split and join

split and join

String#split(separator) breaks a string into an array of substrings wherever the separator occurs, and Array#join(separator) does the reverse, combining array elements back into a single string. These are commonly paired when parsing and reconstructing delimited text like CSV data. Calling split with no arguments splits on any whitespace.

Note: text.split with no argument splits on any run of whitespace, which is handy for tokenizing plain sentences.

Example: split and join

csv_line = "apple,banana,cherry"

parts = csv_line.split(",")
puts parts.inspect

joined = parts.join(" | ")
puts joined