Tony Esposito wrote:
On Mon, 8/3/10, John W. Krahn <jwkr...@shaw.ca> wrote:
Tony Esposito wrote:
Does tr/'\n'/' '/
Replace every ' with ' and every "\n" with " " and every ' with '.
Should probably just be tr/\n/ /.
do the same as tr/'\n'/' '/g?
I assume you mean s/'\n'/' '/g because /g is not a valid option for
tr///. That will replace the string "'\n'" with the string "' '"
globally but I assume you meant s/\n/ /g.
( replace newline with space )
If so, is one preferred over the other?
tr/// is usually more efficient (faster) than s///g. Unless you
really meant to use the string "'\n'" because tr/// cannot do strings,
just characters.
Sorry about the syntax errors ... Yes, just want to replace all
newline characters with a space and since tr does not have g (global)
'option' I was thinking that s/\n/ /g is actually better. Or does tr
do a global translate by default?
Yes, tr/// operates on the entire string. There is no way to limit it
to only part of the string. tr/// transliterates characters on the left
to characters on the right.
s/// uses pattern matching (regular expressions) and does interpolation
just like any double quoted string so it has to do a lot more work than
tr///.
So, if you are only interested in manipulating characters then tr/// may
be all that you need.
John
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