works = Array.new
session[:cart_works].each_pair {|key, value| works << key if
value == user_id}
how to initialize the works array in the bloc ?
thanks for your lights
erwin
session[:cat_works].each_pair do |key, value| works = Array.new unless
works
works << key if value == user_id
end
On Sat, Sep 6, 2008 at 8:14 PM, Erwin [email protected] wrote:
works = Array.new session[:cart_works].each_pair {|key, value| works << key ifvalue == user_id}
how to initialize the works array in the bloc ?
Maybe:
works = session[:cart_works].inject([]) {|w, (k,v)| (v== user_id)? w +
[k]: w}
Jesus.
On Sat, Sep 6, 2008 at 7:14 PM, Erwin [email protected] wrote:
works = Array.new session[:cart_works].each_pair {|key, value| works << key ifvalue == user_id}
how to initialize the works array in the bloc ?
On Sat, Sep 6, 2008 at 8:19 PM, Dave G. [email protected]
wrote:
session[:cat_works].each_pair do |key, value| works = Array.new unless
works
works << key if value == user_id
end
I think that in this case works is not visible outside of the block
(unless you already had it defined, which kind of defeats the purpose):
irb(main):007:0> h.each_pair {|k,v| arr = Array.new unless arr; arr <<
k if v==3}
=> {:c=>3, :a=>3, :b=>5}
irb(main):008:0> arr
NameError: undefined local variable or method `arr’ for main:Object
from (irb):8
Jesus.
On Sep 6, 7:17 pm, Erwin [email protected] wrote:
works = Array.new session[:cart_works].each_pair {|key, value| works << key ifvalue == user_id}
how to initialize the works array in the bloc ?
thanks for your lights
erwin
works = session[:cart_works].keys.select { |key| session[:cart_works]
[:key] == user_id }
works = Array.new; session[:cart_works].each_pair {|key, value| works
<<
key if value == user_id}
there! fits in one line
On Sun, Sep 7, 2008 at 12:06 AM, Jesús Gabriel y Galán <
On Sep 6, 1:17 pm, Erwin [email protected] wrote:
works = Array.new
works = []
Instead of
name = String.new
one says
name = “”
session[:cart_works].each_pair {|key, value| works << key ifvalue == user_id}
how to initialize the works array in the bloc ?
thanks for your lights
erwin
h = Hash[ * %w(apple red lemon yellow bananna yellow orange orange) ]
==>{“bananna”=>“yellow”, “apple”=>“red”, “orange”=>“orange”,
“lemon”=>“yello
w”}
a = h.keys.select{|k| ‘yellow’==h[k] }
==>[“bananna”, “lemon”]
Oops, I mean:
works = session[:cart_works].keys.select { |key| session[:cart_works]
[key] == user_id }
Hi –
On Sun, 7 Sep 2008, William J. wrote:
name = “”
I tend to use the literal constructors, but either technique is OK. I
believe some people like to use Array.new consistently since sometimes
they actually need it (with arguments).
David
On 06.09.2008 20:17, Erwin wrote:
works = Array.new session[:cart_works].each_pair {|key, value| works << key ifvalue == user_id}
how to initialize the works array in the bloc ?
You cannot do it inside the block because then it is not know after the
block because of how the scoping works:
$ ruby -e ‘[1].each { w = 10 }; p w’
-e:1: undefined local variable or method `w’ for main:Object (NameError)
You can do
works = session[:cart_works].inject [] do |w,(k,v)|
w << k if v == user_id
w
end
works = session[:cart_works].select {|k,v| v == user_id}.map {|k,v| k}
Kind regards
robert
On Sep 6, 11:17 am, Erwin [email protected] wrote:
works = Array.new session[:cart_works].each_pair {|key, value| works << key ifvalue == user_id}
how to initialize the works array in the bloc ?
thanks for your lights
erwin
h = Hash[ * %w(apple red lemon yellow bananna yellow orange orange) ]
h.clone.delete_if { |k,v| v != ‘yellow’ }.keys
Jean-Michel
On Mon, Sep 8, 2008 at 8:18 AM, Michael F.
[email protected] wrote:
On Sun, Sep 7, 2008 at 3:14 AM, Erwin [email protected] wrote:
works = Array.new session[:cart_works].each_pair {|key, value| works << key ifvalue == user_id}
works = session[:cart_works].reject{|k,v| not v == user_id }.keys
Sorry, hit send too early ^^;
^ manveru
On 6 sep, 21:04, Rico [email protected] wrote:
erwin
works = session[:cart_works].keys.select { |key| session[:cart_works]
[:key] == user_id }
thanks a lot, all answers show exactly what I was looking for, …
On Sun, Sep 7, 2008 at 3:14 AM, Erwin [email protected] wrote:
works = Array.new session[:cart_works].each_pair {|key, value| works << key ifvalue == user_id}
works = session[:cart_works].reject{|k,v| v == user_id }.keys
On 6 sep, 21:16, William J. [email protected] wrote:
one says
erwin
h = Hash[ * %w(apple red lemon yellow bananna yellow orange orange) ]
==>{“bananna”=>“yellow”, “apple”=>“red”, “orange”=>“orange”,
“lemon”=>“yello
w”}
a = h.keys.select{|k| ‘yellow’==h[k] }
==>[“bananna”, “lemon”]
thanks a lot…
On 7 sep, 16:50, Jean-Michel [email protected] wrote:
erwin
h = Hash[ * %w(apple red lemon yellow bananna yellow orange orange) ]
h.clone.delete_if { |k,v| v != ‘yellow’ }.keysJean-Michel
thanks a lot …
On 7 sep, 10:37, Robert K. [email protected] wrote:
works = session[:cart_works].select {|k,v| v == user_id}.map {|k,v| k}
Kind regards
robert
thanks Robert ! I have to look a little bit into the .select …