Hi!
Could someone please help me understanding why the next two lines of
code are different?
next unless line =~ /=/
next if !line =~ /=/
Thanks,
Marco
···
--
Posted via http://www.ruby-forum.com/.
Marco Lazzeri wrote:
Could someone please help me understanding why the next two lines of
code are different?next unless line =~ /=/
next if !line =~ /=/
I found out: it's a operators precedence problem.
next unless line =~ /=/
next if !(line =~ /=/) # with parenthesis
Marco
···
--
Posted via http://www.ruby-forum.com/\.
Marco Lazzeri wrote:
Hi!
Could someone please help me understanding why the next two lines of
code are different?next unless line =~ /=/
next if !line =~ /=/
Thanks,
Marco
I suspect !line =~ /=/ is not the same as !(line =~ /=/). Do you have
more of an example that people can run in IRB to verify?
···
--
Posted via http://www.ruby-forum.com/\.
harp:~ > cat a.rb
require 'yaml'
y "!'foobar'" => (!'foobar')
y "!'foobar' =~ /barfoo/" => (!'foobar' =~ /barfoo/)
y "false =~ /barfoo/" => (false =~ /barfoo/)
y "'foobar' !~ /barfoo/" => ('foobar' !~ /barfoo/)
harp:~ > ruby a.rb
a.rb:3: warning: string literal in condition
a.rb:4: warning: string literal in condition
"!'foobar'": false
"!'foobar' =~ /barfoo/": false
false =~ /barfoo/: false
"'foobar' !~ /barfoo/": true
! binds more tightly that =~
-a
···
On Fri, 25 Aug 2006, Marco Lazzeri wrote:
Hi!
Could someone please help me understanding why the next two lines of
code are different?next unless line =~ /=/
next if !line =~ /=/
Thanks,
Marco
--
to foster inner awareness, introspection, and reasoning is more efficient than
meditation and prayer.
- h.h. the 14th dalai lama
Note that you can also negate the match operator:
next if line !~ /=/
... or you use "not"
next if not line =~ /=/
My personal favorite here is your first one
next unless line =~ /=/
because it reads nice and clear.
Kind regards
robert
···
On 25.08.2006 16:37, Marco Lazzeri wrote:
Marco Lazzeri wrote:
Could someone please help me understanding why the next two lines of code are different?
next unless line =~ /=/
next if !line =~ /=/
I found out: it's a operators precedence problem.
next unless line =~ /=/
next if !(line =~ /=/) # with parenthesis
Have you considered this alternative?
next if line !~ /=/
/me stirs the pot a little.
···
On Fri, Aug 25, 2006 at 11:37:25PM +0900, Marco Lazzeri wrote:
Marco Lazzeri wrote:
> Could someone please help me understanding why the next two lines of
> code are different?
>
> next unless line =~ /=/
>
> next if !line =~ /=/I found out: it's a operators precedence problem.
next unless line =~ /=/
next if !(line =~ /=/) # with parenthesis
--
CCD CopyWrite Chad Perrin [ http://ccd.apotheon.org ]
"The ability to quote is a serviceable
substitute for wit." - W. Somerset Maugham