112 lines
1.8 KiB
Go
112 lines
1.8 KiB
Go
package u
|
||
|
||
import (
|
||
"fmt"
|
||
"time"
|
||
)
|
||
|
||
// ====================
|
||
// 逻辑
|
||
// ====================
|
||
|
||
func Else[T any](v *T, or T) T {
|
||
if v == nil {
|
||
return or
|
||
} else {
|
||
return *v
|
||
}
|
||
}
|
||
|
||
func ElseTo[A any, B any](a *A, f func(A) B) *B {
|
||
if a == nil {
|
||
return nil
|
||
} else {
|
||
return P(f(*a))
|
||
}
|
||
}
|
||
|
||
// ====================
|
||
// 指针
|
||
// ====================
|
||
|
||
// P 原地创建值的指针
|
||
func P[T any](v T) *T {
|
||
return &v
|
||
}
|
||
|
||
// Z 转换值为不可空，如果值为 nil，则返回其零值
|
||
func Z[T any](v *T) T {
|
||
if v == nil {
|
||
var zero T
|
||
return zero
|
||
}
|
||
return *v
|
||
}
|
||
|
||
// X 转换值为可空，如果值为零值，则返回 nil
|
||
func X[T comparable](v T) *T {
|
||
var zero T
|
||
if v == zero {
|
||
return nil
|
||
}
|
||
return &v
|
||
}
|
||
|
||
// ====================
|
||
// 数组
|
||
// ====================
|
||
|
||
func Map[T any, R any](src []T, convert func(T) R) []R {
|
||
dst := make([]R, len(src))
|
||
for i, item := range src {
|
||
dst[i] = convert(item)
|
||
}
|
||
return dst
|
||
}
|
||
|
||
// ====================
|
||
// 时间
|
||
// ====================
|
||
|
||
func DateHead(date time.Time) time.Time {
|
||
var y, m, d = date.Date()
|
||
return time.Date(y, m, d, 0, 0, 0, 0, date.Location())
|
||
}
|
||
|
||
func DateFoot(date time.Time) time.Time {
|
||
var y, m, d = date.Date()
|
||
return time.Date(y, m, d, 23, 59, 59, 999999999, date.Location())
|
||
}
|
||
|
||
func Today() time.Time {
|
||
return DateHead(time.Now())
|
||
}
|
||
|
||
func IsSameDate(date1, date2 time.Time) bool {
|
||
var y1, m1, d1 = date1.Date()
|
||
var y2, m2, d2 = date2.Date()
|
||
return y1 == y2 && m1 == m2 && d1 == d2
|
||
}
|
||
|
||
func IsToday(date time.Time) bool {
|
||
return IsSameDate(date, time.Now())
|
||
}
|
||
|
||
// ====================
|
||
// 错误
|
||
// ====================
|
||
|
||
func CombineErrors(errs []error) error {
|
||
var combinedErr error = nil
|
||
for _, err := range errs {
|
||
if err != nil {
|
||
if combinedErr == nil {
|
||
combinedErr = err
|
||
} else {
|
||
combinedErr = fmt.Errorf("%v; %w", combinedErr, err)
|
||
}
|
||
}
|
||
}
|
||
return combinedErr
|
||
}
|