From: "mame (Yusuke Endoh)" Date: 2022-06-09T10:16:01+00:00 Subject: [ruby-core:108832] [Ruby master Bug#18768] Inconsistent behavior of IO, StringIO and String each_line methods when return paragraph and chomp: true passed Issue #18768 has been updated by mame (Yusuke Endoh). I have no strong opinion about this issue and am never against Jeremy's change, but I'm just curious. I thought that `each_line(..., chomp: true) {|s| ... }` was equal to `each_line(...) {|s| s = s.chomp; ... }`. In the above examples, StringIO's result (`["a\n", "b\n", "c"]`) was the simplest to me. @jeremyevans0 How did you think the IO behavior made the most sense? ---------------------------------------- Bug #18768: Inconsistent behavior of IO, StringIO and String each_line methods when return paragraph and chomp: true passed https://bugs.ruby-lang.org/issues/18768#change-97908 * Author: andrykonchin (Andrew Konchin) * Status: Open * Priority: Normal * ruby -v: 3.0.3 * Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN ---------------------------------------- In IO, StringIO and String methods that return lines (e.g. `each`, `each_line`, `gets`, `readline`, `readlines`) behave in a different way when the following parameters are passed - separator is `""` and - `chomp` is `true`. They truncate the new line characters between paragraphs and the trailing one differently: ```ruby "a\n\nb\n\nc\n".each_line("", chomp: true).to_a #=> ["a\n", "b\n", "c\n"] StringIO.new("a\n\nb\n\nc\n").each_line("", chomp: true).to_a #=> ["a\n", "b\n", "c"] File.open('chomp.txt').each_line("", chomp: true).to_a #=> ["a", "b", "c\n"] ``` The text file content is the same: ```ruby File.read('chomp.txt') #=> "a\n\nb\n\nc\n" ``` Expected behavior - they return the same result. -- https://bugs.ruby-lang.org/ Unsubscribe: