Extract last string from a sentence using node.js

Question

I am trying to extract last string from a sentence.

var output is

[info] Sikuli vision engine loaded.
[info] Windows utilities loaded.
[info] VDictProxy loaded.
The arguments are:  ['E:/automation.sikuli/automation.py', '{"command":"sel_medi
a","value":"5X7_on_letter"},{"command":"sel_printer","value":"cutepdf"},{"comman
d":"sel_tray","value":"formsource"},{"command":"print","value":"print"}']
5X7_on_letter not Selected

From this How can I get the last 5X7_on_letter not Selected only?

output.split('\n'); and stackoverflow.com/questions/3216013/… — brandonscript
– brandonscript, Commented Apr 4, 2014 at 8:35

raina77ow · Accepted Answer · 2014-04-04 09:32:30Z

2

One possible approach:

var lastLine = output.match(/.*$/)[0];

Demo, regex101 playground.

Explanation: /.*$/ pattern matches all the symbols preceding the end of the string except newline ones. This will essentially cover only the last line of that string.

A regex-free alternative is using lastIndexOf to get the position of the last EOL, then taking the rest of the string. Like this:

var lastLine = output.slice(output.lastIndexOf('\n') + 1);

edited Apr 4, 2014 at 9:32

answered Apr 4, 2014 at 8:38

raina77ow

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6 Comments

Psl Over a year ago

am not getting using this

raina77ow Over a year ago

Sorry, what? You don't have the expected result, or you don't understand how it works?

Psl Over a year ago

actually that is not working ,-...the output string is the response.but using ur code it is not working i dont know

raina77ow Over a year ago

Where's this string (value of output) taken from? What happens if you just output.match(/not Selected/)[0] instead? And what exactly does 'not working' mean - do you get an error, an empty string, or the whole string in lastLine?

Brett Over a year ago

You shouldn't have quotes around your regex. var lastLine = output.match(/.*$/)[0];

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