Haskell join function inputs in list in specific order
Exercise
Hello every one!
I have been struggling to get this function working in the specific way they want.
I tried everything and the only output I could make was without the starting and ending point, eg: [((a,b),(b,c))]
Could someone please give me some help? I am stucked...
Update: type Point = (Float, Float)
haskell
asked Nov 20 '18 at 23:58
KryzekKryzek
14
add a comment |
Exercise
Hello every one!
I have been struggling to get this function working in the specific way they want.
I tried everything and the only output I could make was without the starting and ending point, eg: [((a,b),(b,c))]
Could someone please give me some help? I am stucked...
Update: type Point = (Float, Float)
haskell
asked Nov 20 '18 at 23:58
KryzekKryzek
14
3
Could you show what you've tried? That should give us a better idea of exactly what part you're having trouble with.
– DarthFennec
Nov 21 '18 at 0:31
1
please narrow down your problem. How far do you get on your own and where exactly do you need help? We are not starting to just randomly solve everyones homework...
– Jere
Nov 21 '18 at 1:53
@Jere I got the hint I needed! The only thing missing was joining first and second input to the beginning and ending respectively. Thanks for the interest!
– Kryzek
Nov 21 '18 at 12:22
add a comment |
Exercise
Hello every one!
I have been struggling to get this function working in the specific way they want.
I tried everything and the only output I could make was without the starting and ending point, eg: [((a,b),(b,c))]
Could someone please give me some help? I am stucked...
Update: type Point = (Float, Float)
haskell
asked Nov 20 '18 at 23:58
KryzekKryzek
14
Exercise
Hello every one!
I have been struggling to get this function working in the specific way they want.
I tried everything and the only output I could make was without the starting and ending point, eg: [((a,b),(b,c))]
Could someone please give me some help? I am stucked...
Update: type Point = (Float, Float)
haskell
haskell
asked Nov 20 '18 at 23:58
KryzekKryzek
14
asked Nov 20 '18 at 23:58
KryzekKryzek
14
edited Nov 21 '18 at 12:37
Kryzek
asked Nov 20 '18 at 23:58
KryzekKryzek
14
asked Nov 20 '18 at 23:58
KryzekKryzek
14
asked Nov 20 '18 at 23:58
KryzekKryzek
14
14
3
Could you show what you've tried? That should give us a better idea of exactly what part you're having trouble with.
– DarthFennec
Nov 21 '18 at 0:31
1
please narrow down your problem. How far do you get on your own and where exactly do you need help? We are not starting to just randomly solve everyones homework...
– Jere
Nov 21 '18 at 1:53
@Jere I got the hint I needed! The only thing missing was joining first and second input to the beginning and ending respectively. Thanks for the interest!
– Kryzek
Nov 21 '18 at 12:22
add a comment |
3
Could you show what you've tried? That should give us a better idea of exactly what part you're having trouble with.
– DarthFennec
Nov 21 '18 at 0:31
1
please narrow down your problem. How far do you get on your own and where exactly do you need help? We are not starting to just randomly solve everyones homework...
– Jere
Nov 21 '18 at 1:53
@Jere I got the hint I needed! The only thing missing was joining first and second input to the beginning and ending respectively. Thanks for the interest!
– Kryzek
Nov 21 '18 at 12:22
3
3
Could you show what you've tried? That should give us a better idea of exactly what part you're having trouble with.
– DarthFennec
Nov 21 '18 at 0:31
Could you show what you've tried? That should give us a better idea of exactly what part you're having trouble with.
– DarthFennec
Nov 21 '18 at 0:31
1
1
please narrow down your problem. How far do you get on your own and where exactly do you need help? We are not starting to just randomly solve everyones homework...
– Jere
Nov 21 '18 at 1:53
please narrow down your problem. How far do you get on your own and where exactly do you need help? We are not starting to just randomly solve everyones homework...
– Jere
Nov 21 '18 at 1:53
@Jere I got the hint I needed! The only thing missing was joining first and second input to the beginning and ending respectively. Thanks for the interest!
– Kryzek
Nov 21 '18 at 12:22
@Jere I got the hint I needed! The only thing missing was joining first and second input to the beginning and ending respectively. Thanks for the interest!
– Kryzek
Nov 21 '18 at 12:22
add a comment |
1 Answer
1
active
oldest
votes
Well since you got it working without the starting/ending point. An easy way to complete would be use your function but add the starting/ending point in the list in an inner function. So your interface is still same.
Another way using recursion, pattern matching and guards is:
-- assuming the inputs to be int as definition of point not given
solve x z = [(x,z)]
solve x z (y:ys)
| x == 0 = solve y z ys -- x ==0 to be replaced by null/empty condition on x
| null ys && z == 0 = -- z ==0 to be replaced by null/empty condition on z
| null ys = [(y, z)]
| otherwise = (x,y) : solve y z ys
Added a base case when the list is empty or start/end points not valid based on darthfennec comment.
answered Nov 21 '18 at 0:42
peeyush singhpeeyush singh
509313
That base case doesn't look quite right. I don't think you should be ignoringx.
– DarthFennec
Nov 21 '18 at 0:50
I forgot to include, the Point is: type Point = (Float, Float) I am trying now your solutions and thank you for a quick reply!!
– Kryzek
Nov 21 '18 at 12:17
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
Well since you got it working without the starting/ending point. An easy way to complete would be use your function but add the starting/ending point in the list in an inner function. So your interface is still same.
