I'm actually hoping this is an embarrassing question but how do you get
the tail end of a string? All I've figured out is this:
index = 4
string[index, string.size - index]
...but surely there's a better way. This happens to me a lot and I
really appreciate Python's curt syntax in this case: string[index:]
What's the Ruby way?
Thank you!
Just Another Victim of the Ambient Morality wrote:
I'm actually hoping this is an embarrassing question but how do you get the tail end of a string? All I've figured out is this:
index = 4
string[index, string.size - index]...but surely there's a better way. This happens to me a lot and I really appreciate Python's curt syntax in this case: string[index:]
What's the Ruby way?
Thank you!
You mean like string[-1]?
I'm actually hoping this is an embarrassing question but how do you get
the tail end of a string? All I've figured out is this:index = 4
string[index, string.size - index]...but surely there's a better way. This happens to me a lot and I
really appreciate Python's curt syntax in this case: string[index:]
What's the Ruby way?Thank you!
str = "hello"
result = str[1..-1]
p result
--output:--
"ello"
--
Posted via http://www.ruby-forum.com/\.
Just Another Victim of the Ambient Morality wrote:
I'm actually hoping this is an embarrassing question but how do you get the tail end of a string? All I've figured out is this:
using reg-ex
irb(main):102:0> "quick brown fox".scan /.$/
=> ["x"]
irb(main):103:0> "yo mama".scan /.$/
=> ["a"]
See Reg-ex section here: Programming Ruby: The Pragmatic Programmer's Guide
You can convert the string into an array, and use Array.last and Array.pop methods to consume from the end
irb(main):090:0> letters = "quick brown fox".scan /./
=> ["q", "u", "i", "c", "k", " ", "b", "r", "o", "w", "n", " ", "f", "o", "x"]
irb(main):091:0> letters.last
=> "x"
irb(main):092:0> letters.pop
=> "x"
irb(main):093:0> letters.last
=> "o"
irb(main):094:0> letters.pop
=> "o"
irb(main):095:0> letters.last
=> "f"
irb(main):096:0> letters.pop
=> "f"
--
Kind Regards,
Rajinder Yadav
Do Good! - Share Freely, Enrich and Empower people to Transform their lives.
is equivalent to
string[index..-1]
-Thomas
2009/10/30 Just Another Victim of the Ambient Morality < ihatespam@hotmail.com>
I'm actually hoping this is an embarrassing question but how do you get
the tail end of a string? All I've figured out is this:index = 4
string[index, string.size - index]
--
Thomas Preymesser
thopre@gmail.com
Pablo Picasso<http://www.brainyquote.com/quotes/authors/p/pablo_picasso.html>
- "Computers are useless. They can only give you answers."
JAVoAM wrote:
I'm actually hoping this is an embarrassing question but how do you get
the tail end of a string? All I've figured out is this:index = 4
string[index, string.size - index]...but surely there's a better way. This happens to me a lot and I
really appreciate Python's curt syntax in this case: string[index:]
What's the Ruby way?
Thank you!
"123456".last 4
I don't even know if this was mentioned in the thread before or not, but
hey, there it is.
--
Posted via http://www.ruby-forum.com/\.
Hi,
a month ago, there was a discussion about what is the best way to
get a string's tail end. There were just some solutions like
str[-i,i]
str[-i..-1]
Those have some problems. They're not quite fast, they don't
return proper results for i>length.
Some time ago I wrote a method String#tail that has less than 20
lines of code. I decided to make an own project of it.
Step 1.0, of course, includes String#notempty?.
http://raa.ruby-lang.org/project/step/
Bertram
--
Bertram Scharpf
Stuttgart, Deutschland/Germany
http://www.bertram-scharpf.de
Michael W. Ryder wrote:
Just Another Victim of the Ambient Morality wrote:
I'm actually hoping this is an embarrassing question but how do you get the tail end of a string? All I've figured out is this:
index = 4
string[index, string.size - index]...but surely there's a better way. This happens to me a lot and I really appreciate Python's curt syntax in this case: string[index:]
What's the Ruby way?
