Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl: the Markov chain saw
 
PerlMonks  

Re: [OT] Python to Perl.

by davido (Cardinal)
on Jun 15, 2018 at 15:06 UTC ( [id://1216716]=note: print w/replies, xml ) Need Help??


in reply to [OT] Python to Perl.

I'm sure you've done this:

>>> a = [0] * 10 >>> a [0, 0, 0, 0, 0, 0, 0, 0, 0, 0]

...and so are aware that, at least superficially, the construct is the same as @a = (0) x 10. So I imagine the question is more about whether below the surface they are similar.

There is this gotcha:

>>> a = [1,2] >>> b = [a] * 5 >>> a [[1, 2], [1, 2], [1, 2], [1, 2], [1, 2]] >>> a[0] = 2 >>> b [[2, 2], [2, 2], [2, 2], [2, 2], [2, 2]]

But that's really no different than this:

my @a = (1, 2); my @b = (\@a) x 5; $a[0] = 2; print Dumper \@b;

It seems from documentation and behavior that the two are as close to being literal translations as can be hoped for across different languages.


Dave

Replies are listed 'Best First'.
Re^2: [OT] Python to Perl.
by BrowserUk (Patriarch) on Jun 15, 2018 at 15:37 UTC
    I'm sure you've done this:

    Actually no. I don't currently have a working Python install.

    I did one time for the purpose trying things when converting python code, but then I installed something that brought its python installation with it, and it screwed my original install up. As I don't use the language, I've never bothered to try and sort it out.

    It seems from documentation and behavior that the two are as close to being literal translations as can be hoped for across different languages.

    Thanks. That pretty much what I got from the context, but as the overall conversion doesn't work quite right, I'm now looking piece by piece.


    With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
    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". The enemy of (IT) success is complexity.
    In the absence of evidence, opinion is indistinguishable from prejudice. Suck that fhit

Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Node Status?
node history
Node Type: note [id://1216716]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this?Last hourOther CB clients
Other Users?
Others learning in the Monastery: (5)
As of 2024-03-29 04:47 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found