Mixing
How to getOrElse with another Option in Scala
Let's assume that we have an option foo1 and an option foo2:
val foo1: Option[Foo]
val foo2: Option[Foo]
Is there an operator/function that allows me to return the value of the foo2 when foo1 is None?
val finalFoo: Option[Foo] = foo1.getOrElseOption(foo2)
The above getOrElseOption does not exist obviously. I know we can do sth like this, but it is somewhat verbose and hard to understand:
foo1.map(Some(_)).getOrElse(foo2).
scala option partial-functions
edited Nov 19 '18 at 22:16
Andrey Tyukin
27.1k42349
asked Nov 19 '18 at 22:09
Yuchen ZhongYuchen Zhong
11.6k781127
add a comment |
Let's assume that we have an option foo1 and an option foo2:
val foo1: Option[Foo]
val foo2: Option[Foo]
Is there an operator/function that allows me to return the value of the foo2 when foo1 is None?
val finalFoo: Option[Foo] = foo1.getOrElseOption(foo2)
The above getOrElseOption does not exist obviously. I know we can do sth like this, but it is somewhat verbose and hard to understand:
foo1.map(Some(_)).getOrElse(foo2).
scala option partial-functions
edited Nov 19 '18 at 22:16
Andrey Tyukin
27.1k42349
asked Nov 19 '18 at 22:09
Yuchen ZhongYuchen Zhong
11.6k781127
4
orElse
– Andrey Tyukin
Nov 19 '18 at 22:12
What aboutorElse?
– Luis Miguel Mejía Suárez
Nov 19 '18 at 22:12
add a comment |
Let's assume that we have an option foo1 and an option foo2:
val foo1: Option[Foo]
val foo2: Option[Foo]
Is there an operator/function that allows me to return the value of the foo2 when foo1 is None?
val finalFoo: Option[Foo] = foo1.getOrElseOption(foo2)
The above getOrElseOption does not exist obviously. I know we can do sth like this, but it is somewhat verbose and hard to understand:
foo1.map(Some(_)).getOrElse(foo2).
scala option partial-functions
edited Nov 19 '18 at 22:16
Andrey Tyukin
27.1k42349
asked Nov 19 '18 at 22:09
Yuchen ZhongYuchen Zhong
11.6k781127
Let's assume that we have an option foo1 and an option foo2:
val foo1: Option[Foo]
val foo2: Option[Foo]
Is there an operator/function that allows me to return the value of the foo2 when foo1 is None?
val finalFoo: Option[Foo] = foo1.getOrElseOption(foo2)
The above getOrElseOption does not exist obviously. I know we can do sth like this, but it is somewhat verbose and hard to understand:
foo1.map(Some(_)).getOrElse(foo2).
scala option partial-functions
scala option partial-functions
edited Nov 19 '18 at 22:16
Andrey Tyukin
27.1k42349
asked Nov 19 '18 at 22:09
Yuchen ZhongYuchen Zhong
11.6k781127
edited Nov 19 '18 at 22:16
Andrey Tyukin
27.1k42349
asked Nov 19 '18 at 22:09
Yuchen ZhongYuchen Zhong
11.6k781127
edited Nov 19 '18 at 22:16
Andrey Tyukin
27.1k42349
edited Nov 19 '18 at 22:16
Andrey Tyukin
27.1k42349
edited Nov 19 '18 at 22:16
Andrey Tyukin
27.1k42349
27.1k42349
asked Nov 19 '18 at 22:09
Yuchen ZhongYuchen Zhong
11.6k781127
asked Nov 19 '18 at 22:09
Yuchen ZhongYuchen Zhong
11.6k781127
asked Nov 19 '18 at 22:09
Yuchen ZhongYuchen Zhong
11.6k781127
11.6k781127
4
orElse
– Andrey Tyukin
Nov 19 '18 at 22:12
What aboutorElse?
– Luis Miguel Mejía Suárez
Nov 19 '18 at 22:12
add a comment |
4
orElse
– Andrey Tyukin
Nov 19 '18 at 22:12
What aboutorElse?
– Luis Miguel Mejía Suárez
Nov 19 '18 at 22:12
4
4
orElse
– Andrey Tyukin
Nov 19 '18 at 22:12
orElse
– Andrey Tyukin
Nov 19 '18 at 22:12
What about
orElse ?– Luis Miguel Mejía Suárez
Nov 19 '18 at 22:12
What about
orElse ?– Luis Miguel Mejía Suárez
Nov 19 '18 at 22:12
add a comment |
1 Answer
1
active
oldest
votes
Option works a bit like a partial function, so orElse will do what you want:
foo1 orElse foo2
answered Nov 19 '18 at 22:12
TimTim
4,7101317
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Option works a bit like a partial function, so orElse will do what you want:
foo1 orElse foo2
answered Nov 19 '18 at 22:12
TimTim
4,7101317
add a comment |
Option works a bit like a partial function, so orElse will do what you want:
foo1 orElse foo2
answered Nov 19 '18 at 22:12
TimTim
4,7101317
add a comment |
Option works a bit like a partial function, so orElse will do what you want:
foo1 orElse foo2
answered Nov 19 '18 at 22:12
TimTim
4,7101317
Option works a bit like a partial function, so orElse will do what you want:
foo1 orElse foo2
answered Nov 19 '18 at 22:12
TimTim
4,7101317
answered Nov 19 '18 at 22:12
TimTim
4,7101317
answered Nov 19 '18 at 22:12
TimTim
4,7101317
answered Nov 19 '18 at 22:12
TimTim
4,7101317
4,7101317
add a comment |
add a comment |
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4
orElse
– Andrey Tyukin
Nov 19 '18 at 22:12
What about
orElse?– Luis Miguel Mejía Suárez
Nov 19 '18 at 22:12