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time: want more control over time.Format #9547

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ddietterich opened this issue Jan 9, 2015 · 6 comments
Closed

time: want more control over time.Format #9547

ddietterich opened this issue Jan 9, 2015 · 6 comments

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@ddietterich
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@ddietterich ddietterich commented Jan 9, 2015

Using go version go1.3.3 linux/amd64

func main() {
        t := time.Now()
        fmt.Printf("time: %v; format: %s\n", t, t.Format("20080101 10:00:00.000"))
}

Prints:

time: 2015-01-09 17:06:02.033307544 +0000 UTC; format: 90080101 10:00:00.033

I want YYYYMMDD, but time.Format is only layout by example, so it cannot know what digits mean year, month, day. I have to do it by hand.

@bradfitz
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@bradfitz bradfitz commented Jan 9, 2015

Use the reference time. This is explained in the docs: http://golang.org/pkg/time/#pkg-constants

@bradfitz bradfitz closed this Jan 9, 2015
@ddietterich
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@ddietterich ddietterich commented Jan 9, 2015

I read that documentation. I find nothing there that lets me distinguish years, months and days in a concatenated string. It just will not do what I want it to do.

@ddietterich
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@ddietterich ddietterich commented Jan 9, 2015

@cespare Maybe there is a fix between 1.3.3 and 1.4? You can see that I did not get the correct year in my example.

@cespare
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@cespare cespare commented Jan 9, 2015

@ddietterich as @bradfitz said, you need to use the reference time, not some other time of your choosing. (Examine carefully the difference between your code and mine.)

@ddietterich
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@ddietterich ddietterich commented Jan 9, 2015

OK, I get it.
I find it entirely obscure and won't use it, but I cannot complain that it won't do what I want it to do.
Thanks!

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