Ruby array to string conversion

ruby arrays string

309,596

Solution 1

I'll join the fun with:

['12','34','35','231'].join(', ')
# => 12, 34, 35, 231

EDIT:

"'#{['12','34','35','231'].join("', '")}'"
# => '12','34','35','231'

Some string interpolation to add the first and last single quote :P

Solution 2

> a = ['12','34','35','231']
> a.map { |i| "'" + i.to_s + "'" }.join(",")
=> "'12','34','35','231'"

Solution 3

try this code ['12','34','35','231']*","

will give you result "12,34,35,231"

I hope this is the result you, let me know

Solution 4

array.map{ |i|  %Q('#{i}') }.join(',')

Solution 5

string_arr.map(&:inspect).join(',') # or other separator

View more solutions

309,596

Sachin R

Fullstack Ninja/Lead: Ruby, Rails, JS, Angular, TDD/BDD, AWS Developer

Updated on February 09, 2022

Comments

Sachin R over 2 years

I have a ruby array like ['12','34','35','231'].

I want to convert it to a string like '12','34','35','231'.

How can I do that?
Mladen Jablanović over 13 years

Perhaps using "'#{i}'" instead.
oligan over 12 years

To quote Mladen, "Perhaps [use] "'#{i}'" instead."
djburdick over 12 years

don't think map is needed. join should do the trick. see below
Bernard over 11 years

That results in "12,34,35,231". It's missing the single quotes in the result.
corroded over 11 years

Okay added some string interpolation to add the first and last single quotes :P
Laf over 11 years

I think the OP needs to have the single quote as well.
Sean Cameron almost 11 years

This does not produce the correct output - the values needs to be wrapped in single quotes. If this was the desired output then string_arr.join(",") would be the better option.
avihil almost 11 years

Sean, you're wrong. Did you run the expression, at least once ??
Andrew Hodgkinson almost 11 years

It's still wrong. It results in double quotes around the array entries, not single quotes. Plus it relies upon an assumption about the format that "inspect()" prints data, which makes it fragile.
avihil over 10 years

['1','2','3'].map { |o| "\'#{o}\'" }.join(',')
zx1986 over 7 years

how to revert this?
corroded over 7 years

what do you mean revert @zx1986
zx1986 over 7 years

@corroded Sorry, I got it. JSON.parse("[12, 39, 100]") will return an array.
Claudio Floreani over 3 years

This is the right way to do it, should be the accepted answer.