Thank you!You mean like string[-1]?
I'm sorry, I missed the part about the index number of characters. Try string[-index, index].
7stud -- wrote:
I'm actually hoping this is an embarrassing question but how do you get
the tail end of a string? All I've figured out is this:index = 4
string[index, string.size - index]...but surely there's a better way. This happens to me a lot and I
really appreciate Python's curt syntax in this case: string[index:]
What's the Ruby way?Thank you!
str = "hello"
result = str[1..-1]p result
--output:--
"ello"
...which is very similar to python--except python doesn't include the
last index position in the slice:
str = "hello"
result = str[1:-1]
print result
--output:--
ell
--
Posted via http://www.ruby-forum.com/\.
Hi,
Am Freitag, 30. Okt 2009, 13:35:24 +0900 schrieb Rajinder Yadav:
Just Another Victim of the Ambient Morality wrote:
I'm actually hoping this is an embarrassing question but how do you
get the tail end of a string? All I've figured out is this:using reg-ex
irb(main):102:0> "quick brown fox".scan /.$/
=> ["x"]
Why scan? There's just one match.
"quick brown fox"[ /.\z/]
Bertram
--
Bertram Scharpf
Stuttgart, Deutschland/Germany
http://www.bertram-scharpf.de
Aldric Giacomoni wrote:
"123456".last 4
I don't even know if this was mentioned in the thread before or not, but
hey, there it is.
My apologies - this IRB session was a couple of days old, and I have
some Rails libraries loaded.. This is, I think, part of ActiveSupport or
ActiveRecord.
--
Posted via http://www.ruby-forum.com/\.
Oh, and I thought you implemented STEP in Ruby:
Cheers
robert
2009/12/1 Bertram Scharpf <lists@bertram-scharpf.de>:
Hi,
a month ago, there was a discussion about what is the best way to
get a string's tail end. There were just some solutions likestr[-i,i]
str[-i..-1]Those have some problems. They're not quite fast, they don't
return proper results for i>length.Some time ago I wrote a method String#tail that has less than 20
lines of code. I decided to make an own project of it.Step 1.0, of course, includes String#notempty?.
--
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/
Hi,
Michael W. Ryder wrote:
Just Another Victim of the Ambient Morality wrote:
I'm actually hoping this is an embarrassing question but how do you
get the tail end of a string? All I've figured out is this:index = 4
string[index, string.size - index]...but surely there's a better way.
You mean like string[-1]?
I'm sorry, I missed the part about the index number of characters. Try
string[-index, index].
That's really ugly. You shouldn't have to mention `index' twice.
I would even support a language extension to solve this problem.
For my private use I wrote a suite of methods
String#head
String#tail
String#starts_with
String#ends_with
Probably I should make an own gem of it. I'll think about that
this weekend. For so long have a look at my personal library:
http://bertram-scharpf.homelinux.com:8808/doc_root/bs-ruby-2.7/rdoc/classes/String.html
By the way: Still I'm convinced that there should be a
`String#notempty?' method corresponding to `Numeric#nonzero?'.
Bertram
Am Freitag, 30. Okt 2009, 13:25:05 +0900 schrieb Michael W. Ryder:
--
Bertram Scharpf
Stuttgart, Deutschland/Germany
http://www.bertram-scharpf.de
Hi,
Am Samstag, 31. Okt 2009, 01:54:10 +0900 schrieb Aldric Giacomoni:
Aldric Giacomoni wrote:
>
> "123456".last 4
>
> I don't even know if this was mentioned in the thread before or not, but
> hey, there it is.My apologies - this IRB session was a couple of days old, and I have
some Rails libraries loaded.. This is, I think, part of ActiveSupport or
ActiveRecord.
This proves that there is need for it :-)))))
scnr.
Bertram
--
Bertram Scharpf
Stuttgart, Deutschland/Germany
http://www.bertram-scharpf.de
Hi,
Just Another Victim of the Ambient Morality wrote:
I'm actually hoping this is an embarrassing question but how do youget the tail end of a string? All I've figured out is this:
using reg-ex
irb(main):102:0> "quick brown fox".scan /.$/
=> ["x"]Why scan? There's just one match.
