Thanks. It works! But I want to understand why it works.
Can you explain what is happening in this line?
*{'update_' . $n }->();
I thought glob is only used for directories. | [reply]
[d/l] |
See Globject sigils.
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
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Remember that perl allows you to have the same name for different things: $foo, @foo, %foo, and foo() (the subroutine 'foo') are all stored in different slots of the symbol table entry for the key 'foo': $foo is in SCALAR, @foo in ARRAY, %foo in HASH, and foo() in the CODE slot. We reference all of these things at once via a "glob".
The string inside the curlies is the key we'll use to access the symbol table.
The *{...} (the glob reference syntax) is essentially saying "find the symbol table entry that contains references to all the things with this name".
The ->() following the dereference says "call what the CODE slot references in this entry." It the sub had arguments, you could put them in the parens.
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