Scala .init method example
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0
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Can you please explain what init method performs with respect to below list
i can see the result of new list says that last sequence is being omitted from the existing list.
val numbers = List(1, 2, 3, 4, 5)
val result = numbers.init
println(result)
scala
edited Nov 10 at 12:36
Amit Prasad
502313
asked Nov 9 at 22:07
Balaji Krishnamoorthy
12
add a comment |
up vote
0
down vote
favorite
Can you please explain what init method performs with respect to below list
i can see the result of new list says that last sequence is being omitted from the existing list.
val numbers = List(1, 2, 3, 4, 5)
val result = numbers.init
println(result)
scala
edited Nov 10 at 12:36
Amit Prasad
502313
asked Nov 9 at 22:07
Balaji Krishnamoorthy
12
scala-lang.org/api/2.12.6/scala/collection/immutable/List.html.
– Alexey Romanov
Nov 10 at 12:42
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
Can you please explain what init method performs with respect to below list
i can see the result of new list says that last sequence is being omitted from the existing list.
val numbers = List(1, 2, 3, 4, 5)
val result = numbers.init
println(result)
scala
edited Nov 10 at 12:36
Amit Prasad
502313
asked Nov 9 at 22:07
Balaji Krishnamoorthy
12
Can you please explain what init method performs with respect to below list
i can see the result of new list says that last sequence is being omitted from the existing list.
val numbers = List(1, 2, 3, 4, 5)
val result = numbers.init
println(result)
scala
scala
edited Nov 10 at 12:36
Amit Prasad
502313
asked Nov 9 at 22:07
Balaji Krishnamoorthy
12
edited Nov 10 at 12:36
Amit Prasad
502313
asked Nov 9 at 22:07
Balaji Krishnamoorthy
12
edited Nov 10 at 12:36
Amit Prasad
502313
edited Nov 10 at 12:36
Amit Prasad
502313
edited Nov 10 at 12:36
Amit Prasad
502313
502313
asked Nov 9 at 22:07
Balaji Krishnamoorthy
12
asked Nov 9 at 22:07
Balaji Krishnamoorthy
12
asked Nov 9 at 22:07
Balaji Krishnamoorthy
12
12
scala-lang.org/api/2.12.6/scala/collection/immutable/List.html.
– Alexey Romanov
Nov 10 at 12:42
add a comment |
scala-lang.org/api/2.12.6/scala/collection/immutable/List.html.
– Alexey Romanov
Nov 10 at 12:42
scala-lang.org/api/2.12.6/scala/collection/immutable/List.html.
– Alexey Romanov
Nov 10 at 12:42
scala-lang.org/api/2.12.6/scala/collection/immutable/List.html.
– Alexey Romanov
Nov 10 at 12:42
add a comment |
3 Answers
3
active
oldest
votes
up vote
2
down vote
.init and .last are the compliments to the .head and .tail methods.
val nums = List(1,2,3,4)
nums.head //res0: Int = 1
nums.tail //res1: List[Int] = List(2, 3, 4)
nums.init //res2: List[Int] = List(1, 2, 3)
nums.last //res3: Int = 4
answered Nov 9 at 22:21
jwvh
24.9k52038
add a comment |
up vote
1
down vote
def init: List[A] which selects all elements except the last.
l: List[Int] = List(1, 2, 3, 4, 5, 6, 7, 8)
scala> l.last
res58: Int = 8
scala> l.init
res59: List[Int] = List(1, 2, 3, 4, 5, 6, 7)
answered Nov 10 at 8:39
Amit Prasad
502313
add a comment |
up vote
0
down vote
scala> val testList = List(1,2,3,4,5)
testList: List[Int] = List(1, 2, 3, 4, 5)
scala> testList.init
res0: List[Int] = List(1, 2, 3, 4)
scala> testList.last
res1: Int = 5
scala> testList.head
res2: Int = 1
scala> testList.tail
res3: List[Int] = List(2, 3, 4, 5)
answered Nov 10 at 2:00
KP M
8910
add a comment |
3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
2
down vote
.init and .last are the compliments to the .head and .tail methods.
val nums = List(1,2,3,4)
nums.head //res0: Int = 1
nums.tail //res1: List[Int] = List(2, 3, 4)
nums.init //res2: List[Int] = List(1, 2, 3)
nums.last //res3: Int = 4
answered Nov 9 at 22:21
jwvh
24.9k52038
add a comment |
up vote
2
down vote
.init and .last are the compliments to the .head and .tail methods.
val nums = List(1,2,3,4)
nums.head //res0: Int = 1
nums.tail //res1: List[Int] = List(2, 3, 4)
nums.init //res2: List[Int] = List(1, 2, 3)
nums.last //res3: Int = 4
answered Nov 9 at 22:21
jwvh
24.9k52038
add a comment |
up vote
2
down vote
up vote
2
down vote
.init and .last are the compliments to the .head and .tail methods.
