contains.go

func Contains(s, value interface{}) bool {
	v := reflect.ValueOf(s)
	for i := 0; i < v.NumField(); i++ {
		field := v.Field(i)
		typeOfField := field.Type()
		switch typeOfField {
		case stringType:
			if containsString(field.String(), value) {
				return true
			}
		case intType, int8Type, int16Type, int32Type, int64Type:
			if containsInt(field.Int(), value) {
				return true
			}
		case boolType:
			if containsBool(field.Bool(), value) {
				return true
			}
		case float32Type:
			if containsFloat32(field.Interface().(float32), value) {
				return true
			}
		case float64Type:
			if containsFloat64(field.Interface().(float64), value) {
				return true
			}
		case complex64Type:
			if containsComplex64(field.Interface().(complex64), value) {
				return true
			}
		case complex128Type:
			if containsComplex128(field.Interface().(complex128), value) {
				return true
			}
		}
	}
	return false
}

/*
	Contains helper functions
*/
func containsString(s string, v interface{}) bool {
	switch v.(type) {
	case string:
		if v.(string) == s {
			return true
		}
	}
	return false
}

func containsInt(s int64, v interface{}) bool {
	switch v.(type) {
	case int64:
		if v.(int64) == s {
			return true
		}
	case int32:
		if int64(v.(int32)) == s {
			return true
		}
	case int16:
		if int64(v.(int16)) == s {
			return true
		}
	case int8:
		if int64(v.(int8)) == s {
			return true
		}
	case int:
		if int64(v.(int)) == s {
			return true
		}
	}
	return false
}

func containsBool(s bool, v interface{}) bool {
	switch v.(type) {
	case bool:
		if v.(bool) == s {
			return true
		}
	}
	return false
}

func containsFloat32(s float32, v interface{}) bool {
	switch v.(type) {
	case float32:
		if v.(float32) == s {
			return true
		}
	}
	return false
}

func containsFloat64(s float64, v interface{}) bool {
	switch v.(type) {
	case float64:
		if v.(float64) == s {
			return true
		}
	}
	return false
}

func containsComplex64(s complex64, v interface{}) bool {
	switch v.(type) {
	case complex64:
		if v.(complex64) == s {
			return true
		}
	}
	return false
}

func containsComplex128(s complex128, v interface{}) bool {
	switch v.(type) {
	case complex128:
		if v.(complex128) == s {
			return true
		}
	}
	return false
}