Mixing
Does .GroupBy() guarantee order in its groupings?
Say I have an (ordered) sequence of animals:
Eagle
Elephant
Tarantula
Terrapin
Tiger
and I group by first letter:
Animals.GroupBy(animal => animal.First())
will the elements of the IGroupings in the resulting sequence be in the same order as the input sequence?
c# linq group-by linq-to-objects ilookup
asked Sep 11 '12 at 21:04
spenderspender
86.4k21157280
add a comment |
Say I have an (ordered) sequence of animals:
Eagle
Elephant
Tarantula
Terrapin
Tiger
and I group by first letter:
Animals.GroupBy(animal => animal.First())
will the elements of the IGroupings in the resulting sequence be in the same order as the input sequence?
c# linq group-by linq-to-objects ilookup
asked Sep 11 '12 at 21:04
spenderspender
86.4k21157280
add a comment |
Say I have an (ordered) sequence of animals:
Eagle
Elephant
Tarantula
Terrapin
Tiger
and I group by first letter:
Animals.GroupBy(animal => animal.First())
will the elements of the IGroupings in the resulting sequence be in the same order as the input sequence?
c# linq group-by linq-to-objects ilookup
asked Sep 11 '12 at 21:04
spenderspender
86.4k21157280
Say I have an (ordered) sequence of animals:
Eagle
Elephant
Tarantula
Terrapin
Tiger
and I group by first letter:
Animals.GroupBy(animal => animal.First())
will the elements of the IGroupings in the resulting sequence be in the same order as the input sequence?
c# linq group-by linq-to-objects ilookup
c# linq group-by linq-to-objects ilookup
asked Sep 11 '12 at 21:04
spenderspender
86.4k21157280
asked Sep 11 '12 at 21:04
spenderspender
86.4k21157280
asked Sep 11 '12 at 21:04
spenderspender
86.4k21157280
asked Sep 11 '12 at 21:04
spenderspender
86.4k21157280
asked Sep 11 '12 at 21:04
spenderspender
86.4k21157280
86.4k21157280
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
Yes, they will be: GroupBy (MSDN).
The IGrouping<TKey, TElement> objects are yielded in an order based on the order of the elements in source that produced the first key of each IGrouping<TKey, TElement>. Elements in a grouping are yielded in the order they appear in source.
answered Sep 11 '12 at 21:06
McGarnagleMcGarnagle
86k23180227
3
Aw crud. I feel lazy now. Thanks for looking that up for me. ;)
– spender
Sep 11 '12 at 21:07
add a comment |
Quote from the MSDN page for GroupBy:
The
IGrouping<TKey, TElement>objects are yielded in an order based on the order of the elements in source that produced the first key of eachIGrouping<TKey, TElement>. Elements in a grouping are yielded in the order they appear in source.
So your example will result in:
Group 1
- Eagle
- Elephant
Group 2
- Tarantula
- Terrapin
- Tiger
Of course that only applies to the IEnumerable<T> implementation. The IQueryable<T> implementation has no such guarantee.
answered Sep 11 '12 at 21:06
ServyServy
177k18234349
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
Yes, they will be: GroupBy (MSDN).
The IGrouping<TKey, TElement> objects are yielded in an order based on the order of the elements in source that produced the first key of each IGrouping<TKey, TElement>. Elements in a grouping are yielded in the order they appear in source.
answered Sep 11 '12 at 21:06
McGarnagleMcGarnagle
86k23180227
3
Aw crud. I feel lazy now. Thanks for looking that up for me. ;)
– spender
Sep 11 '12 at 21:07
add a comment |
Yes, they will be: GroupBy (MSDN).
The IGrouping<TKey, TElement> objects are yielded in an order based on the order of the elements in source that produced the first key of each IGrouping<TKey, TElement>. Elements in a grouping are yielded in the order they appear in source.
answered Sep 11 '12 at 21:06
McGarnagleMcGarnagle
86k23180227
3
Aw crud. I feel lazy now. Thanks for looking that up for me. ;)
– spender
Sep 11 '12 at 21:07
add a comment |
Yes, they will be: GroupBy (MSDN).
The IGrouping<TKey, TElement> objects are yielded in an order based on the order of the elements in source that produced the first key of each IGrouping<TKey, TElement>. Elements in a grouping are yielded in the order they appear in source.
answered Sep 11 '12 at 21:06
McGarnagleMcGarnagle
86k23180227
Yes, they will be: GroupBy (MSDN).
The IGrouping<TKey, TElement> objects are yielded in an order based on the order of the elements in source that produced the first key of each IGrouping<TKey, TElement>. Elements in a grouping are yielded in the order they appear in source.
answered Sep 11 '12 at 21:06
McGarnagleMcGarnagle
86k23180227
answered Sep 11 '12 at 21:06
McGarnagleMcGarnagle
86k23180227
answered Sep 11 '12 at 21:06
McGarnagleMcGarnagle
86k23180227
answered Sep 11 '12 at 21:06
McGarnagleMcGarnagle
86k23180227
86k23180227
3
Aw crud. I feel lazy now. Thanks for looking that up for me. ;)
– spender
Sep 11 '12 at 21:07
add a comment |
3
Aw crud. I feel lazy now. Thanks for looking that up for me. ;)
– spender
Sep 11 '12 at 21:07
3
3
Aw crud. I feel lazy now. Thanks for looking that up for me. ;)
– spender
Sep 11 '12 at 21:07
Aw crud. I feel lazy now. Thanks for looking that up for me. ;)
– spender
Sep 11 '12 at 21:07
add a comment |
Quote from the MSDN page for GroupBy:
The
IGrouping<TKey, TElement>objects are yielded in an order based on the order of the elements in source that produced the first key of eachIGrouping<TKey, TElement>. Elements in a grouping are yielded in the order they appear in source.
So your example will result in:
Group 1
- Eagle
- Elephant
Group 2
- Tarantula
- Terrapin
- Tiger
Of course that only applies to the IEnumerable<T> implementation. The IQueryable<T> implementation has no such guarantee.
answered Sep 11 '12 at 21:06
ServyServy
177k18234349
add a comment |
Quote from the MSDN page for GroupBy:
The
IGrouping<TKey, TElement>objects are yielded in an order based on the order of the elements in source that produced the first key of eachIGrouping<TKey, TElement>. Elements in a grouping are yielded in the order they appear in source.
So your example will result in:
Group 1
- Eagle
- Elephant
Group 2
- Tarantula
- Terrapin
- Tiger
Of course that only applies to the IEnumerable<T> implementation. The IQueryable<T> implementation has no such guarantee.
answered Sep 11 '12 at 21:06
ServyServy
177k18234349
add a comment |
Quote from the MSDN page for GroupBy:
The
IGrouping<TKey, TElement>objects are yielded in an order based on the order of the elements in source that produced the first key of eachIGrouping<TKey, TElement>. Elements in a grouping are yielded in the order they appear in source.
So your example will result in:
Group 1
- Eagle
- Elephant
Group 2
- Tarantula
- Terrapin
- Tiger
Of course that only applies to the IEnumerable<T> implementation. The IQueryable<T> implementation has no such guarantee.
answered Sep 11 '12 at 21:06
ServyServy
177k18234349
Quote from the MSDN page for GroupBy:
The
IGrouping<TKey, TElement>objects are yielded in an order based on the order of the elements in source that produced the first key of eachIGrouping<TKey, TElement>. Elements in a grouping are yielded in the order they appear in source.
So your example will result in:
Group 1
- Eagle
- Elephant
Group 2
- Tarantula
- Terrapin
- Tiger
Of course that only applies to the IEnumerable<T> implementation. The IQueryable<T> implementation has no such guarantee.
answered Sep 11 '12 at 21:06
ServyServy
177k18234349
edited Sep 11 '12 at 21:11
answered Sep 11 '12 at 21:06
ServyServy
177k18234349
answered Sep 11 '12 at 21:06
ServyServy
177k18234349
answered Sep 11 '12 at 21:06
ServyServy
177k18234349
177k18234349
add a comment |
add a comment |
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