arrow-core-data / arrow.core / kotlin.sequences.Sequence / padZip

padZip

fun <A, B> Sequence<A>.padZip(other: Sequence<B>): Sequence<Pair<A?, B?>>

Returns a SequencePairA?,B? containing the zipped values of the two sequences with null for padding.

Example:

import arrow.core.padZip

//sampleStart
val padRight = sequenceOf(1, 2).padZip(sequenceOf("a"))       // Result: [Pair(1, "a"), Pair(2, null)]
val padLeft = sequenceOf(1).padZip(sequenceOf("a", "b"))      // Result: [Pair(1, "a"), Pair(null, "b")]
val noPadding = sequenceOf(1, 2).padZip(sequenceOf("a", "b")) // Result: [Pair(1, "a"), Pair(2, "b")]
//sampleEnd

fun main() {
  println("padRight = $padRight")
  println("padLeft = $padLeft")
  println("noPadding = $noPadding")
}

fun <A, B, C> Sequence<A>.padZip(other: Sequence<B>, fa: (A?, B?) -> C): Sequence<C>

Returns a Sequence containing the result of applying some transformation (A?, B?) -> C on a zip.

Example:

import arrow.core.padZip

//sampleStart
val padZipRight = sequenceOf(1, 2).padZip(sequenceOf(3)) { l, r -> (l?:0) + (r?:0) }  // Result: [4, 2]
val padZipLeft = sequenceOf(1).padZip(sequenceOf(3, 4)) { l, r -> (l?:0) + (r?:0) }   // Result: [4, 4]
val noPadding = sequenceOf(1, 2).padZip(sequenceOf(3, 4)) { l, r -> (l?:0) + (r?:0) } // Result: [4, 6]
//sampleEnd

fun main() {
  println("padZipRight = $padZipRight")
  println("padZipLeft = $padZipLeft")
  println("noPadding = $noPadding")
}