How to cast Any which can be Realm List or String to a Realm List when applicable
0
In input we have var value: Any which we don't control.
value can represent a String (or anything) as well as a List<MyRealmObject>. And it's in this Realm case that I have a question.
How can I cast the value (Any) to a RealmList?
My end goal is to convert this Realm List to an Array.
When I do value as? List<Object> I get nil.
Or in other words, I would like to avoid this non-generic code:
func foo(value: Any)
if let val = value as? List<RealmTag>
myArray = Array(val)
else if let val = value as? List<RealmUser>
myArray = Array(val)
else if let val = value as? List<RealmService>
myArray = Array(val)
etc...
arrays swift generics realm
asked Nov 12 '18 at 11:48
KalzemKalzem
4,88253969
add a comment |
0
In input we have var value: Any which we don't control.
value can represent a String (or anything) as well as a List<MyRealmObject>. And it's in this Realm case that I have a question.
How can I cast the value (Any) to a RealmList?
My end goal is to convert this Realm List to an Array.
When I do value as? List<Object> I get nil.
Or in other words, I would like to avoid this non-generic code:
func foo(value: Any)
if let val = value as? List<RealmTag>
myArray = Array(val)
else if let val = value as? List<RealmUser>
myArray = Array(val)
else if let val = value as? List<RealmService>
myArray = Array(val)
etc...
arrays swift generics realm
asked Nov 12 '18 at 11:48
KalzemKalzem
4,88253969
Did you try value as? List<MyRealmObject>
– Robert Dresler
Nov 12 '18 at 11:53
@RobertDresler Edited my question to make it clearer, I would like to avoid cast-check the value to all the existing RealmObject I have.
– Kalzem
Nov 12 '18 at 11:56
I'm afraid, the only non-generic type you can cast it safely isRLMListBase.
– user28434
Nov 12 '18 at 11:59
@user28434 That won't help because ListBase isn't a Sequence, so I lose the information of the elements of the list and I can't convert it to an Array afterwards.
– Kalzem
Nov 12 '18 at 12:05
Well, it was the thing I've discovered myself too, no other type in Hierarchy will do, exceptRLMListBase. And you can convert it toArray, or rather copy element to new array, becauseRLMListBasesupportsFastEnumeration.
– user28434
Nov 12 '18 at 12:10
add a comment |
0
0
0
In input we have var value: Any which we don't control.
value can represent a String (or anything) as well as a List<MyRealmObject>. And it's in this Realm case that I have a question.
How can I cast the value (Any) to a RealmList?
My end goal is to convert this Realm List to an Array.
When I do value as? List<Object> I get nil.
Or in other words, I would like to avoid this non-generic code:
func foo(value: Any)
if let val = value as? List<RealmTag>
myArray = Array(val)
else if let val = value as? List<RealmUser>
myArray = Array(val)
else if let val = value as? List<RealmService>
myArray = Array(val)
etc...
arrays swift generics realm
asked Nov 12 '18 at 11:48
KalzemKalzem
4,88253969
In input we have var value: Any which we don't control.
value can represent a String (or anything) as well as a List<MyRealmObject>. And it's in this Realm case that I have a question.
How can I cast the value (Any) to a RealmList?
My end goal is to convert this Realm List to an Array.
When I do value as? List<Object> I get nil.
Or in other words, I would like to avoid this non-generic code:
func foo(value: Any)
if let val = value as? List<RealmTag>
myArray = Array(val)
else if let val = value as? List<RealmUser>
myArray = Array(val)
else if let val = value as? List<RealmService>
myArray = Array(val)
etc...
arrays swift generics realm
arrays swift generics realm
asked Nov 12 '18 at 11:48
KalzemKalzem
4,88253969
asked Nov 12 '18 at 11:48
KalzemKalzem
4,88253969
edited Nov 12 '18 at 11:55
Kalzem
asked Nov 12 '18 at 11:48
KalzemKalzem
4,88253969
asked Nov 12 '18 at 11:48
KalzemKalzem
4,88253969
asked Nov 12 '18 at 11:48
KalzemKalzem
4,88253969
4,88253969
Did you try value as? List<MyRealmObject>
– Robert Dresler
Nov 12 '18 at 11:53
@RobertDresler Edited my question to make it clearer, I would like to avoid cast-check the value to all the existing RealmObject I have.
