1 package funk
2
3 import (
4 "reflect"
5 )
6
7
8 func Compact(value interface{}) interface{} {
9 arr := redirectValue(reflect.ValueOf(value))
10
11 if arr.Kind() != reflect.Slice && arr.Kind() != reflect.Array {
12 panic("First parameter must be array or slice")
13 }
14
15 sliceElemType := sliceElem(arr.Type())
16 resultSliceType := reflect.SliceOf(sliceElemType)
17 result := reflect.MakeSlice(resultSliceType, 0, 0)
18
19 for i := 0; i < arr.Len(); i++ {
20 elemVal := arr.Index(i)
21
22 if elemVal.Kind() == reflect.Interface {
23 elemVal = elemVal.Elem()
24 }
25
26 redirectedElemVal := redirectValue(elemVal)
27
28 switch redirectedElemVal.Kind() {
29 case reflect.Invalid:
30 continue
31 case reflect.Func:
32 if redirectedElemVal.IsNil() {
33 continue
34 }
35 case reflect.Map, reflect.Slice, reflect.Chan:
36 if redirectedElemVal.Len() == 0 {
37 continue
38 }
39 default:
40 defaultValue := reflect.Zero(redirectedElemVal.Type()).Interface()
41 if redirectedElemVal.Interface() == defaultValue {
42 continue
43 }
44 }
45
46 result = reflect.Append(result, elemVal)
47 }
48
49 return result.Interface()
50 }
51
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