Scala - functional methods - expected NotInferedA
I have to Strings which represent two html site contents. I want to remove whitespaces and comments, compute Levenshtein distance between them and on that basis I want to decide wether they are similiar or not.
I created functions:
val removeWhiteSpacesAndHtmlComments: String => String = _.replaceAll("\s+","\s").replaceAll("<!--.*?-->","")
val prepareContents: (String,String) => (String,String) = (s1,s2) => (removeWhiteSpacesAndHtmlComments.apply(s1), removeWhiteSpacesAndHtmlComments(s2))
val computeLevenshteinDistance:(String,String) => Int = StringUtils.getLevenshteinDistance(_,_)
val areContentsSimilarEnough: Int => Boolean = _ <= 50
I want to combine all those functions into a flow:
val isHtmlContentChanged: (String,String) => Boolean = prepareContents.tupled andThen computeLevenshteinDistance andThen areContentsSimilarEnough
Unfortunately over the computeLevenshteinDistance part I get exception:
Type mismatch, expected: (String,String) => NotInferedA, actual: (String,String)=>Int
How to solve this ?
scala
asked Nov 14 '18 at 16:21
Clyde BarrowClyde Barrow
1019
add a comment |
I have to Strings which represent two html site contents. I want to remove whitespaces and comments, compute Levenshtein distance between them and on that basis I want to decide wether they are similiar or not.
I created functions:
val removeWhiteSpacesAndHtmlComments: String => String = _.replaceAll("\s+","\s").replaceAll("<!--.*?-->","")
val prepareContents: (String,String) => (String,String) = (s1,s2) => (removeWhiteSpacesAndHtmlComments.apply(s1), removeWhiteSpacesAndHtmlComments(s2))
val computeLevenshteinDistance:(String,String) => Int = StringUtils.getLevenshteinDistance(_,_)
val areContentsSimilarEnough: Int => Boolean = _ <= 50
I want to combine all those functions into a flow:
val isHtmlContentChanged: (String,String) => Boolean = prepareContents.tupled andThen computeLevenshteinDistance andThen areContentsSimilarEnough
Unfortunately over the computeLevenshteinDistance part I get exception:
Type mismatch, expected: (String,String) => NotInferedA, actual: (String,String)=>Int
How to solve this ?
scala
asked Nov 14 '18 at 16:21
Clyde BarrowClyde Barrow
1019
1
I believe you just forgot the .tupled on computeLevenshteinDistance
– C4stor
Nov 14 '18 at 16:34
add a comment |
I have to Strings which represent two html site contents. I want to remove whitespaces and comments, compute Levenshtein distance between them and on that basis I want to decide wether they are similiar or not.
I created functions:
val removeWhiteSpacesAndHtmlComments: String => String = _.replaceAll("\s+","\s").replaceAll("<!--.*?-->","")
val prepareContents: (String,String) => (String,String) = (s1,s2) => (removeWhiteSpacesAndHtmlComments.apply(s1), removeWhiteSpacesAndHtmlComments(s2))
val computeLevenshteinDistance:(String,String) => Int = StringUtils.getLevenshteinDistance(_,_)
val areContentsSimilarEnough: Int => Boolean = _ <= 50
I want to combine all those functions into a flow:
val isHtmlContentChanged: (String,String) => Boolean = prepareContents.tupled andThen computeLevenshteinDistance andThen areContentsSimilarEnough
Unfortunately over the computeLevenshteinDistance part I get exception:
Type mismatch, expected: (String,String) => NotInferedA, actual: (String,String)=>Int
How to solve this ?
scala
asked Nov 14 '18 at 16:21
Clyde BarrowClyde Barrow
1019
I have to Strings which represent two html site contents. I want to remove whitespaces and comments, compute Levenshtein distance between them and on that basis I want to decide wether they are similiar or not.
I created functions:
val removeWhiteSpacesAndHtmlComments: String => String = _.replaceAll("\s+","\s").replaceAll("<!--.*?-->","")
val prepareContents: (String,String) => (String,String) = (s1,s2) => (removeWhiteSpacesAndHtmlComments.apply(s1), removeWhiteSpacesAndHtmlComments(s2))
val computeLevenshteinDistance:(String,String) => Int = StringUtils.getLevenshteinDistance(_,_)
val areContentsSimilarEnough: Int => Boolean = _ <= 50
I want to combine all those functions into a flow:
val isHtmlContentChanged: (String,String) => Boolean = prepareContents.tupled andThen computeLevenshteinDistance andThen areContentsSimilarEnough
Unfortunately over the computeLevenshteinDistance part I get exception:
Type mismatch, expected: (String,String) => NotInferedA, actual: (String,String)=>Int
How to solve this ?
scala
scala
asked Nov 14 '18 at 16:21
Clyde BarrowClyde Barrow
1019
asked Nov 14 '18 at 16:21
Clyde BarrowClyde Barrow
1019
asked Nov 14 '18 at 16:21
Clyde BarrowClyde Barrow
1019
asked Nov 14 '18 at 16:21
Clyde BarrowClyde Barrow
1019
asked Nov 14 '18 at 16:21
Clyde BarrowClyde Barrow
1019
1019
1
I believe you just forgot the .tupled on computeLevenshteinDistance
– C4stor
Nov 14 '18 at 16:34
add a comment |
1
I believe you just forgot the .tupled on computeLevenshteinDistance
– C4stor
Nov 14 '18 at 16:34
1
1
I believe you just forgot the .tupled on computeLevenshteinDistance
– C4stor
Nov 14 '18 at 16:34
I believe you just forgot the .tupled on computeLevenshteinDistance
– C4stor
Nov 14 '18 at 16:34
add a comment |
1 Answer
1
active
oldest
votes
Add .tupled to computeLevenshteinDistance.
Try it out!
answered Nov 14 '18 at 16:57
Markus AppelMarkus Appel
907220
add a comment |
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1 Answer
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Add .tupled to computeLevenshteinDistance.
Try it out!
answered Nov 14 '18 at 16:57
Markus AppelMarkus Appel
907220
add a comment |
Add .tupled to computeLevenshteinDistance.
Try it out!
answered Nov 14 '18 at 16:57
Markus AppelMarkus Appel
907220
add a comment |
Add .tupled to computeLevenshteinDistance.
Try it out!
answered Nov 14 '18 at 16:57
Markus AppelMarkus Appel
907220
Add .tupled to computeLevenshteinDistance.
Try it out!
answered Nov 14 '18 at 16:57
Markus AppelMarkus Appel
907220
answered Nov 14 '18 at 16:57
Markus AppelMarkus Appel
907220
answered Nov 14 '18 at 16:57
Markus AppelMarkus Appel
907220
answered Nov 14 '18 at 16:57
Markus AppelMarkus Appel
907220
907220
add a comment |
add a comment |
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1
I believe you just forgot the .tupled on computeLevenshteinDistance
– C4stor
Nov 14 '18 at 16:34