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Challenges Coat of Many Colours

Scala, 119 bytes Saved 26 bytes after porting Moshi's solution! _ sortBy("y gree br sc bla oc pe rub ol v f li go ch m cre c s ro a l ru g pu w p o b"split " "indexWhere _.startsWith) Original...

posted 3y ago by user‭  ·  edited 3y ago by user‭

Answer
#7: Post edited by user avatar user‭ · 2021-08-31T00:19:43Z (about 3 years ago)
  • # Scala, <s>145</s> 130 bytes
  • Saved 15 bytes after looking at [Moshi](https://codegolf.codidact.com/users/53196)'s [solution](https://codegolf.codidact.com/posts/283376/283383#answer-283383)!
  • ```scala
  • _ sortBy("d,ll,ee,ow,ar,ack,h,ac,b,iv,ol,w,la,ld,o,uv,ea,im,l,se,ur,m,s,e,r,i,n,a,u"split ","indexWhere _.substring(2).startsWith)
  • ```
  • [Try it in Scastie!](https://scastie.scala-lang.org/n8cyjLAVRjy3wAso4yQTrQ)
  • It turns out that after dropping the first 2 letters, the first 2 letters after that (and in some cases 1 or 3) are enough to identify colors.
  • ```scala
  • _ sortBy( //Sort the input by this function:
  • "..." //Take the comma separated string of colors
  • .split(",") //Split on commas
  • indexWhere //And find the index where
  • _.substring(2) //The current string with the 1st 2 chars removed
  • .startsWith //Starts with that color prefix
  • )
  • ```
  • # Scala, 119 bytes
  • Saved 26 bytes after porting [Moshi](https://codegolf.codidact.com/users/53196)'s [solution](https://codegolf.codidact.com/posts/283376/283383#answer-283383)!
  • ```scala
  • _ sortBy("y gree br sc bla oc pe rub ol v f li go ch m cre c s ro a l ru g pu w p o b"split " "indexWhere _.startsWith)
  • ```
  • ## Original solution, <s>145</s> 130 bytes
  • Saved 15 bytes after looking at [Moshi](https://codegolf.codidact.com/users/53196)'s [solution](https://codegolf.codidact.com/posts/283376/283383#answer-283383)!
  • ```scala
  • _ sortBy("d,ll,ee,ow,ar,ack,h,ac,b,iv,ol,w,la,ld,o,uv,ea,im,l,se,ur,m,s,e,r,i,n,a,u"split ","indexWhere _.substring(2).startsWith)
  • ```
  • [Try it in Scastie!](https://scastie.scala-lang.org/n8cyjLAVRjy3wAso4yQTrQ)
  • It turns out that after dropping the first 2 letters, the first 2 letters after that (and in some cases 1 or 3) are enough to identify colors.
  • ```scala
  • _ sortBy( //Sort the input by this function:
  • "..." //Take the comma separated string of colors
  • .split(",") //Split on commas
  • indexWhere //And find the index where
  • _.substring(2) //The current string with the 1st 2 chars removed
  • .startsWith //Starts with that color prefix
  • )
  • ```
#6: Post edited by user avatar user‭ · 2021-08-31T00:08:45Z (about 3 years ago)
  • # Scala, 145 bytes
  • ```scala
  • _ sortBy("d,ll,ee,ow,ar,ack,hr,ach,b,iv,ol,wn,la,ld,oco,uve,eam,im,lv,se,ur,m,ss,ey,rp,it,nk,an,ue"split ","indexWhere _.substring(2).startsWith)
  • ```
  • [Try it in Scastie!](https://scastie.scala-lang.org/lNNNJjFhRo2XLVVrBNWhxA)
  • It turns out that after dropping the first 2 letters, the first 2 letters after that (and in some cases 1 or 3) are enough to identify colors.
