Re: Change decimal point temporarily

[ikegami]

in reply to Change decimal point temporarily

my $s = 123.45;
$s =~ s/\./,/;

[lima1]

I was unclear. It should work automatically. With a regex, I first have to test whether it is a numeric field. Obviously, I don't want to replace points in text columns.

[ikegami]

use Scalar::Util qw( looks_like_number );

my $s = 123.45;
$s =~ s/\./,/ if looks_like_number($s);

Works even better than setlocale because you are surely starting with the number in string form if you don't know whether a column contains a number or not.

[Jenda]

use Scalar::Util qw( looks_like_number );
print looks_like_number('12,48');
# --> 0

He's PARSING a csv (or more probably a tab or semicolon separated file) so he needs to go exactly the other way around. Accept 12,48 and treat it as a number.

[fod]

Or... I suppose if we have a digit either size of a '.' then it's probably a number with a decimal point:

$s = "123.45";
$s =~ s/(?<=\d)\.(?=\d)/,/;

ALthough... I don't quite understand what you're trying to do - surely if you're parsing a CSV file containing numbers with decimal points you'd rather they weren't commas?

[lima1]

The motivation is a feature for the module described in RFC: Text::CSV::R. It is an option to set the decimal point. In Germany for example, it is common for CSV files to use a comma as decimal point and a semicolon as field separator.

So I guess a locale approach would be the performance-wise fastest solution. But setting the locale to an arbitrary locale which uses a comma (de_DE, fr_Fr,...) just to change this single parameter seems like hack.