Kotlin2DArrays

First-class support for operations on 2D-Arrays in Kotlin

Update:

I just noticed that flatMap is a far more flexible and powerful solution, it makes this library completely redundant. in fact, don't even continue reading this file, head over to flatMap's documentation instead.

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Usage:

examples from 2048-OOP Game:

• matrix(row: Int, col: Int, itemFactory: (i: Int, j: Int) -> T): Array<Array>

val emptyMatrix = matrix<Tile>(4, 4) { i, j ->
    EmptyTile.apply { position = Position(i, j) }
    }

• Array<Array<*>>#asSequence2D:

private val filledPositions: MutableList<Position>
    get() = grid.asSequence2D()
            .filter { it !== EmptyTile }
            .map { it.position }
            .toMutableList()

• Array<Array<*>>#withIndex2D:

private val emptySpaces: List<Position>
    get() = grid.withIndex2D()
            .asSequence()
            .filter { it.value === EmptyTile }
            .map { Position(it.x, it.y) }
            .toList()

• Other supported operations/functions:

 - forEach2D(action: (T) -> Unit)
 - forEachIndexed2D(action: (i: Int, j: Int, T) -> Unit)

Dependency:

Add it in your root build.gradle at the end of repositories:

allprojects {
    repositories {
    ...
    maven { url 'https://jitpack.io' }
    }
}

Add the dependency:

dependencies {
    implementation 'com.github.mhashim6:Kotlin2DArrays:1.0.1'
}