Quoting Lucio (2018-10-04 23:19:48)
> On Tuesday, 2 October 2018 15:21:08 UTC+2, Eric Raymond wrote:
>
> Is promised in the thread on pytogo, I have blogged on the general
> topic of rule-swarm attacks in the domain of language transformation.
> [1]http://esr.ibiblio.org/?p=8153
>
> I'm no pragmatist, I bow to ESR for shining that light. But here's my
> own, tiny contribution to sledge-hammering human-readable dates into
> internal Go format:
> // Function ParseDate() attempts all known legal date formats
> 79� � //
> 80� � // More formats can be added as the need arises. It would not
> be t
> he
> 81� � // first time.
> 82� � //
> 83� � func ParseDate(s string) (d time.Time, err error) {
> 84� � s = strings.Trim(s, " \t")
> 85� � if d, err = time.Parse("Mon, 02 Jan 2006 15:04:05 -0700
> (MST)",
> s); err == nil {
> 86� � return d, nil
> 87� � }
> 88� � if d, err = time.Parse("Mon, 02 Jan 2006 15:04:05 -0700", s);
> er
> r == nil {
> 89� � return d, nil
> 90� � }
> 91� � if d, err = time.Parse("Mon, 2 Jan 2006 15:04:05 -0700
> (MST)", s
> ); err == nil {
> 92� � return d, nil
> 93� � }
> 94� � if d, err = time.Parse("Mon, 2 Jan 2006 15:04:05 -0700", s);
> err
> == nil {
> 95� � return d, nil
> 96� � }
> 97� � if d, err = time.Parse("02 Jan 2006 15:04:05 -0700", s); err
> ==
> nil {
> 98� � return d, nil
> 99� � }
> 100� � if d, err = time.Parse("2 Jan 2006 15:04:05 -0700", s); err
> == n
> il {
> 101� � return d, nil
> 102� � }
> 103� � return d, err
> 104� � }
> 105� �
> 106� �
>
> Not pretty, I grant. This one was in the context of email headers
> (RFC-822 and later) parsing, I just haven't read enough Go code to know
> if there is a better way. The curious thing is that in my
> life-before-Go, I have frequently wanted something like this, but it
> took what I presume (perhaps unfairly) to be Rob Pike's date parsing to
> give it shape.
> Lucio.
The low-hanging fruit in the "pretty" department I see is:
formats := []string{
"Mon, 02 Jan 2006 15:04:05 -0700 (MST)",
"Mon, 02 Jan 2006 15:04:05 -0700",
...
}
for _, format := range formats {
if d, err = time.Parse(format), s); err = nil {
return d, nil
}
}
--
You received this message because you are subscribed to the Google Groups
"golang-nuts" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to golang-nuts+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
