Ruby execute shell command and get array

Question

I'm getting a string of few lines from the shell. Is it possible to get an Array with each line being its element?

Jorge Israel Peña · Accepted Answer · 2013-03-26 10:35:17Z

9

Sure, depending on the output you could just split it. For example:

lines = `ls`.split

This solution is independent of the method you're using to execute the program. As long as you get the complete string you can split it.

answered Mar 26, 2013 at 10:35

Jorge Israel Peña

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Howard Abrams · Accepted Answer · 2015-03-16 18:38:51Z

6

The original question was splitting on lines, and the split function, by default, splits on white space. While that may be sufficient, you may want to pass in a regular expression, as in:

`ls -l`.split(/$/)

Which returns each line in a separate element in the array. However, it doesn't get rid of the initial carriage return or line feed. For that, you will want to use the map function to iterate over the array and apply strip to each, as in:

`ls -l`.split(/$/).map(&:strip)

answered Mar 16, 2015 at 18:38

Howard Abrams

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2 Comments

user180574 Over a year ago

Your method is not as good as just using "split". I test with sudo ifquery --list | grep -v lo. Yours return ["eth0", "eth1", ""], the last one is annoying.

Ana María Martínez Gómez Over a year ago

but split doesn't work if you have '\n' in your output (as part of the name for example)

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