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Photo by Elena Mozhvilo on Unsplash Photo by Markus Spiske on Unsplash
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2020 Unofficial Advent of Code Survey - Jeroen Heijmans
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Daniel Lin (@ephemient) Solved every daily puzzle in four different languages. ephemient.github.io/aoc2020/
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Joris Portegies Zwart (@jorispz) Solves puzzles using Kotlin Multiplatform. github.com/jorispz/aoc-2020
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Jakub Gwóźdź Solved every puzzle and provided a visualization. In Kotlin! jakubgwozdz.github.io/advent-of- code-2020/
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Courtesy of @FuriousProgramm @FuriousProgramm Also attempting to solve this puzzle. Manually.
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Since 2017, I have solved each puzzle each day, in Kotlin and blogged about it. https://todd.ginsberg.com
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val letters = listOf("A", "B", "C", "D") val numbers = listOf(1, 2, 3, 4)
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val letters = listOf("A", "B", "C", "D") val numbers = listOf(1, 2, 3, 4) letters.zip(numbers) // [(A, 1), (B, 2), (C, 3), (D, 4)] // List>
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val letters = listOf("A", "B", "C", "D")
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val letters = listOf("A", "B", "C", "D") letters.zipWithNext() // [(A, B), (B, C), (C, D)] // List>
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val letters = listOf("A", "B", "C", "D")
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val letters = listOf("A", "B", "C", "D") letters.chunked(2) // [[A, B], [C, D]] // List>
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val letters = listOf("A", "B", "C", "D", "E", "F")
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val letters = listOf("A", "B", "C", "D", "E", "F") letters.windowed(3) // [[A, B, C], [B, C, D], [C, D, E], [D, E, F]] // List>
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val letters = listOf("A", "B", "C", "D", "E", "F") letters.windowed(3, 3) // [[A, B, C], [D, E, F]]
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val letters = listOf("A", "B", "C", "D", "E", "F") letters.windowed(4, 4, false) // [[A, B, C, D]]
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val theString = "Hello" theString.padEnd(7, '!') // Hello!!
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val theString = "Hello" theString.padStart(7, '!') // !!Hello
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val theString = "Left Right"
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val theString = "Left Right" theString.substringBefore(" ") // "Left"
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val theString = "Left Right" theString.substringBefore(" ") // "Left" theString.substringAfter(" ") // "Right"
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val someList = listOf("A", "B", "C")
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val someList = listOf("A", "B", "C") someList.any { it.length == 1 } // True!
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val someList = listOf("A", "B", "C") someList.all { it.length == 1 } // True!
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val someList = listOf("A", "B", "C") someList.none { it.length == 2 } // True!
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"3".toInt() // 3
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"3".toInt() // 3 '3'.toInt() // 51
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fun Char.asInt(): Int = this.toString().toInt()
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fun Char.asInt(): Int = this.toString().toInt() '3'.asInt() // 3
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