以下代码.如果没有附加的CPAN模块,可以简单地编写子集吗? my @possibleNames = ("adam","chelsea");my @actualNames = ("adam","chucky","chelsea");sub is
参见英文答案 >
Difference of Two Arrays Using Perl????????????????????????????????????10个
我有以下代码.如果没有附加的CPAN模块,可以简单地编写子集吗? my @possibleNames = ("adam","chelsea"); my @actualNames = ("adam","chucky","chelsea"); sub isSubset { my ($littleSet,$bigSet) = @_; foreach (@{$littleSet}) { return 0 unless ($_ ~~ @{$bigSet}); } return 1; } printf("%sn",(isSubset(@possibleNames,@actualNames) ? "yes" : "no")); 解决方法
一种相当有效的方法是:
sub isSubset { my ($littleSet,$bigSet) = @_; my %hash; undef @hash{@$littleSet}; # add a hash key for each element of @$littleSet delete @hash{@$bigSet}; # remove all keys for elements of @$bigSet return !%hash; # return false if any keys are left in the hash } (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |