How do I convert a comma-separated string into an array?

Use the split method to do it:

"one,two,three,four".split(',')# ["one","two","three","four"]

If you want to ignore leading / trailing whitespace use:

"one , two , three , four".split(/\s*,\s*/)# ["one", "two", "three", "four"]

If you want to parse multiple lines (i.e. a CSV file) into separate arrays:

require "csv"CSV.parse("one,two\nthree,four")# [["one","two"],["three","four"]]

ruby arrays string csv

require 'csv'CSV.parse_line('one,two,three,four') #=> ["one", "two", "three", "four"]

ruby arrays string csv

>> "one,two,three,four".split ","=> ["one", "two", "three", "four"]

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