"quick brown fox"[ /.\z/]
I like this and need to revisit a few things, thanks =)
On Fri, Oct 30, 2009 at 6:49 AM, Bertram Scharpf <lists@bertram-scharpf.de> wrote:
Am Freitag, 30. Okt 2009, 13:35:24 +0900 schrieb Rajinder Yadav:
Bertram
--
Bertram Scharpf
Stuttgart, Deutschland/Germany
http://www.bertram-scharpf.de
--
Kind Regards,
Rajinder Yadav
Do Good! - Share Freely, Enrich and Empower people to Transform their lives.
Bertram Scharpf wrote:
For my private use I wrote a suite of methods
[snip]
String#starts_with
String#ends_with
What's wrong with the built-in #start_with and #end_with, except the
incorrect grammar?
--
Posted via http://www.ruby-forum.com/\.
Hi --
On Fri, 30 Oct 2009, Bertram Scharpf wrote:
Hi,
Am Freitag, 30. Okt 2009, 13:25:05 +0900 schrieb Michael W. Ryder:
Michael W. Ryder wrote:
Just Another Victim of the Ambient Morality wrote:
I'm actually hoping this is an embarrassing question but how do you
get the tail end of a string? All I've figured out is this:index = 4
string[index, string.size - index]...but surely there's a better way.
You mean like string[-1]?
I'm sorry, I missed the part about the index number of characters. Try
string[-index, index].That's really ugly. You shouldn't have to mention `index' twice.
I don't think there's anything wrong with it. It works well, and
there's nothing stylistically wrong with using a local variable twice.
If index is a method that does a (re)calculation every time, you'd
want to cache it, but that's not the case in the example.
David
--
The Ruby training with D. Black, G. Brown, J.McAnally
Compleat Jan 22-23, 2010, Tampa, FL
Rubyist http://www.thecompleatrubyist.com
David A. Black/Ruby Power and Light, LLC (http://www.rubypal.com)
Bertram Scharpf wrote:
By the way: Still I'm convinced that there should be a
`String#notempty?' method corresponding to `Numeric#nonzero?'.
class String
def notempty?
!self.empty?
end
end
Good enough?
--
Posted via http://www.ruby-forum.com/\.
Bertram Scharpf wrote:
Hi,
You mean like string[-1]?
I'm sorry, I missed the part about the index number of characters. Try
string[-index, index].That's really ugly. You shouldn't have to mention `index' twice.
And you don't. string[-index..-1] does the trick.
I would even support a language extension to solve this problem.
No need.
Best,
Am Freitag, 30. Okt 2009, 13:25:05 +0900 schrieb Michael W. Ryder:
--
Marnen Laibow-Koser
http://www.marnen.org
marnen@marnen.org
--
Posted via http://www.ruby-forum.com/\.
Bertram Scharpf wrote:
Hi,
Michael W. Ryder wrote:
Just Another Victim of the Ambient Morality wrote:
I'm actually hoping this is an embarrassing question but how do you get the tail end of a string? All I've figured out is this:
index = 4
string[index, string.size - index]...but surely there's a better way.
You mean like string[-1]?
I'm sorry, I missed the part about the index number of characters. Try string[-index, index].
That's really ugly. You shouldn't have to mention `index' twice.
I would even support a language extension to solve this problem.For my private use I wrote a suite of methods
String#head
String#tail
String#starts_with
String#ends_with
Just out of curiosity, do your methods work in a case like:
a="123456"
index = 12
puts a(-index, index)
This is the only place where my code fails as it does not check to make sure that index is not greater than a.length.
Am Freitag, 30. Okt 2009, 13:25:05 +0900 schrieb Michael W. Ryder:
Probably I should make an own gem of it. I'll think about that
this weekend. For so long have a look at my personal library:http://bertram-scharpf.homelinux.com:8808/doc_root/bs-ruby-2.7/rdoc/classes/String.html
By the way: Still I'm convinced that there should be a
`String#notempty?' method corresponding to `Numeric#nonzero?'.Bertram