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I want to split a string suppressing all null fields Command: ",1,2,,3,4,,".split(',') Result: ["", "1", "2", "", "3", "4", ""] Expected: ["1", "2", "3", "4"] How to do this? Edit Ok. Just to sum up all that good questions posted. What I wanted is that split method (or other method) didn't generate empty strings. Looks like it isn't possible. So, the solution is two step process: split string as usual, and then somehow delete empty strings from resulting array. The second part is exactly this question (and its duplicate ) So I would use ",1,2,,3,4,,".split(',').delete_if(&:empty?) The solution proposed by Nikita Rybak and by user229426 is to use reject method. According to docs reject returns a new array. While delete_if method is more efficient since I don't want a copy. Using select proposed by Mark Byers even more inefficient. steenslag proposed to replace commas with space and then use split by space: ",1,2,,3,4,,".gsub(',', ' ').split(' ') Actually, the documentation says that space is actually a white space. But results of "split(/\s/)" and "split(' ')" are not the same. Why's that? Mark Byers proposed another solution - just using regular expressions. Seems like this is what I need.

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