using step backward ?

[Josselin]

I have an array myArray = ["22", "31", "56", "89", "47"]

I would like to produce a string like : "22#31#56#89>47<" where the
last item must be : >last_item<

case 1 item : ["22"] => ">22<"
case 2 items : ["22", "31"] => "22#>31<"
...
case n items : ["22", "31", "56", .........., "89", "47"] =>
"22#31#56#...........#89>47<"

as it's always the last items getting special treatment I thought
starting with " >"+myArray.last +"< " then
using 1.step(myArray.length-1, -1) do {..... put # after item } and
concatenate if myArray.length > 1
but I cannot get it right... I cannot get simple

tfyh

joss

 

[Olivier Renaud]

Le samedi 24 f=E9vrier 2007 19:00, Josselin a =E9crit=A0:

I have an array myArray =3D ["22", "31", "56", "89", "47"]

I would like to produce a string like : "22#31#56#89>47<" where the
last item must be : >last_item<

case 1 item : ["22"] =3D> ">22<"
case 2 items : ["22", "31"] =3D> "22#>31<"
..
case n items : ["22", "31", "56", .........., "89", "47"] =3D>
"22#31#56#...........#89>47<"

as it's always the last items getting special treatment I thought
starting with " >"+myArray.last +"< " then
using 1.step(myArray.length-1, -1) do {..... put # after item } and
concatenate if myArray.length > 1
but I cannot get it right... I cannot get simple

tfyh

joss

You may want to use Array#slice and Array#join to do that. And, as you said=
,=20
make a special treatment for the last element.

=2D-=20
Olivier Renaud

 

[Rob Biedenharn]

 

[Phrogz]

I have an array myArray = ["22", "31", "56", "89", "47"]

I would like to produce a string like : "22#31#56#89>47<" where the
last item must be : >last_item<

irb(main):001:0> myArray = ["22", "31", "56", "89", "47"]
=> ["22", "31", "56", "89", "47"]
irb(main):002:0> last = myArray.pop
=> "47"
irb(main):003:0> myArray.join('#')+">#{last}<"
=> "22#31#56#89>47<"

 

[Josselin]

I have an array myArray = ["22", "31", "56", "89", "47"]

I would like to produce a string like : "22#31#56#89>47<" where the
last item must be : >last_item<

irb(main):001:0> myArray = ["22", "31", "56", "89", "47"]
=> ["22", "31", "56", "89", "47"]
irb(main):002:0> last = myArray.pop
=> "47"
irb(main):003:0> myArray.join('#')+">#{last}<"
=> "22#31#56#89>47<"

thanks it runs well for 1or n > 2 items but not for 2 items

myArray = ["22", "31"]
=> ["22", "31"]
irb(main):002:0> last = myArray.pop
=> "31"
irb(main):003:0> myArray.join('#')+">#{last}<"
=> "22>31<"

I should get "22#>31<", the # must come after each item excepted the last..

 

[Raj Sahae]

I have an array myArray = ["22", "31", "56", "89", "47"]

I would like to produce a string like : "22#31#56#89>47<" where the
last item must be : >last_item<

Here you say that you want the second to last item to have no # after it,

I should get "22#>31<", the # must come after each item excepted the
last..

but here you say you want a # after it.
If you want no # sign, then Josselin's solution works.
If you want a # sign, just push that last item back on the array and
join it with #

myArray = ["22", "31", "56", "89", "47"]
myArray2 = ["22", "47"]
myArray3 = ["47"]

arrays = [myArray, myArray2, myArray3]

arrays.each{|array| puts array.push('>' + array.pop.to_s + '<').join('#')}

 

[Gary Wright]

I have an array myArray = ["22", "31", "56", "89", "47"]

I would like to produce a string like : "22#31#56#89>47<" where
the last item must be : >last_item<

case 1 item : ["22"] => ">22<"
case 2 items : ["22", "31"] => "22#>31<"
..
case n items : ["22", "31", "56", .........., "89", "47"] =>
"22#31#56#...........#89>47<"

I'm assuming you have a typo in that last case and want the
string to end with: "#89#>47<". It isn't clear how you would
want an empty list formatted but here is one possibility:

$ cat format.rb

def format(list)
list[0..-2].push(">#{list.last}<").join('#')
end

puts format([])
puts format(%w{22})
puts format(%w{22 31})
puts format(%w{22 31 56})

$ ruby format.rb

<
22<

22#>31<
22#31#>56<




Gary Wright

 

[Josselin]

I have an array myArray = ["22", "31", "56", "89", "47"]

I would like to produce a string like : "22#31#56#89>47<" where
the last item must be : >last_item<

case 1 item : ["22"] => ">22<"
case 2 items : ["22", "31"] => "22#>31<"
..
case n items : ["22", "31", "56", .........., "89", "47"] =>
"22#31#56#...........#89>47<"

I'm assuming you have a typo in that last case and want the
string to end with: "#89#>47<".

YES .. sorry

It isn't clear how you would
want an empty list formatted but here is one possibility:

$ cat format.rb

def format(list)
list[0..-2].push(">#{list.last}<").join('#')
end

puts format([])
puts format(%w{22})
puts format(%w{22 31})
puts format(%w{22 31 56})

$ ruby format.rb

<
22<

22#>31<
22#31#>56<

THAT's it......, very useful.. I put '#' and '>' '<' charcaters just to
make it simple.. but the objective is to insert html tags
to format correctly an output string...