hello,
my code in ruby looks like this…
···
–
i=0
arr_stuff.each {
a>
$tk_listbox_stuff.insert( i, a.to_s)
i += 1
}
–
I really love the c++ style with
++i
or
i++
Is there a smart way to do such things in ruby?
daniel
In the above example there’s an even smarter way:
arr_stuff.each_with_index { |a,i|
$tk_listbox_stuff.insert( i, a.to_s)
}
Neat, huh?
You can’t do “i++” or “i.succ!” because in Ruby numbers are immutable
objects, and variables always hold references to objects. When ‘i’ contains
a reference to the number 3, say, you can’t send a message to the number 3
saying “turn yourself into 4”.
All you can do is change ‘i’ to point to a new object, the number 4. The
only way you can change what a local variable points to is via assignment:
i = … some object …
Hence: i = (i+1), or i += 1 which expands to the same thing.
Regards,
Brian.
···
On Fri, Mar 28, 2003 at 06:54:58AM +0900, daniel wrote:
my code in ruby looks like this…
i=0
arr_stuff.each {a>
$tk_listbox_stuff.insert( i, a.to_s)
i += 1
}
–I really love the c++ style with
++i
or
i++Is there a smart way to do such things in ruby?
daniel wrote:
my code in ruby looks like this…
i=0
arr_stuff.each {a>
$tk_listbox_stuff.insert( i, a.to_s)
i += 1
}
–I really love the c++ style with
++i
or
i++Is there a smart way to do such things in ruby?
Did you just not like the answers that you got when you asked this
question yesterday? 
not preinc or postinc, but
arr.size.times do |i|
$tk_listbox_stuff.insert i, a[i].to_s
end
or
arr.each_with_index do |a,i|
$tk_listbox_stuff.insert i, a.to_s
end
-a
···
On Thu, 27 Mar 2003, daniel wrote:
hello,
my code in ruby looks like this…
i=0
arr_stuff.each {a>
$tk_listbox_stuff.insert( i, a.to_s)
i += 1
}
–I really love the c++ style with
++i
or
i++Is there a smart way to do such things in ruby?
–
Ara Howard
NOAA Forecast Systems Laboratory
Information and Technology Services
Data Systems Group
R/FST 325 Broadway
Boulder, CO 80305-3328
Email: ahoward@fsl.noaa.gov
Phone: 303-497-7238
Fax: 303-497-7259
====================================
Avoiding the question of i++, a common idiom (if a google search for
“ruby tklistbox” is any indication) would be:
arr_stuff.each { |a|
$tk_listbox_stuff.insert(‘end’, a.to_s)
}
But even that seems unnecessarily verbose. According to the Perl/Tk
documentation (there doesn’t seem to be any Ruby/Tk documentation,
but Programming Ruby suggests Perl/Tk as an alternative) the #insert
method should be able to insert multiple items:
$tk_listbox_stuff.insert(‘end’, *arr_stuff)
Note that the above is untested (no Tk here) and that it also omits
an explicit #to_s on the array elements (a peek at tk.rb shows that
Ruby objects are automatically converted to Tcl strings).
···
“daniel” offstuff@aon.at wrote:
i=0
arr_stuff.each {a>
$tk_listbox_stuff.insert( i, a.to_s)
i += 1
}
–
Tabby
Lyle Johnson lyle@users.sourceforge.net schrieb in im Newsbeitrag:
3E837D4B.2080306@users.sourceforge.net…
Did you just not like the answers that you got when you asked this
question yesterday?
oh, yes - I like the answers I got yesterday.
I have wrote a new posting because I’m searching
for a solution like this or better.
···
–
i=0
arr.each {
a>
$tk_list.insert( i++, a.to_s )
}
–
The way I do this now in ruby is ugly.
daniel
Brian Candler B.Candler@pobox.com schrieb in im Newsbeitrag:
20030327220909.GA71406@uk.tiscali.com…
···
On Fri, Mar 28, 2003 at 06:54:58AM +0900, daniel wrote:
my code in ruby looks like this…
i=0
arr_stuff.each {a>
$tk_listbox_stuff.insert( i, a.to_s)
i += 1
}
–I really love the c++ style with
++i
or
i++Is there a smart way to do such things in ruby?
In the above example there’s an even smarter way:
arr_stuff.each_with_index { |a,i|
$tk_listbox_stuff.insert( i, a.to_s)
}Neat, huh
thx for this answer! - its great!
Sabby and Tabby sabbyxtabby@yahoo.com schrieb in im Newsbeitrag:
f5a79bf2.0303280429.14bc682e@posting.google.com…
···
“daniel” offstuff@aon.at wrote:
[…]
Avoiding the question of i++, a common idiom (if a google search for
“ruby tklistbox” is any indication) would be:arr_stuff.each { |a|
$tk_listbox_stuff.insert(‘end’, a.to_s)
}[…]
My code was only an example.
I’v searched for an ``alias´´ of the c++ code.
daniel
daniel offstuff@aon.at schrieb in im Newsbeitrag:
3e84b97e$0$20692$91cee783@newsreader02.highway.telekom.at…
Sabby and Tabby sabbyxtabby@yahoo.com schrieb in im Newsbeitrag:
f5a79bf2.0303280429.14bc682e@posting.google.com…[…]
Avoiding the question of i++, a common idiom (if a google search for
“ruby tklistbox” is any indication) would be:arr_stuff.each { |a|
$tk_listbox_stuff.insert(‘end’, a.to_s)
}[…]
additional…
$tk_listbox_stuff.insert(‘end’, a.to_s)
…is not a solve for my problem, because i need the idx for
extension things…
···
“daniel” offstuff@aon.at wrote: