Re: string function: definition of a function

[Petr M. <mi...@ph...>]

> > seems we don't have "string index" or "string split" functions.
> 
> We do. It is called strstrt(haystack,needle):
> 
> gnuplot> show var GPFUN
>         GPFUN_f = "f(a,b) = a**2 + sqrt(b*a)"
> 
> gnuplot> print strstrt(GPFUN_f,"=")
> 	8
> gnuplot> print GPFUN_f[ strstrt(GPFUN_f,"=") : * ]

Interesting, I have never used this.

How can I get the "reversed" version of it? Just today I needed to extract 
the last part of the directory, e.g. from
	/tmp/bla/now
I needed to get "now". Finally I've got it by calling shall's `basename` but 
the reversed version of "strstrt" would help a lot.

Further I have noticed `pwd` command from shell is needed to set a variable 
for the current working directory because
	gnuplot> pwd
just prints it to screen, but I cannot do
	a=pwd
or	a=eval pwd

Would an automatic variable GPVAL_PWD be the only chance for a portable 
solution?

---
PM