Delete blank lines from a text file

[G Mills]

Does anyone know if it is possible to remove blank lines from a text file?

I am trying to remove entries from a hosts file and can delete the entry but it leaves a blank line. I would like to remove the blank lines to keep the hosts file tidy - any ideas?

[Worm]

I didn't test this code, but it should work, or at least with minimal changes

--read the host file into a table
tblHosts = TextFile.ReadToTable(_SystemFolder.."\\Drivers\\etc\\hosts")
--if the table isn't empty
if Table.Count(tbHosts) > 0 then
	--start at the end of the file and loop through
	--to remove all blank lines
	for n=Table.Count(tblHosts), 1, -1 do
		--trim spaces
		sTemp = String.TrimLeft(tblHosts, " ")
		if sTemp == "\r\n" then
			Table.Remove(tblHosts, n)
		end
	end
end

[G Mills]

Thanks for having a look at this but it doesn't seem to work. It fails at runtime with a message of "Argument 1 must be of type string".

I think this is on the sTemp = String.TrimLeft(tblHosts, " ") line as tblhosts should be a string.

Tried a few things but still stuck I'm afraid, any other ideas would be greatly appreciated.

[Brett]

Make it:

sTemp = String.TrimLeft(tblHosts[n], " ")

[Worm]

Also:

if Table.Count(tbHosts) > 0 then

should be

if Table.Count(tblHosts) > 0 then

<SelfReminder>Test Code before Posting</SelfReminder>

[Worm]

Okay, I actually tested this one

--read the host file into a table
tblHosts = TextFile.ReadToTable(_SystemFolder.."\\Drivers\\etc\\hosts")
--if the table isn't empty
if Table.Count(tblHosts) > 0 then
	--start at the end of the file and loop through
	--to remove all blank lines
	for n=Table.Count(tblHosts), 1, -1 do
		--trim spaces
		sTemp = String.TrimLeft(tblHosts[n], " ")
		if sTemp == "" then
			Table.Remove(tblHosts, n)
		end
	end
end
	
TextFile.WriteFromTable(_SystemFolder.."\\Drivers\\etc\\hosts", tblHosts, false)

[Absynthe]

<SelfReminder>Test Code before Posting</SelfReminder>

Air code will get you every time.

That said it was an elegant solution

[G Mills]

Sure is, tested this and it worked a treat! Thanks alot for all your help.

[Worm]

Air code will get you every time.

Funny. My Air Guitar is so much better than the real deal, why not my code? Another of life's mysteries I guess.

[Corey]

Air guitar is more noble than air coding by a factor of three. Just an observation...