Arrays

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From: Rajkumar Surabhi on 25 Mar 2010 00:27

---

Hi all,

i have an array contains no of elements. i want to concatinate 91 before
every elemnt of array. example

i have
A= [234,456,raju] like this
i want the out put arry tobe A=[91234,91456,91raju] like thissss

i want to add 91 before every element

how to do this
--
Posted via http://www.ruby-forum.com/.

From: Mario Antonetti on 25 Mar 2010 00:38

---

[Note: parts of this message were removed to make it a legal post.]

On Wed, Mar 24, 2010 at 10:27 PM, Rajkumar Surabhi
<mailtorajuit(a)gmail.com>wrote:

> Hi all,
>
> i have an array contains no of elements. i want to concatinate 91 before
> every elemnt of array. example
>
> i have
> A= [234,456,raju] like this
> i want the out put arry tobe A=[91234,91456,91raju] like thissss
>
> i want to add 91 before every element
>
> how to do this
> --
> Posted via http://www.ruby-forum.com/.
>
>
the assignment of the variable should look more like this:
-------------------------------------------------------------
a = ["234","456","raju"]
-------------------------------------------------------------
because otherwise raju is a variable, which wouldn't allow you to append 91
to the beginning of it.

Try this then:
--------------------------------------------------------
array.collect! do |element|
"91" + element.to_s
end
--------------------------------------------------------

Mario

From: Brandon Jones on 25 Mar 2010 01:36

---

And the short form

> a = ["123", "456", "raju"]
> a.map!{|x|"91#{x}"} # => ["91123", "91456", "91raju"]
--
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From: Robert Klemme on 25 Mar 2010 08:20

---

2010/3/25 Brandon Jones <brandon.g.jones(a)gmail.com>:
> And the short form
>
>> a = ["123", "456", "raju"]
>> a.map!{|x|"91#{x}"} # => ["91123", "91456", "91raju"]

Even shorter (6 chars if I'm not mistaken):

a = %w{123 456 raju}
a.map!{|x|"91#{x}"}

;-)

Kind regards

robert

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

From: Brandon Jones on 25 Mar 2010 17:53

---

Robert Klemme wrote:
> Even shorter (6 chars if I'm not mistaken):
>
> a = %w{123 456 raju}
> a.map!{|x|"91#{x}"}
>
> ;-)
>
> Kind regards
>
> robert

oh yeah?!? well take this

%w(123 456 raju).map{|x|"91#{x}"}

not exactly the same, as there is no persistent variable, but it is a
bit shorter
--
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