add pads and breakAsPairs extensions

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## 0.22.8
 
+* `Common`:
+  * Add `List.breakAsPairs` extension
+  * Add `Sequence.padWith`/`Sequence.padStart`/`Sequence.padEnd` and `List.padWith`/`List.padStart`/`List.padEnd` extensions
+
 ## 0.22.7
 
 * `Versions`:

common/src/commonMain/kotlin/dev/inmo/micro_utils/common/BreakAsPairs.kt

@@ -0,0 +1,13 @@
+package dev.inmo.micro_utils.common
+
+fun <T> List<T>.breakAsPairs(): List<Pair<T, T>> {
+    val result = mutableListOf<Pair<T, T>>()
+
+    for (i in 0 until size - 1) {
+        val first = get(i)
+        val second = get(i + 1)
+        result.add(first to second)
+    }
+
+    return result
+}

common/src/commonMain/kotlin/dev/inmo/micro_utils/common/PadExtensions.kt

@@ -0,0 +1,32 @@
+package dev.inmo.micro_utils.common
+
+inline fun <T> Sequence<T>.padWith(size: Int, inserter: (Sequence<T>) -> Sequence<T>): Sequence<T> {
+    var result = this
+    while (result.count() < size) {
+        result = inserter(result)
+    }
+    return result
+}
+
+inline fun <T> Sequence<T>.padEnd(size: Int, padBlock: (Int) -> T): Sequence<T> = padWith(size) { it + padBlock(it.count()) }
+
+inline fun <T> Sequence<T>.padEnd(size: Int, o: T) = padEnd(size) { o }
+
+inline fun <T> List<T>.padWith(size: Int, inserter: (List<T>) -> List<T>): List<T> {
+    var result = this
+    while (result.size < size) {
+        result = inserter(result)
+    }
+    return result
+}
+inline fun <T> List<T>.padEnd(size: Int, padBlock: (Int) -> T): List<T> = asSequence().padEnd(size, padBlock).toList()
+
+inline fun <T> List<T>.padEnd(size: Int, o: T): List<T> = asSequence().padEnd(size, o).toList()
+
+inline fun <T> Sequence<T>.padStart(size: Int, padBlock: (Int) -> T): Sequence<T> = padWith(size) { sequenceOf(padBlock(it.count())) + it }
+
+inline fun <T> Sequence<T>.padStart(size: Int, o: T) = padStart(size) { o }
+
+inline fun <T> List<T>.padStart(size: Int, padBlock: (Int) -> T): List<T> = asSequence().padStart(size, padBlock).toList()
+
+inline fun <T> List<T>.padStart(size: Int, o: T): List<T> = asSequence().padStart(size, o).toList()