In these days I have been playing with Java reflection and .class format. I'm currently studying ldc instruction. In JVM Specification I found term I don't understand: symbolic reference, and I h...

I've studied about JVM(especially JDK 8 version) and while studying about class linking, I've not figured out where a direct memory address that was determined from symbolic reference in resolution...

I need to achieve the following in perl printmsg(@val1, $msg1) if @val1; printmsg(@val2, $msg2) if @val2; printmsg(@val3, $msg3) if @val3; printmsg(@val4, $msg4) if @val4; printmsg(@val5, $msg5) i...

I'm rewriting a framework from Perl5 to Perl6 for my work purposes. At some place I need to collect information from other modules/classes by executing a public sub they might provide; or they may ...

I am looking for a Git command that will print the symbolic name for HEAD. I was using this command $ git name-rev --name-only HEAD master $ git checkout HEAD~2 $ git name-rev --name-only HEAD mas...

The following shell code correctly creates a chain of symbolic references git symbolic-ref "first" "refs/heads/master" git symbolic-ref "second" "first" git symbolic-ref "nested/third" "second" gi...

Why does the following snippet work at all? And what evil might be possible using this? But seriously, is there any reason, the code in ${} gets evaluated at all and then used as scalar reference? ...

If I have a variable, $bar, which is equal to string "foo" and $foo is equal to 0xdead, how can I get $foo's value while I only have the the string for the variable name? Essentially, I want to do...

In Perl, is it possible to create a global variable based on a string? E.g., if I had a function like: sub create_glob_var { my ($glob_var_str) = @_; # something like this ( but not a hash acce...