* splat error

Kerwin_Franks · 4 May 2010 09:07

Hello, i need some help here, when i run the following code i get the
error below. Why is that, according to the textbook it should work, also
looked it up in the cookbook, no luck there too. Thanks in advance.

def split_apart(first, *splat, last)
puts "first: #{first.inspect}, splat: #{splat.inspect}, " +
"last: #{last.inspect}"
end

split_apart(1,2)
split_apart(1, 2, 3)

Error:

/home/gribota1/NetBeansProjects/Analyzer/lib/rubymethods.rb:32: syntax
error, unexpected tIDENTIFIER, expecting tAMPER or '&'
def split_apart(first, *splat, last)
^

···

--
Posted via http://www.ruby-forum.com/.

Robert_K1 · 4 May 2010 09:16

10:49:13 test_2$ allruby -ce 'def s(a,*b,c) end'
CYGWIN_NT-5.1 padrklemme1 1.7.5(0.225/5/3) 2010-04-12 19:07 i686 Cygwin

···

2010/5/4 Kerwin Franks <kerwinfranks@yahoo.co.uk>:

Hello, i need some help here, when i run the following code i get the
error below. Why is that, according to the textbook it should work, also
looked it up in the cookbook, no luck there too. Thanks in advance.

def split_apart(first, *splat, last)
puts "first: #{first.inspect}, splat: #{splat.inspect}, " +
"last: #{last.inspect}"
end

split_apart(1,2)
split_apart(1, 2, 3)

Error:

/home/gribota1/NetBeansProjects/Analyzer/lib/rubymethods.rb:32: syntax
error, unexpected tIDENTIFIER, expecting tAMPER or '&'
def split_apart(first, *splat, last)
^

========================================
ruby 1.8.7 (2008-08-11 patchlevel 72) [i386-cygwin]
-e:1: syntax error, unexpected tIDENTIFIER, expecting tAMPER or '&'
def s(a,*b,c) end
^

ruby 1.9.1p378 (2010-01-10 revision 26273) [i386-cygwin]
Syntax OK

jruby 1.4.0 (ruby 1.8.7 patchlevel 174) (2009-11-02 69fbfa3) (Java
HotSpot(TM) Client VM 1.6.0_20) [x86-java]
SyntaxError in -e:1: , unexpected tIDENTIFIER

def s(a,*b,c) end
^
11:16:32 test_2$

Cheers

robert

--
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/

Brian_Candler · 4 May 2010 10:18

Ruby Knight wrote:

Hello, i need some help here, when i run the following code i get the
error below. Why is that, according to the textbook it should work, also
looked it up in the cookbook, no luck there too. Thanks in advance.

def split_apart(first, *splat, last)

What Robert is saying is that is valid syntax for ruby 1.9, but not for
ruby 1.8.

I don't know what "the textbook" and "the cookbook" are that you refer
to, but they were probably written for 1.9.

ruby 1.9 is a substantially different language to ruby 1.8, which you
probably wouldn't expect from the "minor" version bump.

···

--
Posted via http://www.ruby-forum.com/\.

Kerwin_Franks · 4 May 2010 09:31

def s(a,*b,c) end
^
11:16:32 test_2$

Cheers

robert

Hi Robert,

I tried putting end after the last brace but didn't work. I am assuming
there is more to that ^ than just for illustrative purposes. Could you
explain to me why my code is not working? THanks!

···

--
Posted via http://www.ruby-forum.com/\.

Kerwin_Franks · 4 May 2010 10:35

Thanks guys for all the input as well as the timely responses! I have to
upgrade my Ruby version then, i thought i had the latest version
installed but seems not.

Regards

···

--
Posted via http://www.ruby-forum.com/.

