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Code code:"if (foo != bar)"
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body:"apples oranges"
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Code-golf is a competition to solve a particular problem in the fewest bytes of source code.

1 vote

Interpret PlusOrMinus

Kotlin, 76 bytes {fold(0){a,c->when(c){'-'->{print(a.toChar());a-1}'+'->a+1 else->a}and 255}} Try it online! -1 byte thanks to ceilingcat.
Cactusroot's user avatar
27 votes
6 answers
3k views

How many cacti can I plant here?

Given a Minecraft terrain as a 2-dimensional array of integers or similar datastructure, determine the maximum number of cacti that can be planted on it. The integers represent the height (y) of the t …
0 votes

Map key with value as standard

Kotlin, 35 bytes {split('(',')').drop(1).chunked(2)} Try on playground! I mean, they are associated, you can find the value for a key: val map = "(01)99012345670019(10)Ab1234(3102)00122515190521(337n …
Cactusroot's user avatar
0 votes

Convert a string of digits from words to an integer

Kotlin, 64 bytes {split(" ").fold(0){a,b->10*a+"rothuvsein".indexOf((b+b+b)[6])}} Improving upon this answer. Try it online!
Cactusroot's user avatar
2 votes

Convert binary to unary

Kotlin, 22 bytes {"*".repeat(toInt(2))} Try it online!
Cactusroot's user avatar
0 votes

Sleep for 1000 years

Kotlin, 25 bytes {Thread.sleep(7L shl 42)} 111 followed by 41 zeros (binary) is ~97.56% of 31556952000000 (decimal) Try it online!
Cactusroot's user avatar
3 votes

Pareto-optimal shortest paths

Kotlin, 248 228 211 bytes fun Set<IntArray>.p(i:Int=0):Set<Pair<Int,Int>> =if(i==maxOf{it[1]})setOf(0 to 0)else filter{it[0]==i}.flatMap{p(it[1]).map{(a,b)->a+it[2]to b+it[3]}}.run{filter{(a,b)->all{( …
Cactusroot's user avatar
1 vote

The shortest way to find one unique value when all other values are the same

Kotlin, 40 24 bytes {minBy{r->count{r==it}}} Try it online! It doesn't seem to have a count function where you can simply pass the lambda parameter. -16 bytes thanks to Seggan
Cactusroot's user avatar
2 votes

Are the brackets fully matched?

Kotlin, 100 89 86 bytes -11 bytes: Use any instead of firstOrNull -3 bytes: Use chunked instead of split (thanks to @leo848) fun f(s:String):Boolean="()<>[]{}".chunked(2).any{it in s&&f(s.replace(it," …
Cactusroot's user avatar
1 vote

Is it a doubling sequence?

Kotlin, 50 bytes {a:IntArray->(0..a.size-2).first{a[it]*2>a[it+1]}} Try it online! Int for false and Nothing for true (throws NoSuchElementException)
Cactusroot's user avatar
1 vote

Diagonalize a vector

Kotlin, 65 bytes {a:IntArray->Array(a.size){i->IntArray(a.size).also{it[i]=a[i]}}} Try it online!
Cactusroot's user avatar