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Type of argument to keys on reference must be unblessed hashref or arrayref

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问题 if((scalar keys ($this->{'libraries'}->{$y}->{'cellHash'})) == 0){ This is the line where I am getting the "Type of argument to keys on reference must be unblessed hashref or arrayref" error. Can you help me fix this? I am not posting the code for obvious reasons. 回答1: The new ability of keys to take a reference is broken by design. Perl's development team couldn't figure out how it should work with some references, so it only works for some references. As such, keys 's ability to accept a

Perl dbi (select) fetches empy strings in array

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问题 I have a perl script that connect to a postgres db and fetches a couple select statements that it runs on it. This output have the purpose to print in word afterword. While i was building my project i didn't notice something that happens with the fetching part ,it was after i print it in word that i noticed something strange. I execute a select statement and fetches this in an arrayref , but when i print this arrayreferentie I don't got only values in my array but also empty strings and de

Type of argument to keys on reference must be unblessed hashref or arrayref

阅读更多关于 Type of argument to keys on reference must be unblessed hashref or arrayref

if((scalar keys ($this->{'libraries'}->{$y}->{'cellHash'})) == 0){ This is the line where I am getting the "Type of argument to keys on reference must be unblessed hashref or arrayref" error. Can you help me fix this? I am not posting the code for obvious reasons. The new ability of keys to take a reference is broken by design. Perl's development team couldn't figure out how it should work with some references, so it only works for some references. As such, keys 's ability to accept a reference is documented to be experimental . Unable to resolve this issue, this "feature" was removed 5.24.