2017-01-12 15:47 阅读 149


I have a slice of values holding timestamps of different length. Most of them look like this:


but some of them are shorter:


If I do:

str := dataSlice[j][0].(string)
layout := "2006-01-02T15:04:05.000000Z"
t, err := time.Parse(layout, str)

I get errors like:

parsing time "2016-10-23T02:38:45.25986Z" as "2006-01-02T15:04:05.000000Z": cannot parse "" as ".000000"
parsing time "2016-10-23T21:43:59.0175Z" as "2006-01-02T15:04:05.000000Z": cannot parse ".0175Z" as ".000000"

I want to parse them exactly like they originally are. How can I dynamically switch the layout corresponding to the length? (And why do the error messages differ?)

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2条回答 默认 最新

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    dqunzip3183 dqunzip3183 2017-01-12 16:08

    For time layouts, if the fractional seconds are optional, use 9 instead of 0 in the layout. For example, 2006-01-02T15:04:05.00000Z matches only times with 5 digits after the decimal place. However, 2006-01-02T15:04:05.9Z matches a time with any number of digits after the decimal, including zero.


    The Time.Format documentation provides examples, the last one of which explains this behavior.

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  • dongzhun4898 dongzhun4898 2017-01-12 16:08

    Just replace 000000 with 999999:

    layout := "2006-01-02T15:04:05.999999Z"

    Playground: https://play.golang.org/p/Wd7kXIpoWO.

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