Need to help to get data from bellow syntax

ruby-talk
1

Hi

I need a help to read data from bellow syntax

[{:name=>"value1"}, {:name=>"Value2"}]

so its wiill be

value1
valu2

but dont understand how to get that.
any help and explanation will be really helpful
Thanks

···

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

2

Something like this, maybe:

    bellow_syntax = [{:name=>"value1"}, {:name=>"Value2"}]
    puts bellow_syntax.map{ |hash|
      name = hash[:name]
      name =~ /^V(alu)e(2)$/ ? "v#$1#$2" : name
    }

... but that's mean.

[...] means an array, so you can use .each to iterate over its members.
{...} means a hash, so you can use foo[bar] to access its members
:foo means a symbol, which is just a ruby datatype

    ary = [{:name=>"value1"}, {:name=>"value2"}]
    ary.each do |hsh|
      # hsh == {:name=>"valueX"}
      # hsh[:name] == "valueX"
      puts hsh[:name]
    end

···

On 19 July 2013 23:50, Fosiul Alam <lists@ruby-forum.com> wrote:

Hi

I need a help to read data from bellow syntax

[{:name=>"value1"}, {:name=>"Value2"}]

so its wiill be

value1
valu2

but dont understand how to get that.
any help and explanation will be really helpful
Thanks

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

--
  Matthew Kerwin, B.Sc (CompSci) (Hons)
  http://matthew.kerwin.net.au/

3

The [ and ] indicate a list. So we need to loop over the list

bellow_syntax = [{:name=>"value1"}, {:name=>"Value2"}]

bellow_syntax.each do |item|
  p item
end

This prints out the items in the list as shown bellow

{:name=>"value1"}
{:name=>"Value2"}

The { and } indicate a hash. We want the value of the :name key so we do
this:

bellow_syntax.each do |item|
  p item[:name]
end

and this prints out

"value1"
"Value2"

In a more Rubyish way we can do this

p bellow_syntax.map{|x| x[:name]}

which returns a list of the values

["value1", "Value2"]

If you don't know what list and hashes are, and the fact that you asked
this question means that you don't, please follow the various tutorials
that get mentioned in this list on an almost daily basis. Once you have
done that the final answer I gave you will make sense.