I send an array from rest client and received it like this: "[1,2,3,4,5]"
Now I just want to convert it into Array without using Ruby's eval method. Any Ruby's default method that we could use for this?
"[1,2,3,4,5]" => [1,2,3,4,5]
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Does the API use a specific format like JSON or YAML?Stefan– Stefan2016-01-26 07:51:04 +00:00Commented Jan 26, 2016 at 7:51
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...because if not, consider adopting one, you need a serialization format anyway.D-side– D-side2016-01-26 08:18:33 +00:00Commented Jan 26, 2016 at 8:18
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1API uses JOSN formatGhulam Jilani– Ghulam Jilani2016-01-26 08:26:46 +00:00Commented Jan 26, 2016 at 8:26
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3@GhulamJilani you should strongly consider using Ruby's JSON library as shown in Cary Swoveland's answer below.Stefan– Stefan2016-01-26 09:08:03 +00:00Commented Jan 26, 2016 at 9:08
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3 Answers
require 'json'
JSON.parse "[1,2,3,4,5]"
#=> [1, 2, 3, 4, 5]
JSON.parse "[[1,2],3,4]"
#=> [[1, 2], 3, 4]
Perhaps this?
s.tr('[]', '').split(',').map(&:to_i)
4 Comments
Terra Ashley
Caution: This approach effectively flattens multidimensional arrays.
Vishwas Nahar
With using
'["12", "45"]'.tr('[]','').map(&:to_i) it return error : undefined method map
Ho Man
tbh, at this point, you should just use
JSON.parse lol. But if you reallyyyyy wanted, '["12", "45"]'.tr('["]','').split(',')
stwr667
2nd caution: If you want it to raise an
ArgumentError for non-integers like '2.2' or bad data like '2sdf' then replace the .map(&:to_i) at the end with .map { |x| Integer(x) }. (Or .map { |x| Float(x) } if you want floats).If you want to avoid eval, yet another way:
"[1,2,3,4,5]".scan(/\d+/).map(&:to_i) #assuming you have integer Array as String
#=> [1, 2, 3, 4, 5]
3 Comments
Vishwas Nahar
Using this
'[88,89,100]'.scan(/\d/) returns ["8", "8", "8", "9", "1", "0", "0"]
shivam
@VishwasNahar tweaking pattern to
\d+ will solve this. I have updated my answer. Thanksshivam
PS: you should definitely use
JSON.parse @VishwasNahar