/
generics.go
72 lines (57 loc) · 993 Bytes
/
generics.go
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package gotk
import (
"golang.org/x/exp/constraints"
)
func VectorIndex[T constraints.Ordered](list []T, v T) int {
for i := range list {
if list[i] == v {
return i
}
}
return -1
}
func EqualVector[T constraints.Ordered](arr1, arr2 []T) (ok bool) {
if len(arr1) != len(arr2) {
return false
}
for i := range arr1 {
if arr1[i] != arr2[i] {
return false
}
}
return true
}
func UniqVector[T constraints.Ordered](arr []T) (list []T) {
n := len(arr)
list = make([]T, 0, n)
if len(arr) == 0 {
return list
}
mp := make(map[T]bool, n)
for _, v := range arr {
if !mp[v] {
list = append(list, v)
mp[v] = true
}
}
return list
}
func First[T any](v []T) *T {
if len(v) == 0 {
return nil
}
return &v[0]
}
func Last[T any](v []T) *T {
var n = len(v)
if n == 0 {
return nil
}
return &v[n-1]
}
func SliceGet[T any](slice []T, index int) (val T, exists bool) {
if index > len(slice)-1 {
return val, false
}
return slice[index], true
}