# Access array in ruby loop
**URL:** https://discuss.elastic.co/t/access-array-in-ruby-loop/178028
**Category:** Logstash
**Created:** [April 23, 2019, 11:33am UTC](https://discuss.elastic.co/t/access-array-in-ruby-loop/178028 "2019-04-23T11:33:54Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@manunc](https://discuss.elastic.co/u/manunc)
#### Post date: [April 23, 2019, 11:33am UTC](https://discuss.elastic.co/t/access-array-in-ruby-loop/178028/1 "2019-04-23T11:33:54Z")
Hello,
I would like to create new fields based on an array coming from a splitted field and associate the value of each fields
```
dtab = data.split(/(\w{20})(\w{20})(\w{20})(\w{20})(\w{20})(\w{20})(\w{20})(\w{20})(\w{20})(\w{20})(\w{20})(\w{20})(\w{20})(\w{20})(\w{20})(\w{20})\w{2}\w{2}\w{2}/)
dtab.shift
event.set('[metadata][dtab]', dtab)
event.get('[metadata][dtab]').each_with_index do |hash, index|
event.set( '[tire][' +[index]+ ']', hash[value])
end
```
Source:
"metadata": {
"dtab": [
"ff000000ffff807f00ff",
"ff000000ffff807f00ff",
"ff000000ffff807f00ff",
"ff000000ffff807f00ff",
"ff000000ffff807f00ff",
"ff000000ffff807f00ff",
"ff000000ffff807f00ff",
"ff000000ffff807f00ff",
"ff000000ffff807f00ff",
"ff000000ffff807f00ff",
"ff000000ffff807f00ff",
"ff000000ffff807f00ff",
"ff000000ffff807f00ff",
"ff000000ffff807f00ff",
"ff000000ffff807f00ff",
"ff000000ffff807f00ff"
]
}
Result:
[tire][1] = value1 (ff000000ffff807f00ff)
[tire][2] = value2 (ff000000ffff807f00ff)
...
[tire][16] = value16 (ff000000ffff807f00ff)
BR
---
### Author:  [@Badger](https://discuss.elastic.co/u/Badger)
#### Post date: [April 23, 2019, 12:18pm UTC](https://discuss.elastic.co/t/access-array-in-ruby-loop/178028/2 "2019-04-23T12:18:57Z")
What is the question?
---
### Author:  [@manunc](https://discuss.elastic.co/u/manunc)
#### Post date: [April 23, 2019, 7:39pm UTC](https://discuss.elastic.co/t/access-array-in-ruby-loop/178028/3 "2019-04-23T19:39:27Z")
Sorry,
Fromthe [metadata][dtab] field I need to create fields:
[tire][1] = value1 (ff000000ffff807f00ff)
[tire][2] = value2 (ff000000ffff807f00ff)
...
[tire][16] = value16 (ff000000ffff807f00ff)
by using a ruby filter with a loop but I dont succeed to get index and value.
Maybe I have to use only .each as there is no index in this case and create index by myself.
---
### Author:  [@Badger](https://discuss.elastic.co/u/Badger)
#### Post date: [April 23, 2019, 8:36pm UTC](https://discuss.elastic.co/t/access-array-in-ruby-loop/178028/4 "2019-04-23T20:36:19Z")
Still not entirely clear. If you want
```
"tire" => {
"11" => "ff000000ffff807f00ff",
"12" => "ff000000ffff807f00ff",
"13" => "ff000000ffff807f00ff",
"14" => "ff000000ffff807f00ff",
"15" => "ff000000ffff807f00ff",
"0" => "ff000000ffff807f00ff",
"1" => "ff000000ffff807f00ff",
"2" => "ff000000ffff807f00ff",
"3" => "ff000000ffff807f00ff",
"4" => "ff000000ffff807f00ff",
"5" => "ff000000ffff807f00ff",
"6" => "ff000000ffff807f00ff",
"7" => "ff000000ffff807f00ff",
"8" => "ff000000ffff807f00ff",
"9" => "ff000000ffff807f00ff",
"10" => "ff000000ffff807f00ff"
}
```
then you can use
```
code => '
event.get("[metadata][dtab]").each_with_index do |hash, index|
event.set("[tire][#{index}]", hash)
end
'
```
String interpolation only works inside double quotes, which is why I almost always use single quotes to surround the code.
---
### Author:  [@manunc](https://discuss.elastic.co/u/manunc)
#### Post date: [April 23, 2019, 8:55pm UTC](https://discuss.elastic.co/t/access-array-in-ruby-loop/178028/5 "2019-04-23T20:55:02Z")
That is what I need I guess.
I was surrounded the code using double quote and wondering how to use double quote inside in order to use #{variable}. I will try.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [May 21, 2019, 8:55pm UTC](https://discuss.elastic.co/t/access-array-in-ruby-loop/178028/6 "2019-05-21T20:55:08Z")
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