Node.js: How to read the last non-empty line only of a txt file?

Question

Let's say I have a text file called example.exe that is like this:

Line 1 Stuff
Line 2 Stuff
(more lines here)
Line N (Last Line) Stuff
(empty line \n)

I want to be able to read the last line of the file only, so in this case "Line N (Last Line) Stuff" and store it inside a string. Also, I do know you can read line-by-line, but I want to reduce runtime and not have out of memory errors occur as the text file gets bigger. Anybody want to help me with this? I would prefer no this done using require('fs').

Answer 1

Assuming you store the content in a variable content you can split the content by lines...

var lines = content.split("\n")

...and check if the last line is empty...

var lastLine = lines[lines.length-1].length ? lines[lines.length-1] : lines[lines.length-2]