  • ```scala
  • _ sortBy( //Sort the input by this function:
  • "..." //Take the comma separated string of colors
  • .split(",") //Split on commas
  • indexWhere //And find the index where
  • _.substring(2) //The current string with the 1st 2 chars removed
  • .startsWith //Starts with that color prefix
  • )
  • ```
  • # Scala, <s>145</s> 130 bytes
  • Saved 15 bytes after looking at [Moshi](https://codegolf.codidact.com/users/53196)'s [solution](https://codegolf.codidact.com/posts/283376/283383#answer-283383)!
  • ```scala
  • _ sortBy("d,ll,ee,ow,ar,ack,h,ac,b,iv,ol,w,la,ld,o,uv,ea,im,l,se,ur,m,s,e,r,i,n,a,u"split ","indexWhere _.substring(2).startsWith)
  • ```
  • [Try it in Scastie!](https://scastie.scala-lang.org/n8cyjLAVRjy3wAso4yQTrQ)
  • It turns out that after dropping the first 2 letters, the first 2 letters after that (and in some cases 1 or 3) are enough to identify colors.
  • ```scala
  • _ sortBy( //Sort the input by this function:
  • "..." //Take the comma separated string of colors
  • .split(",") //Split on commas
  • indexWhere //And find the index where
  • _.substring(2) //The current string with the 1st 2 chars removed
  • .startsWith //Starts with that color prefix
  • )
  • ```
#5: Post edited by user avatar user‭ · 2021-08-13T23:22:12Z (over 3 years ago)
  • # Scala, 145 bytes
  • ```scala
  • _ sortBy("d,ll,ee,ow,ar,ack,hr,ach,b,iv,ol,wn,la,ld,oco,uve,eam,im,lv,se,ur,m,ss,ey,rp,it,nk,an,ue"split ","indexWhere _.substring(2).startsWith)
  • ```
  • [Try it in Scastie!](https://scastie.scala-lang.org/lNNNJjFhRo2XLVVrBNWhxA)
  • ```scala
  • _ sortBy( //Sort the input by this function:
  • "..." //Take the comma separated string of colors
  • .split(",") //Split on commas
  • indexWhere //And find the index where
  • _.substring(2) //The current string with the 1st 2 chars removed
  • .startsWith //Starts with that color prefix
  • )
  • ```
  • # Scala, 145 bytes
  • ```scala
  • _ sortBy("d,ll,ee,ow,ar,ack,hr,ach,b,iv,ol,wn,la,ld,oco,uve,eam,im,lv,se,ur,m,ss,ey,rp,it,nk,an,ue"split ","indexWhere _.substring(2).startsWith)
  • ```
  • [Try it in Scastie!](https://scastie.scala-lang.org/lNNNJjFhRo2XLVVrBNWhxA)
  • It turns out that after dropping the first 2 letters, the first 2 letters after that (and in some cases 1 or 3) are enough to identify colors.
