hello,
in c++ I can write i++´´. The same in ruby:i=i+1´´.
Is there a better (shorter) way to increase a variable in ruby?
daniel
hello,
in c++ I can write
i++´´. The same in ruby:i=i+1´´.Is there a better (shorter) way to increase a variable in ruby?
i += 1
···
- daniel (offstuff@aon.at) wrote:
daniel
–
Paul Duncan pabs@pablotron.org pabs in #gah (OPN IRC)
http://www.pablotron.org/ OpenPGP Key ID: 0x82C29562
i += 1
···
— daniel offstuff@aon.at wrote:
hello,
in c++ I can write
i++´´. The same in ruby:i=i+1´´.Is there a better (shorter) way to increase a variable in ruby?
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daniel wrote:
hello,
in c++ I can write
i++´´. The same in ruby:i=i+1´´.
Hi Daniel,
how about
i += 1 ?
And, no there’s no way to do i++ in Ruby. For a discussion search this
news group (resp. mailing list).
Happy programming
Stephan
class Fixnum
def inc(val=1)
self += val
end
end
1.inc
“Stephan Kämper” Stephan.Kaemper@Schleswig-Holstein.de schrieb im
Newsbeitrag news:b5t2t0$2cuq4p$1@ID-96582.news.dfncis.de…
···
daniel wrote:
hello,
in c++ I can write
i++´´. The same in ruby:i=i+1´´.Hi Daniel,
how about
i += 1 ?
And, no there’s no way to do i++ in Ruby. For a discussion search this
news group (resp. mailing list).Happy programming
Stephan
irb(main):006:0> class Fixnum
irb(main):007:1> def inc(val=1)
irb(main):008:2> self += val
irb(main):009:2> end
irb(main):010:1> end
SyntaxError: compile error
(irb):8: Can’t change the value of self
self += val
^
from (irb):10
irb(main):011:0> ^C
(%:~)- ruby -v
ruby 1.6.7 (2002-03-19) [i386-linux]
Robert wrote:
···
class Fixnum
def inc(val=1)
self += val
end
end1.inc
“Stephan Kämper” Stephan.Kaemper@Schleswig-Holstein.de schrieb im
Newsbeitrag news:b5t2t0$2cuq4p$1@ID-96582.news.dfncis.de…daniel wrote:
hello,
in c++ I can write
i++´´. The same in ruby:i=i+1´´.Hi Daniel,
how about
i += 1 ?
And, no there’s no way to do i++ in Ruby. For a discussion search this
news group (resp. mailing list).Happy programming
Stephan
That doesn’t work, but ‘1.succ’ does.
···
On Thu, Mar 27, 2003 at 07:09:59AM +0900, Robert wrote:
class Fixnum
def inc(val=1)
self += val
end
end1.inc
–
Daniel Carrera
Graduate Teaching Assistant. Math Dept.
University of Maryland. (301) 405-5137
en banc: en banc (ahn-BAHNK) adjective, adverb
Having all the judges of a court present in a hearing.
Rodrigo,
I think Robert was being facetious.
This can’t work for a variety of reasons.
Robert’s point (I think) was: What do you
get if you increment a constant? It’s surely
wrong to change all values of 1 to something
else.
For example, if you actually could transform
the object 1 into the object 2, then this code
fragment
x = 1
y = 1.inc
puts x
would print 2 rather than 1.
The lack of a ++ operator (and the rationale
behind it) has been discussed many times over
the last three years or so.
If it’s not in the FAQ at
http://www.rubygarden.org/iowa/faqtotum –
well, it should be.
And you can also search the list archives at
www.ruby-talk.org (search for ++ or increment).
Cheers,
Hal
···
----- Original Message -----
From: rodrigo.bermejo@ps.ge.com
To: “ruby-talk ML” ruby-talk@ruby-lang.org
Sent: Wednesday, March 26, 2003 4:15 PM
Subject: Re: syntax
irb(main):006:0> class Fixnum
irb(main):007:1> def inc(val=1)
irb(main):008:2> self += val
irb(main):009:2> end
irb(main):010:1> end
SyntaxError: compile error
(irb):8: Can’t change the value of self
self += val
^
from (irb):10
irb(main):011:0> ^C
(%:~)- ruby -v
ruby 1.6.7 (2002-03-19) [i386-linux]Robert wrote:
class Fixnum
def inc(val=1)
self += val
end
end1.inc
In article 20030326231043.GA1684@math.umd.edu,
···
Daniel Carrera dcarrera@math.umd.edu wrote:
On Thu, Mar 27, 2003 at 07:09:59AM +0900, Robert wrote:
class Fixnum
def inc(val=1)
self += val
end
end1.inc
That doesn’t work, but ‘1.succ’ does.
But surely the original poster was really trying to get something like
i = 1
i.succ! # hypothetical
which is a tad different…
Mike
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