Re^2: Dynamically Calling a Subroutine

Thanks. It works! But I want to understand why it works.

Can you explain what is happening in this line?

*{'update_' . $n }->();
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I thought glob is only used for directories.

Comment on Re^2: Dynamically Calling a Subroutine Download Code

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Re^3: Dynamically Calling a Subroutine by BrowserUk (Patriarch) on Jul 12, 2011 at 23:53 UTC
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.	[reply]
Re^3: Dynamically Calling a Subroutine by pemungkah (Priest) on Jul 17, 2011 at 01:47 UTC
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.	[reply]