On Friday, August 22, 2014 12:05:33 PM UTC+12, mattn wrote:
> > Bug in sort() function?
>
> See :help sort()
>
> > The sort is stable, items which compare equal (as number or as...
There is indeed a bug in sort(). The stability of the sort is not relevant.
I haven't been following the thread too closely, but became interested on
seeing Andy's report of
:echo sort(['3 0', '3 0 1'])
['3 0 1', '3 0']
I tried
:echo sort(['foo bar','foo'])
['foo bar', 'foo']
but
:echo sort(['foobar','foo'])
['foo', 'foobar']
The space makes a difference, because it sorts less than a single quote. Try
:echo sort(['foo','foo&bar','foo(bar'])
['foo&bar', 'foo', 'foo(bar']
Looking in eval.c, to compare list items tv2string is called to stringify each
item. tv2string calls string_quote, which puts single quotes around each
string (and doubles any single quotes in the string). This effectively adds a
single quote to the end of each string, and if it's being compared to a string
that has something comparing less than a quote, it sorts ahead.
I don't know why string_quote is called; it clearly is not useful for this
purpose, but may be needed for another.
Regards, John Little
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