Charles_Nutter · 8 May 2010 04:50

FYI:

~/projects/jruby ➔ jruby -e "def s(a,*b,c) end"
:1: -e:1: syntax error, unexpected tIDENTIFIER (SyntaxError)

def s(a,*b,c) end
^

~/projects/jruby ➔ jruby --1.9 -e "def s(a,*b,c) end"

~/projects/jruby ➔

Gotta love an interpreter that's two for the price of one

···

On Tue, May 4, 2010 at 4:16 AM, Robert Klemme <shortcutter@googlemail.com> wrote:

2010/5/4 Kerwin Franks <kerwinfranks@yahoo.co.uk>:

Hello, i need some help here, when i run the following code i get the
error below. Why is that, according to the textbook it should work, also
looked it up in the cookbook, no luck there too. Thanks in advance.

def split_apart(first, *splat, last)
puts "first: #{first.inspect}, splat: #{splat.inspect}, " +
"last: #{last.inspect}"
end

split_apart(1,2)
split_apart(1, 2, 3)

Error:

/home/gribota1/NetBeansProjects/Analyzer/lib/rubymethods.rb:32: syntax
error, unexpected tIDENTIFIER, expecting tAMPER or '&'
def split_apart(first, *splat, last)
^

10:49:13 test_2$ allruby -ce 'def s(a,*b,c) end'
CYGWIN_NT-5.1 padrklemme1 1.7.5(0.225/5/3) 2010-04-12 19:07 i686 Cygwin

ruby 1.8.7 (2008-08-11 patchlevel 72) [i386-cygwin]
-e:1: syntax error, unexpected tIDENTIFIER, expecting tAMPER or '&'
def s(a,*b,c) end
^

ruby 1.9.1p378 (2010-01-10 revision 26273) [i386-cygwin]
Syntax OK

jruby 1.4.0 (ruby 1.8.7 patchlevel 174) (2009-11-02 69fbfa3) (Java
HotSpot(TM) Client VM 1.6.0_20) [x86-java]
SyntaxError in -e:1: , unexpected tIDENTIFIER

def s(a,*b,c) end
^
11:16:32 test_2$

Cheers

robert

--
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/

Justin_Collins · 4 May 2010 09:55

Ruby Knight wrote:

def s(a,*b,c) end
^
11:16:32 test_2$

Cheers

robert

Hi Robert,

I tried putting end after the last brace but didn't work. I am assuming there is more to that ^ than just for illustrative purposes. Could you explain to me why my code is not working? THanks!

In Ruby, formal parameters have a particular order:

def s(required, default="default", *variable_args, &block)

You cannot have a regular required parameter after an optional parameter (denoted by *). The only thing you can have is a block parameter (denoted by &) or nothing at all.

-Justin

Josh_Cheek · 4 May 2010 10:14

Robert is saying that it works in 1.9.1 (see how it says Syntax OK), but not
1.8.7 (where it pulls up the same error you had)

For 1.9, you can do something like this

def split_apart( first , *splat )
  raise ArgumentError.new('wrong number of arguments (1 for 2)') if
splat.size.zero?
  last = splat.pop
  puts "first: #{first.inspect}, splat: #{splat.inspect}, last:
#{last.inspect}"
end

Though I probably wouldn't bother with the error myself, unless writing code
for other people.

This is similar to how Rails' find method works, it checks the last argument
to see if it is a hash, then if it is, it pops it off (look at their example
in the comments)

github.com

rails/rails/blob/main/activesupport/lib/active_support/core_ext/array/extract_options.rb

# frozen_string_literal: true

class Hash
  # By default, only instances of Hash itself are extractable.
  # Subclasses of Hash may implement this method and return
  # true to declare themselves as extractable. If a Hash
  # is extractable, Array#extract_options! pops it from
  # the Array when it is the last element of the Array.
  def extractable_options?
    instance_of?(Hash)
  end
end

class Array
  # Extracts options from a set of arguments. Removes and returns the last
  # element in the array if it's a hash, otherwise returns a blank hash.
  #
  #   def options(*args)
  #     args.extract_options!
  #   end

This file has been truncated. show original

···

On Tue, May 4, 2010 at 4:31 AM, Ruby Knight <kerwinfranks@yahoo.co.uk>wrote:

>
> def s(a,*b,c) end
> ^
> 11:16:32 test_2$
>
> Cheers
>
> robert

Hi Robert,

I tried putting end after the last brace but didn't work. I am assuming
there is more to that ^ than just for illustrative purposes. Could you
explain to me why my code is not working? THanks!

--
Posted via http://www.ruby-forum.com/\.

