add fizzbuzz

3 years ago · 5d491c6f3b
parent 8dcc77ffc0
commit 5d491c6f3b
1 changed files with 149 additions and 0 deletions
--- a/fizzbuzz.ts
+++ b/fizzbuzz.ts
@ -0,0 +1,149 @@
+import type { Equal, Expect } from '@type-challenges/utils'
+
+type cases = [
+  Expect<Equal<FizzBuzz<1>, ['1']>>,
+  Expect<Equal<FizzBuzz<5>, ['1', '2', 'Fizz', '4', 'Buzz']>>,
+  Expect<Equal<FizzBuzz<20>, [
+    '1',
+    '2',
+    'Fizz',
+    '4',
+    'Buzz',
+    'Fizz',
+    '7',
+    '8',
+    'Fizz',
+    'Buzz',
+    '11',
+    'Fizz',
+    '13',
+    '14',
+    'FizzBuzz',
+    '16',
+    '17',
+    'Fizz',
+    '19',
+    'Buzz',
+  ]>>,
+  Expect<Equal<FizzBuzz<100>, [
+    '1',
+    '2',
+    'Fizz',
+    '4',
+    'Buzz',
+    'Fizz',
+    '7',
+    '8',
+    'Fizz',
+    'Buzz',
+    '11',
+    'Fizz',
+    '13',
+    '14',
+    'FizzBuzz',
+    '16',
+    '17',
+    'Fizz',
+    '19',
+    'Buzz',
+    'Fizz',
+    '22',
+    '23',
+    'Fizz',
+    'Buzz',
+    '26',
+    'Fizz',
+    '28',
+    '29',
+    'FizzBuzz',
+    '31',
+    '32',
+    'Fizz',
+    '34',
+    'Buzz',
+    'Fizz',
+    '37',
+    '38',
+    'Fizz',
+    'Buzz',
+    '41',
+    'Fizz',
+    '43',
+    '44',
+    'FizzBuzz',
+    '46',
+    '47',
+    'Fizz',
+    '49',
+    'Buzz',
+    'Fizz',
+    '52',
+    '53',
+    'Fizz',
+    'Buzz',
+    '56',
+    'Fizz',
+    '58',
+    '59',
+    'FizzBuzz',
+    '61',
+    '62',
+    'Fizz',
+    '64',
+    'Buzz',
+    'Fizz',
+    '67',
+    '68',
+    'Fizz',
+    'Buzz',
+    '71',
+    'Fizz',
+    '73',
+    '74',
+    'FizzBuzz',
+    '76',
+    '77',
+    'Fizz',
+    '79',
+    'Buzz',
+    'Fizz',
+    '82',
+    '83',
+    'Fizz',
+    'Buzz',
+    '86',
+    'Fizz',
+    '88',
+    '89',
+    'FizzBuzz',
+    '91',
+    '92',
+    'Fizz',
+    '94',
+    'Buzz',
+    'Fizz',
+    '97',
+    '98',
+    'Fizz',
+    'Buzz',
+  ]>>,
+]
+
+type FizzBuzz<
+  N extends number,
+  Res extends string[] = [],
+  Acc extends 1[] = [1],
+  Acc3 extends 1[] = [1],
+  Acc5 extends 1[] = [1],
+> =
+Res['length'] extends N
+  ? Res
+  : Acc3['length'] extends 3
+    ? Acc5['length'] extends 5
+      ? FizzBuzz<N, [...Res, 'FizzBuzz'], [...Acc, 1], [1], [1]>
+      : FizzBuzz<N, [...Res, 'Fizz'], [...Acc, 1], [1], [...Acc5, 1]>
+    : Acc5['length'] extends 5
+      ? FizzBuzz<N, [...Res, 'Buzz'], [...Acc, 1], [...Acc3, 1], [1]>
+      : FizzBuzz<N, [...Res, `${Acc['length']}`], [...Acc, 1], [...Acc3, 1], [...Acc5, 1]>
+
+;