regex capture and assign... in one line?

[Nate Murray]

Question, I've been using Ruby for a while now and I have a perlism I
kind of miss.

Given

$str = "foo123";

my ($foo,$bar) = $str =~ /(\w+)(\d+)/;

# now we have
$foo; #=> "foo"
$bar; #=> "123"

I know that I can do this in Ruby in TWO lines, but I want to do it in
ONE line. Anyone have any ideas?

 

[Patrick Hurley]

Question, I've been using Ruby for a while now and I have a perlism I
kind of miss.

Given

$str = "foo123";

my ($foo,$bar) = $str =~ /(\w+)(\d+)/;

# now we have
$foo; #=> "foo"
$bar; #=> "123"

I know that I can do this in Ruby in TWO lines, but I want to do it in
ONE line. Anyone have any ideas?

Something like:

foo, bar = "foo123".match(/(\w+)(\d+)/).captures

p foo
p bar

pth

 

[Luiz Eduardo Roncato Cordeiro]

Something like:

foo, bar = "foo123".match(/(\w+)(\d+)/).captures

Better: foo, bar = "foo123".match(/(\D+)(\d+)/).captures

 

[dblack]

Hi --

Better: foo, bar = "foo123".match(/(\D+)(\d+)/).captures

The problem with using captures in a single line like this is that if
there's no match, you'll get an exception (NoMethodError for
nil#captures). The to_a technique, though it involves discarding the
first value, avoids this problem.


David

--
David A. Black | (e-mail address removed)
Author of "Ruby for Rails" [1] | Ruby/Rails training & consultancy [3]
DABlog (DAB's Weblog) [2] | Co-director, Ruby Central, Inc. [4]
[1] http://www.manning.com/black | [3] http://www.rubypowerandlight.com
[2] http://dablog.rubypal.com | [4] http://www.rubycentral.org

 

[Andrew Stewart]

Hello,

Given

$str = "foo123";

my ($foo,$bar) = $str =~ /(\w+)(\d+)/;

# now we have
$foo; #=> "foo"
$bar; #=> "123"

I know that I can do this in Ruby in TWO lines, but I want to do it in
ONE line. Anyone have any ideas?

m, foo, bar = *"foo123".match(/(\D+)(\d+)/)

Regards,
Andy Stewart

 

[William James]

Question, I've been using Ruby for a while now and I have a perlism I
kind of miss.

Given

$str = "foo123";

my ($foo,$bar) = $str =~ /(\w+)(\d+)/;

# now we have
$foo; #=> "foo"
$bar; #=> "123"

I know that I can do this in Ruby in TWO lines, but I want to do it in
ONE line. Anyone have any ideas?

str = "foo123"

foo, bar = str.split( /^(\D*)/ )[1..-1]

foo, bar = str.scan( /\D+|\d+/ )