– Kalzem
Nov 12 '18 at 11:56
I'm afraid, the only non-generic type you can cast it safely isRLMListBase.
– user28434
Nov 12 '18 at 11:59
@user28434 That won't help because ListBase isn't a Sequence, so I lose the information of the elements of the list and I can't convert it to an Array afterwards.
– Kalzem
Nov 12 '18 at 12:05
Well, it was the thing I've discovered myself too, no other type in Hierarchy will do, exceptRLMListBase. And you can convert it toArray, or rather copy element to new array, becauseRLMListBasesupportsFastEnumeration.
– user28434
Nov 12 '18 at 12:10
add a comment |
Did you try value as? List<MyRealmObject>
– Robert Dresler
Nov 12 '18 at 11:53
@RobertDresler Edited my question to make it clearer, I would like to avoid cast-check the value to all the existing RealmObject I have.
– Kalzem
Nov 12 '18 at 11:56
I'm afraid, the only non-generic type you can cast it safely isRLMListBase.
– user28434
Nov 12 '18 at 11:59
@user28434 That won't help because ListBase isn't a Sequence, so I lose the information of the elements of the list and I can't convert it to an Array afterwards.
– Kalzem
Nov 12 '18 at 12:05
Well, it was the thing I've discovered myself too, no other type in Hierarchy will do, exceptRLMListBase. And you can convert it toArray, or rather copy element to new array, becauseRLMListBasesupportsFastEnumeration.
– user28434
Nov 12 '18 at 12:10
Did you try value as? List<MyRealmObject>
– Robert Dresler
Nov 12 '18 at 11:53
Did you try value as? List<MyRealmObject>
– Robert Dresler
Nov 12 '18 at 11:53
@RobertDresler Edited my question to make it clearer, I would like to avoid cast-check the value to all the existing RealmObject I have.
– Kalzem
Nov 12 '18 at 11:56
@RobertDresler Edited my question to make it clearer, I would like to avoid cast-check the value to all the existing RealmObject I have.
– Kalzem
Nov 12 '18 at 11:56
I'm afraid, the only non-generic type you can cast it safely is
RLMListBase.– user28434
Nov 12 '18 at 11:59
I'm afraid, the only non-generic type you can cast it safely is
RLMListBase.– user28434
Nov 12 '18 at 11:59
@user28434 That won't help because ListBase isn't a Sequence, so I lose the information of the elements of the list and I can't convert it to an Array afterwards.
– Kalzem
Nov 12 '18 at 12:05
@user28434 That won't help because ListBase isn't a Sequence, so I lose the information of the elements of the list and I can't convert it to an Array afterwards.
– Kalzem
Nov 12 '18 at 12:05
Well, it was the thing I've discovered myself too, no other type in Hierarchy will do, except
RLMListBase. And you can convert it to Array, or rather copy element to new array, because RLMListBase supports FastEnumeration.– user28434
Nov 12 '18 at 12:10
Well, it was the thing I've discovered myself too, no other type in Hierarchy will do, except
RLMListBase. And you can convert it to Array, or rather copy element to new array, because RLMListBase supports FastEnumeration.– user28434
Nov 12 '18 at 12:10
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Did you try value as? List<MyRealmObject>
– Robert Dresler
Nov 12 '18 at 11:53
@RobertDresler Edited my question to make it clearer, I would like to avoid cast-check the value to all the existing RealmObject I have.
– Kalzem
Nov 12 '18 at 11:56
I'm afraid, the only non-generic type you can cast it safely is
RLMListBase.– user28434
Nov 12 '18 at 11:59
@user28434 That won't help because ListBase isn't a Sequence, so I lose the information of the elements of the list and I can't convert it to an Array afterwards.
– Kalzem
Nov 12 '18 at 12:05
Well, it was the thing I've discovered myself too, no other type in Hierarchy will do, except
RLMListBase. And you can convert it toArray, or rather copy element to new array, becauseRLMListBasesupportsFastEnumeration.– user28434
Nov 12 '18 at 12:10