val nums = List(1,2,3,4)
nums.head //res0: Int = 1
nums.tail //res1: List[Int] = List(2, 3, 4)
nums.init //res2: List[Int] = List(1, 2, 3)
nums.last //res3: Int = 4
answered Nov 9 at 22:21
jwvh
24.9k52038
.init and .last are the compliments to the .head and .tail methods.
val nums = List(1,2,3,4)
nums.head //res0: Int = 1
nums.tail //res1: List[Int] = List(2, 3, 4)
nums.init //res2: List[Int] = List(1, 2, 3)
nums.last //res3: Int = 4
answered Nov 9 at 22:21
jwvh
24.9k52038
answered Nov 9 at 22:21
jwvh
24.9k52038
answered Nov 9 at 22:21
jwvh
24.9k52038
answered Nov 9 at 22:21
jwvh
24.9k52038
24.9k52038
add a comment |
add a comment |
up vote
1
down vote
def init: List[A] which selects all elements except the last.
l: List[Int] = List(1, 2, 3, 4, 5, 6, 7, 8)
scala> l.last
res58: Int = 8
scala> l.init
res59: List[Int] = List(1, 2, 3, 4, 5, 6, 7)
answered Nov 10 at 8:39
Amit Prasad
502313
add a comment |
up vote
1
down vote
def init: List[A] which selects all elements except the last.
l: List[Int] = List(1, 2, 3, 4, 5, 6, 7, 8)
scala> l.last
res58: Int = 8
scala> l.init
res59: List[Int] = List(1, 2, 3, 4, 5, 6, 7)
answered Nov 10 at 8:39
Amit Prasad
502313
add a comment |
up vote
1
down vote
up vote
1
down vote
def init: List[A] which selects all elements except the last.
l: List[Int] = List(1, 2, 3, 4, 5, 6, 7, 8)
scala> l.last
res58: Int = 8
scala> l.init
res59: List[Int] = List(1, 2, 3, 4, 5, 6, 7)
answered Nov 10 at 8:39
Amit Prasad
502313
def init: List[A] which selects all elements except the last.
l: List[Int] = List(1, 2, 3, 4, 5, 6, 7, 8)
scala> l.last
res58: Int = 8
scala> l.init
res59: List[Int] = List(1, 2, 3, 4, 5, 6, 7)
answered Nov 10 at 8:39
Amit Prasad
502313
answered Nov 10 at 8:39
Amit Prasad
502313
answered Nov 10 at 8:39
Amit Prasad
502313
answered Nov 10 at 8:39
Amit Prasad
502313
502313
add a comment |
add a comment |
up vote
0
down vote
scala> val testList = List(1,2,3,4,5)
testList: List[Int] = List(1, 2, 3, 4, 5)
scala> testList.init
res0: List[Int] = List(1, 2, 3, 4)
scala> testList.last
res1: Int = 5
scala> testList.head
res2: Int = 1
scala> testList.tail
res3: List[Int] = List(2, 3, 4, 5)
answered Nov 10 at 2:00
KP M
8910
add a comment |
up vote
0
down vote
scala> val testList = List(1,2,3,4,5)
testList: List[Int] = List(1, 2, 3, 4, 5)
scala> testList.init
res0: List[Int] = List(1, 2, 3, 4)
scala> testList.last
res1: Int = 5
scala> testList.head
res2: Int = 1
scala> testList.tail
res3: List[Int] = List(2, 3, 4, 5)
answered Nov 10 at 2:00
KP M
8910
add a comment |
up vote
0
down vote
up vote
0
down vote
scala> val testList = List(1,2,3,4,5)
testList: List[Int] = List(1, 2, 3, 4, 5)
scala> testList.init
res0: List[Int] = List(1, 2, 3, 4)
scala> testList.last
res1: Int = 5
scala> testList.head
res2: Int = 1
scala> testList.tail
res3: List[Int] = List(2, 3, 4, 5)
answered Nov 10 at 2:00
KP M
8910
scala> val testList = List(1,2,3,4,5)
testList: List[Int] = List(1, 2, 3, 4, 5)
scala> testList.init
res0: List[Int] = List(1, 2, 3, 4)
scala> testList.last
res1: Int = 5
scala> testList.head
res2: Int = 1
scala> testList.tail
res3: List[Int] = List(2, 3, 4, 5)
answered Nov 10 at 2:00
KP M
8910
answered Nov 10 at 2:00
KP M
8910
answered Nov 10 at 2:00
KP M
8910
answered Nov 10 at 2:00
KP M
8910
8910
add a comment |
add a comment |
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scala-lang.org/api/2.12.6/scala/collection/immutable/List.html.
– Alexey Romanov
Nov 10 at 12:42