Perl Guru Forums: Fun With Perl: Perl Golf: hex dump

CGI/Perl Guide | Learning Center | Forums | Advertise | Login

Site Search: in


	MAIN INDEX	SEARCH POSTS	WHO'S ONLINE	LOG IN

Home: Fun With Perl: Perl Golf:
hex dump

freddo
User

Mar 23, 2002, 3:12 AM

Post #1 of 3 (31221 views)

hex dump	Can't Post

Hello everybody,

I was making my new T-Shirt, and came out with this stupid one:

Can you read this?
And are you The Geek Girl i seek for?
Please, tell me now...

46 72 65 64 64 6F

and i wanted to have this text printed as an hexdump on it.

my first shot was:

Code

perl -ne'printf("%02X ",ord$_)for(split//);' filename

which outputs:

43 61 6E 20 79 6F 75 20 72 65 61 64 20 74 68 69 73 3F 0A 41 6E 64 20 61 72 65 20 79 6F 75 20 54 68 65 20 47 65 65 6B 20 47 69 72 6C 20 69 20 73 65 65 6B 20 66 6F 72 3F 0A 50 6C 65 61 73 65 2C 20 74 65 6C 6C 20 6D 65 20 6E 6F 77 2E 2E 2E 0A 0A 34 36 20 37 32 20 36 35 20 36 34 20 36 34 20 36 46

Can you come with a shortest way to do it (we dont care about 0D 0A or other \n)?

And what about doing the reverse?
;---

freddo
User

Mar 23, 2002, 4:40 AM

Post #2 of 3 (31219 views)

Re: [freddo] hex dump [In reply to]	Can't Post

Damn, i just figured that:

Code

perl -ne'printf("%02X ",ord)for(split//);' filename

can do it too, and btw, the perldoc perlrun gives nice tricks about -F....
;---

mhx
Enthusiast / Moderator

Mar 23, 2002, 7:49 AM

Post #3 of 3 (31216 views)

Re: [freddo] hex dump [In reply to]	Can't Post

In Reply To

Code

perl -ne'printf("%02X ",ord)for(split//);' filename

First of all, you can get rid of another three characters by stripping all those needless parentheses and the semicolon:

Code

perl -ne'printf"%02X ",ord,for+split//' filename

Using -F won't help much, it's score is equal:

Code

perl -naF'' -e'printf"%02X ",ord,for@F' filename

But using a simple regex will save some three characters again:

Code

perl -ne'printf"%02X ",ord,for/./sg' filename

-- mhx

At last with an effort he spoke, and wondered to hear his own words, as if some other will was using his small voice. "I will take the Ring," he said, "though I do not know the way."

-- Frodo

Search for (options)

Web Applications & Managed Hosting Powered by Gossamer Threads
Visit our Mailing List Archives