How in node to split string by newline ('\n')?

Question

How in node to split string by newline (\'\\n\') ? I have simple string like var a = \"test.js\\nagain.js\" and I need to get [\"test.js\", \"again.js\"]<

Answer 1

It looks like regex /\r\n|\r|\n/ handles CR, LF, and CRLF line endings, their mixed sequences, and keeps all the empty lines inbetween. Try that!

function splitLines(t) { return t.split(/\r\n|\r|\n/); }

// single newlines
splitLines("AAA\rBBB\nCCC\r\nDDD");
// double newlines
splitLines("EEE\r\rFFF\n\nGGG\r\n\r\nHHH");
// mixed sequences
splitLines("III\n\r\nJJJ\r\r\nKKK\r\n\nLLL\r\n\rMMM");

You should get these arrays as a result:

[ "AAA", "BBB", "CCC", "DDD" ]
[ "EEE", "", "FFF", "", "GGG", "", "HHH" ]
[ "III", "", "JJJ", "", "KKK", "", "LLL", "", "MMM" ]

You can also teach that regex to recognize other legit Unicode line terminators by adding |\xHH or |\uHHHH parts, where H's are hexadecimal digits of the additional terminator character codepoint (as seen in Wikipedia article as U+HHHH).