// Return true if value is in slice. Or false. Also reutrn false if value or
// slice is nil, or the length of slice is 0.
//
// The type of value must be consistent with the type of the element of slice.
// Or panic. If the type is the customizable struct, it MUST implement the interface
// Comparer in the package "github.com/xgfone/go-tools/compare".
func In(value interface{}, slice interface{}) bool {
if value == nil || slice == nil {
return false
}
stype := reflect.ValueOf(slice)
if stype.Kind() == reflect.Ptr {
stype = stype.Elem()
}
if stype.Kind() != reflect.Array && stype.Kind() != reflect.Slice {
panic("The second argument is not a slice or an array")
}
slen := stype.Len()
if slen == 0 {
return false
}
vv := reflect.ValueOf(value)
if stype.Index(0).Kind() != reflect.ValueOf(value).Kind() {
panic("The type of value must be consistent with the type of the element of slice")
}
for i := 0; i < slen; i++ {
v1 := vv.Interface()
v2 := stype.Index(i).Interface()
if compare.EQ(v1, v2) {
return true
}
}
return false
}
func TestCompare(t *testing.T) {
v1 := []uint16{1, 2, 4}
v2 := []uint16{1, 2, 3}
if !compare.GT(v1, v2) {
t.Fail()
}
if !compare.LT(v2, v1) {
t.Fail()
}
if compare.EQ(v1, v2) {
t.Fail()
}
if !compare.EQ([]int{1, 2, 3}, []int{1, 2, 3}) {
t.Fail()
}
if compare.LT([]int{1, 2, 3}, []int{1, 2, 3}) {
t.Fail()
}
}