Re^3: Corrupt Data?

The first argument of map is code executed for every other argument of map.

print map uc($_),    qw( a b c d );  # Prints ABCD
print map { uc($_) } qw( a b c d );  # Same thing
[download]

unpack '(A4)*', $val splits the value into as many 4 byte blocks as possible. I would have used "W" instead of "A", though. unpack '(W4)*', $val splits the value into as many 4 character blocks as possible.

@_ is not unamed —its name is @_— and nothing is being stored in it —its contents are being passed to map.

@_ holds the arguments of the current function (convert).

Comment on Re^3: Corrupt Data? Select or Download Code

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Re^4: Corrupt Data? by almut (Canon) on Jul 14, 2008 at 23:27 UTC
I would have used "W" instead of "A" The reason I used "A" is because it works in older Perls, too, like 5.8.8. "W" is available in 5.10 only.	[reply]
Re^5: Corrupt Data? by ikegami (Patriarch) on Jul 14, 2008 at 23:30 UTC
Then I wouldn't have used `unpack`. `/(.{1,4})/sg` would do the trick too.	[reply] [d/l] [select]
Re^5: Corrupt Data? by massa (Hermit) on Jul 15, 2008 at 11:22 UTC
The point is moot (between "A" and "W") because splickles stated that the input consists of hexadecimal MAC addresses, that would be matched by either one of them. []s, HTH, Massa	[reply]
Re^4: Corrupt Data? by BrowserUk (Patriarch) on Jul 15, 2008 at 02:02 UTC
Could you point me at the documentation for the 'W' template char, cos I'm darned if I can find it? 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. "Too many [] have been sedated by an oppressive environment of political correctness and risk aversion."	[reply]
Re^5: Corrupt Data? by almut (Canon) on Jul 15, 2008 at 02:15 UTC
pack (from v5.10.0): `W An unsigned char value (can be greater than 255).` [download]	[reply] [d/l]
Re^6: Corrupt Data? by BrowserUk (Patriarch) on Jul 15, 2008 at 09:26 UTC
Ah yes, Thanks. From the proposed use above, '(W4)' as an alternative for '(A4)', I was expecting it to be grouped with a,A & Z, or with U, and just looked right past it. 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. "Too many [] have been sedated by an oppressive environment of political correctness and risk aversion."	[reply]


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