Another way using recursion, pattern matching and guards is:
-- assuming the inputs to be int as definition of point not given
solve x z = [(x,z)]
solve x z (y:ys)
| x == 0 = solve y z ys -- x ==0 to be replaced by null/empty condition on x
| null ys && z == 0 = -- z ==0 to be replaced by null/empty condition on z
| null ys = [(y, z)]
| otherwise = (x,y) : solve y z ys
Added a base case when the list is empty or start/end points not valid based on darthfennec comment.
answered Nov 21 '18 at 0:42
peeyush singhpeeyush singh
509313
That base case doesn't look quite right. I don't think you should be ignoringx.
– DarthFennec
Nov 21 '18 at 0:50
I forgot to include, the Point is: type Point = (Float, Float) I am trying now your solutions and thank you for a quick reply!!
– Kryzek
Nov 21 '18 at 12:17
add a comment |
Well since you got it working without the starting/ending point. An easy way to complete would be use your function but add the starting/ending point in the list in an inner function. So your interface is still same.
Another way using recursion, pattern matching and guards is:
-- assuming the inputs to be int as definition of point not given
solve x z = [(x,z)]
solve x z (y:ys)
| x == 0 = solve y z ys -- x ==0 to be replaced by null/empty condition on x
| null ys && z == 0 = -- z ==0 to be replaced by null/empty condition on z
| null ys = [(y, z)]
| otherwise = (x,y) : solve y z ys
Added a base case when the list is empty or start/end points not valid based on darthfennec comment.
answered Nov 21 '18 at 0:42
peeyush singhpeeyush singh
509313
That base case doesn't look quite right. I don't think you should be ignoringx.
– DarthFennec
Nov 21 '18 at 0:50
I forgot to include, the Point is: type Point = (Float, Float) I am trying now your solutions and thank you for a quick reply!!
– Kryzek
Nov 21 '18 at 12:17
add a comment |
Well since you got it working without the starting/ending point. An easy way to complete would be use your function but add the starting/ending point in the list in an inner function. So your interface is still same.
Another way using recursion, pattern matching and guards is:
-- assuming the inputs to be int as definition of point not given
solve x z = [(x,z)]
solve x z (y:ys)
| x == 0 = solve y z ys -- x ==0 to be replaced by null/empty condition on x
| null ys && z == 0 = -- z ==0 to be replaced by null/empty condition on z
| null ys = [(y, z)]
| otherwise = (x,y) : solve y z ys
Added a base case when the list is empty or start/end points not valid based on darthfennec comment.
answered Nov 21 '18 at 0:42
peeyush singhpeeyush singh
509313
Well since you got it working without the starting/ending point. An easy way to complete would be use your function but add the starting/ending point in the list in an inner function. So your interface is still same.
Another way using recursion, pattern matching and guards is:
-- assuming the inputs to be int as definition of point not given
solve x z = [(x,z)]
solve x z (y:ys)
| x == 0 = solve y z ys -- x ==0 to be replaced by null/empty condition on x
| null ys && z == 0 = -- z ==0 to be replaced by null/empty condition on z
| null ys = [(y, z)]
| otherwise = (x,y) : solve y z ys
Added a base case when the list is empty or start/end points not valid based on darthfennec comment.
answered Nov 21 '18 at 0:42
peeyush singhpeeyush singh
509313
edited Nov 21 '18 at 1:06
answered Nov 21 '18 at 0:42
peeyush singhpeeyush singh
509313
answered Nov 21 '18 at 0:42
peeyush singhpeeyush singh
509313
answered Nov 21 '18 at 0:42
peeyush singhpeeyush singh
509313
509313
That base case doesn't look quite right. I don't think you should be ignoringx.
– DarthFennec
Nov 21 '18 at 0:50
I forgot to include, the Point is: type Point = (Float, Float) I am trying now your solutions and thank you for a quick reply!!
– Kryzek
Nov 21 '18 at 12:17
add a comment |
That base case doesn't look quite right. I don't think you should be ignoringx.
– DarthFennec
Nov 21 '18 at 0:50
I forgot to include, the Point is: type Point = (Float, Float) I am trying now your solutions and thank you for a quick reply!!
– Kryzek
Nov 21 '18 at 12:17
That base case doesn't look quite right. I don't think you should be ignoring
x.– DarthFennec
Nov 21 '18 at 0:50
That base case doesn't look quite right. I don't think you should be ignoring
x.– DarthFennec
Nov 21 '18 at 0:50
I forgot to include, the Point is: type Point = (Float, Float) I am trying now your solutions and thank you for a quick reply!!
– Kryzek
Nov 21 '18 at 12:17
I forgot to include, the Point is: type Point = (Float, Float) I am trying now your solutions and thank you for a quick reply!!
– Kryzek
Nov 21 '18 at 12:17
add a comment |
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3
Could you show what you've tried? That should give us a better idea of exactly what part you're having trouble with.
– DarthFennec
Nov 21 '18 at 0:31
1
please narrow down your problem. How far do you get on your own and where exactly do you need help? We are not starting to just randomly solve everyones homework...
– Jere
Nov 21 '18 at 1:53
@Jere I got the hint I needed! The only thing missing was joining first and second input to the beginning and ending respectively. Thanks for the interest!
– Kryzek
Nov 21 '18 at 12:22