Josh_Cheek · 4 May 2010 22:51

http://rvm.beginrescueend.com/

···

On Tue, May 4, 2010 at 5:35 AM, Ruby Knight <kerwinfranks@yahoo.co.uk>wrote:

Thanks guys for all the input as well as the timely responses! I have to
upgrade my Ruby version then, i thought i had the latest version
installed but seems not.

Regards

--
Posted via http://www.ruby-forum.com/\.

I've been pretty happy with rvm

Forum · 4 May 2010 10:17

<snip>
It is legal in 1.9 and illegal in 1.8
HTH
R.

···

On Tue, May 4, 2010 at 11:55 AM, Justin Collins <justincollins@ucla.edu> wrote:

David_A_Black1 · 4 May 2010 10:22

Hi --

<snip>
It is legal in 1.9 and illegal in 1.8

Ditto in arrays as well as parameter lists. (Kind of interesting that
1.8.7 also gives the useless literal error.)

$ ruby -ve '[1,2,*[3,4],5]'
ruby 1.8.7 (2008-05-31 patchlevel 0) [i686-darwin9.8.0]
-e:1: syntax error, unexpected ',', expecting ']'
[1,2,*[3,4],5]
^
-e:1: warning: useless use of a literal in void context

$ ruby191 -ve 'p [1,2,*[3,4],5]'
ruby 1.9.1p376 (2009-12-07 revision 26041) [i386-darwin9.8.0]
[1, 2, 3, 4, 5]

David

···

On Tue, 4 May 2010, Robert Dober wrote:

On Tue, May 4, 2010 at 11:55 AM, Justin Collins <justincollins@ucla.edu> wrote:

--
David A. Black, Senior Developer, Cyrus Innovation Inc.

THE Ruby training with Black/Brown/McAnally
COMPLEAT Coming to Chicago area, June 18-19, 2010!
RUBYIST http://www.compleatrubyist.com

Justin_Collins · 4 May 2010 20:46

Robert Dober wrote:

···

On Tue, May 4, 2010 at 11:55 AM, Justin Collins <justincollins@ucla.edu> wrote:
<snip>
It is legal in 1.9 and illegal in 1.8
HTH
R.

Hmmm...noted.

-Justin

Topic		Replies	Views
NoMethodError split for array using splat operator ruby-talk	5	186	6 May 2013
[BUG] Unexpected syntax error ruby-talk	4	69	20 February 2006
Syntax error with array interpolation ruby-talk	2	121	25 June 2007
Syntax error with array interpolation ruby-talk	1	113	25 June 2007
Splat question ruby-talk	12	94	14 April 2003

* splat error

======================================== ruby 1.8.7 (2008-08-11 patchlevel 72) [i386-cygwin] -e:1: syntax error, unexpected tIDENTIFIER, expecting tAMPER or '&' def s(a,*b,c) end ^

ruby 1.9.1p378 (2010-01-10 revision 26273) [i386-cygwin] Syntax OK

10:49:13 test_2$ allruby -ce 'def s(a,*b,c) end' CYGWIN_NT-5.1 padrklemme1 1.7.5(0.225/5/3) 2010-04-12 19:07 i686 Cygwin

ruby 1.8.7 (2008-08-11 patchlevel 72) [i386-cygwin] -e:1: syntax error, unexpected tIDENTIFIER, expecting tAMPER or '&' def s(a,*b,c) end ^

ruby 1.9.1p378 (2010-01-10 revision 26273) [i386-cygwin] Syntax OK

Related topics

========================================
ruby 1.8.7 (2008-08-11 patchlevel 72) [i386-cygwin]
-e:1: syntax error, unexpected tIDENTIFIER, expecting tAMPER or '&'
def s(a,*b,c) end
^

ruby 1.9.1p378 (2010-01-10 revision 26273) [i386-cygwin]
Syntax OK

10:49:13 test_2$ allruby -ce 'def s(a,*b,c) end'
CYGWIN_NT-5.1 padrklemme1 1.7.5(0.225/5/3) 2010-04-12 19:07 i686 Cygwin

ruby 1.8.7 (2008-08-11 patchlevel 72) [i386-cygwin]
-e:1: syntax error, unexpected tIDENTIFIER, expecting tAMPER or '&'
def s(a,*b,c) end
^

ruby 1.9.1p378 (2010-01-10 revision 26273) [i386-cygwin]
Syntax OK