# An array to string in different lines

**URL:** <https://www.ruby-forum.com/t/an-array-to-string-in-different-lines/167280>\
**Category:** Ruby\
**Created:** [May 6, 2009, 11:25am UTC](https://www.ruby-forum.com/t/an-array-to-string-in-different-lines/167280 "2009-05-06T11:25:21Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![sijo](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/da6949/32.png) [@sijo](https://www.ruby-forum.com/u/sijo)\
**Post date:** [May 6, 2009, 11:25am UTC](https://www.ruby-forum.com/t/an-array-to-string-in-different-lines/167280/1 "2009-05-06T11:25:21Z")

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Hi  
I am collecting errors like object.errors.on(:field) So some times i  
get it like an array  
[“error1\_message”,“error2\_message”] or  
“error1\_message” a string

So how can i format this in more than one line if its an array(or  
either case)  
example in first case how can i get it like  
“error1\_message”  
“error2\_message”

Thanks in advance  
Sijo

---

<div class="post-metadata">

**Author:** ![sijo](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/da6949/32.png) [@sijo](https://www.ruby-forum.com/u/sijo)\
**Post date:** [May 6, 2009, 12:30pm UTC](https://www.ruby-forum.com/t/an-array-to-string-in-different-lines/167280/2 "2009-05-06T12:30:44Z")

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On Wed, May 6, 2009 at 11:25 AM, Sijo Kg [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> “error2\_message”  
> A way that works for both cases (array of strings and string):

irb(main):002:0\> s = [“a”, “b”]  
=\> [“a”, “b”]  
irb(main):003:0\> puts [\*s].join(“\n”)  
a  
b  
=\> nil  
irb(main):004:0\> s = “a”  
=\> “a”  
irb(main):005:0\> puts [\*s].join(“\n”)  
a

Another one:  
irb(main):004:0\> s = “a”  
=\> “a”  
irb(main):006:0\> puts [s].flatten.join(“\n”)  
a  
=\> nil  
irb(main):007:0\> s = [“a”, “b”]  
=\> [“a”, “b”]  
irb(main):008:0\> puts [s].flatten.join(“\n”)  
a  
b

Hope this helps,

Jesus.