Re: [android-developers] return object or listobject
I'm guessing your colleague felt that something where a response
of 0 things to operate on is not an error condition it is easier to
deal with a 0 entry list, for example:
public int getFooTotalValue() {
int fooTotal = 0;
ListFoo fooList = getFooList();
for (Foo afoo : fooList ) {
fooTotal += afoo.getValue();
}
return fooTotal;
}
Handles the 0 length case without any checks. (Works nice for
totals, or do an operation on a foo loops, not so well for average,
or search for mean/median type loops.) It's nice in that it doesn't
make assumptions about what the List consuming code considers
an acceptable response. If you are prescient and know that every
possible consumer of the getFooList() result MUST have at least
one entry or it's an exceptional condition, I suppose you could go
with the NPE check, but I tend to feel that in isolation
if (!fooList.isEmpty()) {
}
gives me more information than
if (fooList != null) {
}
or the even more compact
if (fooList) {
}
As the isEmpty() case I know the list was set up correctly and I didn't
process fooList because there were no foo, where the !=null case could
be some initialization issue with foo (in the case of reading a file to
fill foo, I might want fooList = null for error condition of no/improperly
formatted file, empty list for read the file and found no foo.)
Dan
On Monday, August 4, 2014 3:51:38 PM UTC-4, sweety fx wrote:
My colleague mentioned list is the better way of doing it. So that we
don't face null pointer exceptions. since we check for list.isEmpty()
But I wasn't sure, thats why I am checking.
On Monday, August 4, 2014 3:42:35 PM UTC-4, Steve Gabrilowitz wrote:
How would list.isEmpty() be better than object==null? If you never plan
on returning more than one object then it makes no sense to use a list.
On Aug 4, 2014 11:04 AM, sweety fx fxsw...@gmail.com wrote:
A method is supposed to return a object when called.
Which is better to implement for the method:
1. Is it better to have the method return an object.
2. Or return ListObject where the single object is added to the array
list.
because, we can check for list.isEmpty() which is better than
object!=null. not sure which one is better.
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[android-developers] return object or listobject
A method is supposed to return a object when called. Which is better to implement for the method: 1. Is it better to have the method return an object. 2. Or return ListObject where the single object is added to the array list. because, we can check for list.isEmpty() which is better than object!=null. not sure which one is better. -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en --- You received this message because you are subscribed to the Google Groups Android Developers group. To unsubscribe from this group and stop receiving emails from it, send an email to android-developers+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [android-developers] return object or listobject
How would list.isEmpty() be better than object==null? If you never plan on returning more than one object then it makes no sense to use a list. On Aug 4, 2014 11:04 AM, sweety fx fxswe...@gmail.com wrote: A method is supposed to return a object when called. Which is better to implement for the method: 1. Is it better to have the method return an object. 2. Or return ListObject where the single object is added to the array list. because, we can check for list.isEmpty() which is better than object!=null. not sure which one is better. -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en --- You received this message because you are subscribed to the Google Groups Android Developers group. To unsubscribe from this group and stop receiving emails from it, send an email to android-developers+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en --- You received this message because you are subscribed to the Google Groups Android Developers group. To unsubscribe from this group and stop receiving emails from it, send an email to android-developers+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [android-developers] return object or listobject
My colleague mentioned list is the better way of doing it. So that we don't face null pointer exceptions. since we check for list.isEmpty() But I wasn't sure, thats why I am checking. On Monday, August 4, 2014 3:42:35 PM UTC-4, Steve Gabrilowitz wrote: How would list.isEmpty() be better than object==null? If you never plan on returning more than one object then it makes no sense to use a list. On Aug 4, 2014 11:04 AM, sweety fx fxsw...@gmail.com javascript: wrote: A method is supposed to return a object when called. Which is better to implement for the method: 1. Is it better to have the method return an object. 2. Or return ListObject where the single object is added to the array list. because, we can check for list.isEmpty() which is better than object!=null. not sure which one is better. -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-d...@googlegroups.com javascript: To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com javascript: For more options, visit this group at http://groups.google.com/group/android-developers?hl=en --- You received this message because you are subscribed to the Google Groups Android Developers group. To unsubscribe from this group and stop receiving emails from it, send an email to android-developers+unsubscr...@googlegroups.com javascript:. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en --- You received this message because you are subscribed to the Google Groups Android Developers group. To unsubscribe from this group and stop receiving emails from it, send an email to android-developers+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [android-developers] return object or listobject
On Mon, Aug 4, 2014 at 2:51 PM, sweety fx fxswe...@gmail.com wrote: My colleague mentioned list is the better way of doing it. So that we don't face null pointer exceptions. since we check for list.isEmpty() You're replacing one if check for another and making your code confusing. This is not better. - TreKing http://sites.google.com/site/rezmobileapps/treking - Chicago transit tracking app for Android-powered devices -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en --- You received this message because you are subscribed to the Google Groups Android Developers group. To unsubscribe from this group and stop receiving emails from it, send an email to android-developers+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [android-developers] return object or listobject
It would be my opinion that you return a Object if you do not intend to return any more than one of them. Else it may become confusing reading your code later. Regards Damien On Tue, Aug 5, 2014 at 12:34 AM, sweety fx fxswe...@gmail.com wrote: A method is supposed to return a object when called. Which is better to implement for the method: 1. Is it better to have the method return an object. 2. Or return ListObject where the single object is added to the array list. because, we can check for list.isEmpty() which is better than object!=null. not sure which one is better. -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en --- You received this message because you are subscribed to the Google Groups Android Developers group. To unsubscribe from this group and stop receiving emails from it, send an email to android-developers+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en --- You received this message because you are subscribed to the Google Groups Android Developers group. To unsubscribe from this group and stop receiving emails from it, send an email to android-developers+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
