Convert String into Array

Question

This is my String :

 "[[question1, answer1],[queston2,ans2]]"

How can I convert into Array like

[[question1, answer1],[queston2,ans2]]

Rajdeep Singh · Accepted Answer · 2014-04-15 09:08:32Z

3

You can do this easily by using yaml

require 'yaml'

str = "[[question1, answer1],[queston2,ans2]]"

# transform your string in a valid YAML-String
str.gsub!(/(\,)(\S)/, "\\1 \\2")

YAML::load(str)
# => [[question1, answer1],[queston2,ans2]]

or

YAML.load(str)

edited Apr 15, 2014 at 9:08

answered Apr 15, 2014 at 7:44

Rajdeep Singh

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1 Comment

Alok Anand Over a year ago

There is no need of doing gsub here, as you would get an array with string elements only. YAML.load(str) is enough here.

Alok Anand · Accepted Answer · 2014-04-15 08:27:11Z

With str = "[[question1, answer1],[queston2,ans2]]", it not possible to get output like

[[question1, answer1],[queston2,ans2]]. We can get output with string elements like [["question1", "answer1"], ["queston2", "ans2"]] by doing just require 'yaml' and YAML.load str.

And if you have identifiers question1, answer1, queston2 and ans2 then you can just get an array of corresponding values for these identifiers by using eval str.

Considering:--

question1 = "Which language is the best language?"
answer1 = "Ruby"
queston2 = "Which framework is the best framework?"
ans2 = "Rails 4.1"

We will get an array like following:--

eval str
=> [["Which language is the best language?", "Ruby"], 
     ["Which framework is the best framework?", "Rails 4.1"]]

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