I was practicing some interview questions where I found this. I had a look at perldoc -f tie but couldn't get it. I know about bless and is using in my programs.
Can anyone tell me what is tie and how it is related and different from bless, and its usage? I will appreciate any simple example.
PS: I am a perl developer and using it in day to day life. My concern is not for interview, but for knowing it
bless is used to construct an object.
tie allows code to provide a variable for interface. e.g. It might look like you are assigning to a variable, but you are really calling a sub. tie and other forms of magic are primarily used to provide "clever" interfaces (e.g. altering %ENV alters the environment, altering %SIG sets signal handlers, $! mirrors both errno and perror, etc). It can also be used to extend the usefulness of existing code (e.g. creating something that looks like a file handle allows one to reuse code that expects to get its input from a file handle).