70 lines
1.2 KiB
Go
70 lines
1.2 KiB
Go
package helper
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import (
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"crypto/md5"
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"fmt"
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"io"
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"reflect"
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"strings"
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)
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func IsContainInArr[T comparable](a T, arr []T) bool {
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for _, v := range arr {
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if a == v {
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return true
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}
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}
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return false
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}
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func StructColumn[T any, M any](arr []M, field string) (r []T) {
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for i := 0; i < len(arr); i++ {
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v := reflect.ValueOf(arr[i]).FieldByName(field).Interface()
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if val, ok := v.(T); ok {
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r = append(r, val)
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}
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}
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return
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}
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func RangeSlice[T ~int | ~uint | ~int64 | ~int8 | ~int16 | ~int32 | ~uint64](start, end, step T) []T {
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r := make([]T, 0, int((end-start+1)/step+1))
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for i := start; i <= end; {
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r = append(r, i)
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i = i + step
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}
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return r
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}
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func StrJoin(s ...string) (str string) {
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if len(s) == 1 {
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return s[0]
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} else if len(s) > 1 {
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b := strings.Builder{}
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for _, s2 := range s {
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b.WriteString(s2)
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}
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str = b.String()
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}
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return
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}
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func SlicePagination[T any](arr []T, page, pageSize int) []T {
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start := (page - 1) * pageSize
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l := len(arr)
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if start > l {
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start = l
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}
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end := page * pageSize
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if l < end {
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end = l
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}
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return arr[start:end]
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}
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func StringMd5(str string) string {
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h := md5.New()
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io.WriteString(h, str)
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return fmt.Sprintf("%x", h.Sum(nil))
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}
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