Using .split on a string in an array

Question

For an input like 12,34,56;78,91;50,60;

I want to split the string by semi-colon delimit and then those strings split by comma delimit

ex:

puts "Input: "
input = gets.chomp
s_array = input.split(";")
for i in 0..s_array.size
    puts s_array[i].split(",")
end

It will successfully print with puts but after I get an error

undefined method 'split' for nil:NilClass <NoMethodError>

Whats the reason for this error?

This is not what you've asked for, but you might find it of interest: "12,34,56;78,91;50,60;".split(/[,;]/) #=> ["12","34","56","78","91","50","60"]. — Cary Swoveland
– Cary Swoveland, Commented Feb 18, 2014 at 3:21

S. A. · Accepted Answer · 2014-02-18 02:50:36Z

2

Change .. for ...

for i in 0...s_array.size

Creating a range with .. is inclusive, while ... is not, e.g.

1..5  # => 1,2,3,4,5
1...5 # => 1,2,3,4

So the variable i overflows the array, in your case if the array size is 5, array_s[5] will be nill.

answered Feb 18, 2014 at 2:50

S. A.

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1 Comment

zeantsoi Over a year ago

@user1763861, you should accept this question as correct, then.

bjhaid · Accepted Answer · 2014-02-18 03:09:03Z

2

A more rubyish approach is:

input.split(";").each { |x| puts x.split (",") }

You should use Array#each, it is not rubyish to use for and there are very few cases where for loop is required in place of each in ruby and the for keyword delegates to each even when used.

answered Feb 18, 2014 at 3:09

bjhaid

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