kotlin-range-sets / com.github.jonpeterson.kotlin.ranges / RangeSet / retain

retain

fun retain(element: ClosedRange<T>): Boolean (source)

Removes all values from set except those contained in the specified range; intersection set logic.

Examples:

assert(IntRangeSet(listOf(5..21)).apply { retain(7..15) }.toList() == listOf(7..15))
assert(IntRangeSet(listOf(5..9, 13..21)).apply { retain(7..15) }.toList() == listOf(7..9, 13..15))
assert(IntRangeSet(listOf(5..9, 13..21)).apply { retain(2..25) }.toList() == listOf(5..9, 13..21))

Parameters

element - range of values to keep

Return
whether any values were removed