• bearophile (17/20) Jan 16 2013 In Mathematica and NumPy (and other systems used with REPL) if
• Nicolas Sicard (2/22) Jan 16 2013 writeln(iota(10_000).take(10)); ?
• bearophile (5/6) Jan 16 2013 You have missed the point. What if you have a [iota(10_000),
• Nicolas Sicard (3/7) Jan 16 2013 OK, but is there a simple and general way to tell how to skip
• Peter Alexander (7/9) Jan 16 2013 I say no. IO isn't always for human consumption (as it usually is
• bearophile (8/12) Jan 16 2013 Mathematica and NumPy on default shorten the output if it's too
• Nicolas Sicard (6/11) Jan 16 2013 A format specifier like this, then, adding width and/or

"bearophile" <bearophileHUGS lycos.com> writes:

In Mathematica and NumPy (and other systems used with REPL) if 
you print a very large array you receive a shortened output. In 
Mathematica:

http://reference.wolfram.com/mathematica/tutorial/ShortAndShallowOutput.html

Mathematica uses a representation like (but on default it shows 
more items. There is a way to print them all):

Range[100]

{0, 1, 2, <<94>>, 97, 98, 99}


While numpy visualization is a bit simpler:

 from numpy import array
 array([0] * 10)



array([0, 0, 0, 0, 0, 0, 0, 0, 0, 0])
 array([0] * 10000)



array([0, 0, 0, ..., 0, 0, 0])


Currently In D this shows all the items:

writeln(iota(10_000));

Do you desire some way to have a shortened printing if the 
generated text is going to be huge?

Bye,
bearophile

"Nicolas Sicard" <dransic gmail.com> writes:

On Wednesday, 16 January 2013 at 11:16:41 UTC, bearophile wrote:
 In Mathematica and NumPy (and other systems used with REPL) if 
 you print a very large array you receive a shortened output. In 
 Mathematica:

 http://reference.wolfram.com/mathematica/tutorial/ShortAndShallowOutput.html

 Mathematica uses a representation like (but on default it shows 
 more items. There is a way to print them all):

 Range[100]

 {0, 1, 2, <<94>>, 97, 98, 99}


 While numpy visualization is a bit simpler:

 from numpy import array
 array([0] * 10)



 array([0, 0, 0, 0, 0, 0, 0, 0, 0, 0])
 array([0] * 10000)



 array([0, 0, 0, ..., 0, 0, 0])


 Currently In D this shows all the items:

 writeln(iota(10_000));

 Do you desire some way to have a shortened printing if the 
 generated text is going to be huge?

 Bye,
 bearophile

writeln(iota(10_000).take(10)); ?

"bearophile" <bearophileHUGS lycos.com> writes:

Nicolas Sicard:

 writeln(iota(10_000).take(10)); ?

You have missed the point. What if you have a [iota(10_000), 
iota(10_000)]?

Bye,
bearophile

"Nicolas Sicard" <dransic gmail.com> writes:

On Wednesday, 16 January 2013 at 11:46:10 UTC, bearophile wrote:
 Nicolas Sicard:

 writeln(iota(10_000).take(10)); ?

 You have missed the point. What if you have a [iota(10_000), 
 iota(10_000)]?

OK, but is there a simple and general way to tell how to skip 
elements for ranges other than sorted numeric ones?

"Peter Alexander" <peter.alexander.au gmail.com> writes:

On Wednesday, 16 January 2013 at 11:16:41 UTC, bearophile wrote:
 Do you desire some way to have a shortened printing if the 
 generated text is going to be huge?

I say no. IO isn't always for human consumption (as it usually is 
in Mathematica). You could very well be printing out as a means 
of serialisation, and you certainly don't want your data to be 
trimmed in that case.

For a systems programming language, consistency is absolutely 
critical.

"bearophile" <bearophileHUGS lycos.com> writes:

Peter Alexander:

 I say no. IO isn't always for human consumption (as it usually 
 is in Mathematica). You could very well be printing out as a 
 means of serialisation, and you certainly don't want your data 
 to be trimmed in that case.

Mathematica and NumPy on default shorten the output if it's too 
much large, and show it all on request. What I forgot to say in 
my first post is that in D it's probably better to have those 
conditions swapped, this means printing all on default, and 
adding a way to produce a shorter output on request.

Bye,
bearophile

"Nicolas Sicard" <dransic gmail.com> writes:

On Wednesday, 16 January 2013 at 14:05:03 UTC, bearophile wrote:
 Mathematica and NumPy on default shorten the output if it's too 
 much large, and show it all on request. What I forgot to say in 
 my first post is that in D it's probably better to have those 
 conditions swapped, this means printing all on default, and 
 adding a way to produce a shorter output on request.

A format specifier like this, then, adding width and/or 
"precision" to "%(":

writefln("%10.3(%s, %)", iota(10_000));
// Prints: "0, 1, 2, ... 7, 8, 9".

could be useful.