|
Posted by Nithy on November 12, 2007, 9:13 am
Please log in for more thread options
>>
>> [snip]
>>
>> > if I print "$1\n",
>> > the file prints just fine. But, if I do something like print "$1 after
>> > \n", the whole output is messed up. If I print "before $1\n", nothing
>> > prints at all. If I print "before $1 after\n", only after prints.
>>
>> not really sure, but could be a rogue "\r" in $1,
> There
> is a rogue carriage return (0xd) in the string
> Is there something I can do to deal with this
> situation?
Repair the corrupted file:
perl -p -i -e 'tr/\r//d' bad_file
--
Tad McClellan SGML consulting
tadmc@augustmail.com Perl programming
Fort Worth, Texas
|
|
Posted by smallpond on November 12, 2007, 9:58 am
Please log in for more thread options
>>
>> [snip]
>>
>> > if I print "$1\n",
>> > the file prints just fine. But, if I do something like print "$1 after
>> > \n", the whole output is messed up. If I print "before $1\n", nothing
>> > prints at all. If I print "before $1 after\n", only after prints.
>>
>> not really sure, but could be a rogue "\r" in $1,
> There
> is a rogue carriage return (0xd) in the string
> Is there something I can do to deal with this
> situation?
Repair the corrupted file:
perl -p -i -e 'tr/\r//d' bad_file
--
Tad McClellan SGML consulting
tadmc@augustmail.com Perl programming
Fort Worth, Texas
|
|
Posted by Nithy on November 13, 2007, 12:20 am
Please log in for more thread options >>
>> [snip]
>>
>> > if I print "$1\n",
>> > the file prints just fine. But, if I do something like print "$1 after
>> > \n", the whole output is messed up. If I print "before $1\n", nothing
>> > prints at all. If I print "before $1 after\n", only after prints.
>>
>> not really sure, but could be a rogue "\r" in $1,
> There
> is a rogue carriage return (0xd) in the string
> Is there something I can do to deal with this
> situation?
Repair the corrupted file:
perl -p -i -e 'tr/\r//d' bad_file
--
Tad McClellan SGML consulting
tadmc@augustmail.com Perl programming
Fort Worth, Texas
|
|
Posted by Jürgen Exner on November 12, 2007, 10:23 am
Please log in for more thread options Nithy wrote:
> If I run this code, it doesn't terminate when $count reach 0.9. Its
> keep on increasing. And after 5.9 its showing 5.99999999999999 & so
> on..
> But If I limits it within 0.8(if $count = 0.1 - 0.7), it gives the
> proper output. Why is it so?
You must have missed "Basics of Computer Numerics":
Thou shalt not test for equal on floating point numbers
'perldoc -q 999' gives a very brief introduction of why using floating point
numbers has it quirks in Perl, too, just like in any other standard
programming language.
jue
|
|
Posted by Nithy on November 13, 2007, 12:19 am
Please log in for more thread options > Nithy wrote:
> > If I run this code, it doesn't terminate when $count reach 0.9. Its
> > keep on increasing. And after 5.9 its showing 5.99999999999999 & so
> > on..
> > But If I limits it within 0.8(if $count =3D 0.1 - 0.7), it gives the
> > proper output. Why is it so?
>
> You must have missed "Basics of Computer Numerics":
> Thou shalt not test for equal on floating point numbers
>
> 'perldoc -q 999' gives a very brief introduction of why using floating po=
int
> numbers has it quirks in Perl, too, just like in any other standard
> programming language.
>
> jue
Thanks Jue..
|
| Similar Threads | Posted | | adding floating point | January 26, 2007, 9:25 pm |
| perl floating point problem | November 8, 2007, 10:09 am |
| How can I change a Perl floating-point value to a bit vector? | October 28, 2004, 7:29 pm |
| Can Perl be made to use IEEE floating=-point exception handling? | August 22, 2005, 11:53 am |
| floating bar in the line chart | April 21, 2008, 1:13 am |
| How to print at certain point in perl | July 19, 2006, 12:08 pm |
| At what (if any) point does InsideOut become OO-overkill? | December 5, 2006, 2:41 pm |
| What's the point of these lines of code? | May 22, 2007, 9:13 pm |
| Perl's @INC - am I missing the point? | April 17, 2008, 12:02 am |
| Starting Point for backup script | January 28, 2005, 3:16 am |
|
XML Sitemap