2016年7月21日木曜日 4時45分03秒 UTC+9 Bram Moolenaar:
> Ozaki Kiichi wrote:
>
> > I propose new conversion specifier '%v' (and '%V') of printf();
> > inspired by golang.
> >
> > This spec takes a value of any type and converts into string by
> > echo_string().
> >
> > example:
> >
> > " list
> > :echo printf('%v', [0, 1, 2, 3])
> > [0, 1, 2, 3]
> >
> > " dict
> > :echo printf('%v', {'str' : 'abcdef', 'num' : 123, 'pt' :
> > function('printf', ['%%'])})
> > {'str': 'abcdef', 'num': 123, 'pt': function('printf', ['%%'])}
> >
> > " funcref
> > :echo printf('%v', function('str2nr'))
> > str2nr
> >
> >
> > '%V' is simular with '%S'.
> >
> > patch:
> >
> > https://gist.github.com/ichizok/c1ad7759d7a0a0734fb02f5a4d37445c
>
>
> So, the same would be done with using "%s" and string() on the value?
>
> :echo printf('%s', string([0, 1, 2, 3]))
> [0, 1, 2, 3]
>
> I suppose golang doesn't have a string() function.
>
> An even simpler way is to do what Swift does:
>
> "lead \(expression) tail"
>
> With the example above:
> "\([0, 1, 2, 3])"
>
> I'm using this in Zimbu, works quite well.
>
> --
> Q: How does a UNIX Guru pick up a girl?
> A: look; grep; which; eval; nice; uname; talk; date;
>
> /// Bram Moolenaar -- [email protected] -- http://www.Moolenaar.net \\\
> /// sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
> \\\ an exciting new programming language -- http://www.Zimbu.org ///
> \\\ help me help AIDS victims -- http://ICCF-Holland.org ///
When converting multiple values of any types (e.g. in debugging),
it is rather bothersome to use string() to each values:
:echo printf('foo: %s, bar: %s, baz: %s, qux: %s', string(foo), string(bar),
string(baz), string(qux))
and, when a argument is string, string() is redundant.
Thus, simply:
:echo printf('foo: %v, bar: %v, baz: %v, qux: %v', foo, bar, baz, qux)
It is easy to reuse format string.
let fmt = '[%v] [%v] [%v]'
...
echo printf(fmt, x1, x2, x3)
...
echo printf(fmt, y1, y2, y3)
Thank you.
- Ozaki Kiichi
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