Method Contains

value.go:327–361

Contains checks whether the underlying value (which must be of type struct, map, string, array or slice) contains of another Value (e. g. used to check whether a struct contains of a specific field or a map contains a specific key). Example: AsValue("Hello, World!").Contains(AsValue("World")) == tr

(other *Value)

// Example:
//     AsValue("Hello, World!").Contains(AsValue("World")) == true
func (v *Value) Contains(other *Value) bool {
	switch v.getResolvedValue().Kind() {
	case reflect.Struct:
		fieldValue := v.getResolvedValue().FieldByName(other.String())
		return fieldValue.IsValid()
	case reflect.Map:
		var mapValue reflect.Value
		switch other.Interface().(type) {
		case int:
			mapValue = v.getResolvedValue().MapIndex(other.getResolvedValue())
		case string:
			mapValue = v.getResolvedValue().MapIndex(other.getResolvedValue())
		default:
			logf("Value.Contains() does not support lookup type '%s'\n", other.getResolvedValue().Kind().String())
			return false
		}

		return mapValue.IsValid()
	case reflect.String:
		return strings.Contains(v.getResolvedValue().String(), other.String())

	case reflect.Slice, reflect.Array:
		for i := 0; i < v.getResolvedValue().Len(); i++ {
			item := v.getResolvedValue().Index(i)
			if other.EqualValueTo(AsValue(item.Interface())) {
				return true
			}
		}
		return false

	default:
		logf("Value.Contains() not available for type: %s\n", v.getResolvedValue().Kind().String())
		return false
	}
}

// CanSlice checks whether the underlying value is of type array, slice or string.
// You normally would use CanSlice() before using the Slice() operation.