英文:
Formatting Verbose Dates in Go
问题
我想要以人类可读的格式生成格式化日期。通常在英语环境中，日期的后缀会用于表示月份的天数，例如1st、2nd、3rd、4th、5th等等。
我尝试使用格式字符串"Monday 2nd January"来格式化这样的日期，但似乎不起作用。
例如，在playground中：
import (
"fmt"
"time"
)
const format = "Monday 2nd January"
func main() {
t1 := time.Date(2015, 3, 4, 1, 1, 1, 1, time.UTC)
fmt.Println(t1.Format(format))
t2 := time.Date(2015, 3, 1, 1, 1, 1, 1, time.UTC)
fmt.Println(t2.Format(format))
}
这将生成结果：
Wednesday 4nd March
Sunday 1nd March
但我期望的结果是：
Wednesday 4th March
Sunday 1st March
我做错了什么？
英文:
I would like to produce formatted dates in a human-readable format. Typically in an English locale, suffixes are used for the day of the month, i.e. 1st, 2nd, 3rd, 4th, 5th and so on.
I tried using the format string "Monday 2nd January" to format such dates but it doesn't appear to work.
E.g. in the playground:
import (
"fmt"
"time"
)
const format = "Monday 2nd January"
func main() {
t1 := time.Date(2015, 3, 4, 1, 1, 1, 1, time.UTC)
fmt.Println(t1.Format(format))
t2 := time.Date(2015, 3, 1, 1, 1, 1, 1, time.UTC)
fmt.Println(t2.Format(format))
}
This generates the result
Wednesday 4nd March
Sunday 1nd March
but I would expect
Wednesday 4th March
Sunday 1st March
What have I done wrong?
答案1
得分: 6
这种格式不支持，你需要自己实现，可以像这样使用一个（hacky）的方法：
func formatDate(t time.Time) string {
suffix := "th"
switch t.Day() {
case 1, 21, 31:
suffix = "st"
case 2, 22:
suffix = "nd"
case 3, 23:
suffix = "rd"
}
return t.Format("Monday 2" + suffix + " January")
}
[kbd][play](http://play.golang.org/p/9szb7X1mum)[/kbd]
英文:
It doesn't support that kind of formatting, you will have to implement it yourself, something (hacky) like this:
func formatDate(t time.Time) string {
suffix := "th"
switch t.Day() {
case 1, 21, 31:
suffix = "st"
case 2, 22:
suffix = "nd"
case 3, 23:
suffix = "rd"
}
return t.Format("Monday 2" + suffix + " January")
}
<kbd>play</kbd>
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