Re: Trimming newlines from calls to system()

On Friday, February 14, 2014 11:00:30 PM UTC+4, Benjamin Klein wrote:
> When I echom something from the command line using system():
>
>     :echom system("echo \"testing\"")
>
> I get a ^@ (null) at the end of the result:
>
>     testing^@
> If I instead use echo, which doesn't translate unprintable characters but displays them:
>
>     :echo system("echo \"testing\")
>
> I get the result of the command line command with an added newline:
>
>     testing
>
> This of course normally makes sense at the command line, but when I'm returning output taken from the command line as a Vim message I don't want an unnecessary newline. I can eliminate it by returning the first item in a List made from split() used on the return value from system() with "\n" as the pattern (or perhaps by substitute-ing newlines with ''), but is there a simpler way to do this?

Usually if you know for sure that command will output trailing newline (which you do in something like 90% of cases) you just use `system()[:-2]`. `substitute(system(), "\n*$", '', '')` if you want to trim any amount of newlines (like `str.rstrip('\n')` in python).

>
> Thanks!

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