Hello
short question:
Is there a way to downcase a string without executing a block
- Like in perl: \Lstring
x="abc"
sg like $_.gsub(x, "\L$1") .... instead gsub((x)){$1.downcase}
Thx Berg
Dude, are you kidding? I'm not even going to paste a link. Try harder.
···
On Wed, Sep 21, 2016 at 11:23 AM A Berger <aberger7890@gmail.com> wrote:
Hello
short question:
Is there a way to downcase a string without executing a block
- Like in perl: \Lstringx="abc"
sg like $_.gsub(x, "\L$1") .... instead gsub((x)){$1.downcase}Thx Berg
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- Raj
Hi
I didnt find a solution,
so I ask, if there is a way.
A simple "not possible" would be a nice answer. (Not finding anything,
doesnt mean, there is no way!)
Thx Berg
···
Am 21.09.2016 21:05 schrieb "Raj Sahae" <rajsahae@gmail.com>:
Dude, are you kidding? I'm not even going to paste a link. Try harder.
On Wed, Sep 21, 2016 at 11:23 AM A Berger <aberger7890@gmail.com> wrote:
Hello
short question:
Is there a way to downcase a string without executing a block
- Like in perl: \Lstringx="abc"
sg like $_.gsub(x, "\L$1") .... instead gsub((x)){$1.downcase}Thx Berg
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- Raj
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Hey, unless I misunderstand, I think Raj was suggesting you look at Ruby
differently than Perl.
"ABC".downcase # Gives "abc"
Leam
···
On Wed, Sep 21, 2016 at 3:25 PM, A Berger <aberger7890@gmail.com> wrote:
Hi
I didnt find a solution,
so I ask, if there is a way.
A simple "not possible" would be a nice answer. (Not finding anything,
doesnt mean, there is no way!)Thx Berg
Am 21.09.2016 21:05 schrieb "Raj Sahae" <rajsahae@gmail.com>:Dude, are you kidding? I'm not even going to paste a link. Try harder.
On Wed, Sep 21, 2016 at 11:23 AM A Berger <aberger7890@gmail.com> wrote:
Hello
short question:
Is there a way to downcase a string without executing a block
- Like in perl: \Lstringx="abc"
sg like $_.gsub(x, "\L$1") .... instead gsub((x)){$1.downcase}Thx Berg
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- Raj
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Mind on a Mission <http://leamhall.blogspot.com/>
Hi
yes, but how to change only special patterns (-> gsub) ?
\L is much easier then {...}
Bye Berg
···
Am 21.09.2016 21:29 schrieb "leam hall" <leamhall@gmail.com>:
Hey, unless I misunderstand, I think Raj was suggesting you look at Ruby
differently than Perl."ABC".downcase # Gives "abc"
Leam
On Wed, Sep 21, 2016 at 3:25 PM, A Berger <aberger7890@gmail.com> wrote:
Hi
I didnt find a solution,
so I ask, if there is a way.
A simple "not possible" would be a nice answer. (Not finding anything,
doesnt mean, there is no way!)Thx Berg
Am 21.09.2016 21:05 schrieb "Raj Sahae" <rajsahae@gmail.com>:Dude, are you kidding? I'm not even going to paste a link. Try harder.
On Wed, Sep 21, 2016 at 11:23 AM A Berger <aberger7890@gmail.com> wrote:
Hello
short question:
Is there a way to downcase a string without executing a block
- Like in perl: \Lstringx="abc"
sg like $_.gsub(x, "\L$1") .... instead gsub((x)){$1.downcase}Thx Berg
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?subject=unsubscribe>
<http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-talk>--
- Raj
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Hi,
···
On 2016/09/22 4:37, A Berger wrote:
Hi
yes, but how to change only special patterns (-> gsub) ?
\L is much easier then {...}
I don't know what \L means in Perl, but how's this?
[1] pry(main)> "ABCDEF".gsub(/CD/, &:downcase)
=> "ABcdEF"
[2] pry(main)>
Toshi
Toshi, nice! I didn't know about that!
···
###
On Wed, Sep 21, 2016 at 4:41 PM, Toshihiko Ichida <dogatana@gmail.com> wrote:
[1] pry(main)> "ABCDEF".gsub(/CD/, &:downcase)
=> "ABcdEF"
[2] pry(main)>
Toshi
###
Mind on a Mission <http://leamhall.blogspot.com/>
It's basically shorthand for passing a block. Just like how you could say
["foo", "bar"].map(&:upcase)
rather than
["foo", "bar"].map { |str| str.upcase }
···
On Wed, Sep 21, 2016 at 5:08 PM, leam hall <leamhall@gmail.com> wrote:
Toshi, nice! I didn't know about that!
###
On Wed, Sep 21, 2016 at 4:41 PM, Toshihiko Ichida <dogatana@gmail.com> > wrote:[1] pry(main)> "ABCDEF".gsub(/CD/, &:downcase)
=> "ABcdEF"
--
Dave Aronson, consulting software developer of Codosaur.us,
PullRequestRoulette.com, Blog.Codosaur.us, and Dare2XL.com.
It's the same principle as some_array_of_strings.map(&:downcase), that is,
it leverages the "&:" shortcut which uses an implicit call to
Symbol#to_proc method. You are still using a block/proc but the syntactic
sugar makes it much less verbose to type.
···
On Wed, Sep 21, 2016 at 2:08 PM leam hall <leamhall@gmail.com> wrote:
Toshi, nice! I didn't know about that!
###
On Wed, Sep 21, 2016 at 4:41 PM, Toshihiko Ichida <dogatana@gmail.com> > wrote:[1] pry(main)> "ABCDEF".gsub(/CD/, &:downcase)
=> "ABcdEF"
[2] pry(main)>Toshi
###Mind on a Mission <http://leamhall.blogspot.com/>
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- Raj
Hi!
thats the solution I was looking for -
nowhere declared, that the block can be given as second param.
Thanks to Toshi!
Berg
But looks like there is no way to cascade that?
like \L\U => ...(&:downcase.&:upcase)
(ok, not a very useful example... 
Cheers Berg
Hi,
But looks like there is no way to cascade that?
like \L\U => ...(&:downcase.&:upcase)(ok, not a very useful example...
Unfortunately, not..
In that case we need to use a block or a proc object.
If you
- want to simply process the matched data with applying methods
- call sub/gsub many times
using a proc object may save your time 
[4] pry(main)> p = ->(x) { x.downcase.upcase }
=> #<Proc:0x546a5d8@(pry):4 (lambda)>
[5] pry(main)> "AbCdEf".sub(/Cd/, &p)
=> "AbCDEf"
[6] pry(main)> "GhIjKl".sub(/Ij/, &p)
=> "GhIJKl"
···
On 2016/09/22 16:51, A Berger wrote:
--
Toshi