Suggestion: `ClosedRange<T>.mapBounds()`
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# stdlibm
Marc Knaup
12/17/2020, 2:49 PMSuggestion:
ClosedRange<T>.mapBounds() Copy code
val range = 1 .. 10
val shiftedRange = range.mapBounds { it + 10 } // = 11 .. 20
val characters = "a" .. "z"
val uppercaseCharacters = characters.mapBounds { it.toUpperCase() } // == "A" .. "Z" Copy code
fun <T : Comparable<T>, R : Comparable<R>> ClosedRange<T>.mapBounds(transform: (T) -> R): ClosedRange<R> =
transform(start) .. transform(endInclusive)
// plus overloads for primitive rangesMarc Knaup
12/17/2020, 3:09 PMNote that due to KT-43981 this cannot be properly implemented at the moment for primitive boundary-producing transformations as it would break the generic case:
https://youtrack.jetbrains.com/issue/KT-43981
a
Astronaut4449
12/25/2020, 5:35 PMHow about
mapUpperBoundmapLowerBoundmapBoundsm
Marc Knaup
12/25/2020, 5:50 PMA pair of what?
a
Astronaut4449
12/25/2020, 5:51 PMA pair of ints or chars. Depending on your generic type.
m
Marc Knaup
12/25/2020, 5:55 PMI want to map both ends of the range with a single function. No
Paira
Astronaut4449
12/25/2020, 5:55 PMAh sorry. My fault
m
Marc Knaup
12/25/2020, 5:56 PMNo worries, thanks for trying to help :)
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