  • ```scala
  • _ sortBy( //Sort the input by this function:
  • "..." //Take the comma separated string of colors
  • .split(",") //Split on commas
  • indexWhere //And find the index where
  • _.substring(2) //The current string with the 1st 2 chars removed
  • .startsWith //Starts with that color prefix
  • )
  • ```
#4: Post edited by user avatar user‭ · 2021-08-13T23:21:07Z (over 3 years ago)
  • # Scala, 171 bytes
  • ```scala
  • _ sortBy("d,llow,een,own,arlet,ack,hre,ach,by,ive,olet,wn,lac,ld,ocolate,uve,eam,imson,lver,se,ure,mon,sset,ey,rple,ite,nk,ange,ue".split(",")indexWhere _.substring(2).==)
  • ```
  • [Try it in Scastie!](https://scastie.scala-lang.org/agliQBgdRTGjkJcOvDLRaQ)
  • ```scala
  • _ sortBy( //Sort the input by this function:
  • "..." //Take the comma separated string of colors
  • .split(",") //Split on commas
  • indexWhere //And find the index of
  • _.substring(2).== //The current string with the 1st 2 chars removed
  • )
  • ```
  • # Scala, 145 bytes
  • ```scala
  • _ sortBy("d,ll,ee,ow,ar,ack,hr,ach,b,iv,ol,wn,la,ld,oco,uve,eam,im,lv,se,ur,m,ss,ey,rp,it,nk,an,ue"split ","indexWhere _.substring(2).startsWith)
  • ```
  • [Try it in Scastie!](https://scastie.scala-lang.org/lNNNJjFhRo2XLVVrBNWhxA)
  • ```scala
  • _ sortBy( //Sort the input by this function:
  • "..." //Take the comma separated string of colors
  • .split(",") //Split on commas
  • indexWhere //And find the index where
  • _.substring(2) //The current string with the 1st 2 chars removed
  • .startsWith //Starts with that color prefix
  • )
  • ```
#3: Post edited by user avatar user‭ · 2021-08-13T23:09:46Z (over 3 years ago)
  • # Scala, 171 bytes
  • ```scala
  • _ sortBy("d,llow,een,own,arlet,ack,hre,ach,by,ive,olet,wn,lac,ld,ocolate,uve,eam,imson,lver,se,ure,mon,sset,ey,rple,ite,nk,ange,ue".split(",")indexWhere _.substring(2).==)
  • ```
  • [Try it in Scastie!](https://scastie.scala-lang.org/agliQBgdRTGjkJcOvDLRaQ)
  • Explanation coming soon.
  • # Scala, 171 bytes
  • ```scala
  • _ sortBy("d,llow,een,own,arlet,ack,hre,ach,by,ive,olet,wn,lac,ld,ocolate,uve,eam,imson,lver,se,ure,mon,sset,ey,rple,ite,nk,ange,ue".split(",")indexWhere _.substring(2).==)
  • ```
  • [Try it in Scastie!](https://scastie.scala-lang.org/agliQBgdRTGjkJcOvDLRaQ)
  • ```scala
  • _ sortBy( //Sort the input by this function:
  • "..." //Take the comma separated string of colors
  • .split(",") //Split on commas
  • indexWhere //And find the index of
  • _.substring(2).== //The current string with the 1st 2 chars removed
  • )
  • ```
#2: Post edited by user avatar user‭ · 2021-08-13T23:07:41Z (over 3 years ago)
  • # Scala, 198 bytes
  • ```scala
  • "red,yellow,green,brown,scarlet,black,ochre,peach,ruby,olive,violet,fawn,lilac,gold,chocolate,mauve,cream,crimson,silver,rose,azure,lemon,russet,grey,purple,white,pink,orange,blue" split ","filter _
  • ```
  • [Try it in Scastie!](https://scastie.scala-lang.org/r6aoA9GAQGW2dzZCBpkgxw)
  • Very simple.
  • # Scala, 171 bytes
  • ```scala
  • _ sortBy("d,llow,een,own,arlet,ack,hre,ach,by,ive,olet,wn,lac,ld,ocolate,uve,eam,imson,lver,se,ure,mon,sset,ey,rple,ite,nk,ange,ue".split(",")indexWhere _.substring(2).==)
  • ```
  • [Try it in Scastie!](https://scastie.scala-lang.org/agliQBgdRTGjkJcOvDLRaQ)
  • Explanation coming soon.
#1: Initial revision by user avatar user‭ · 2021-08-13T22:59:20Z (over 3 years ago) 
# Scala, 198 bytes

```scala
"red,yellow,green,brown,scarlet,black,ochre,peach,ruby,olive,violet,fawn,lilac,gold,chocolate,mauve,cream,crimson,silver,rose,azure,lemon,russet,grey,purple,white,pink,orange,blue" split ","filter _
```
[Try it in Scastie!](https://scastie.scala-lang.org/r6aoA9GAQGW2dzZCBpkgxw)

Very simple.