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Diffstat (limited to 'lib/leftpadesque/prepend.ts')
| -rw-r--r-- | lib/leftpadesque/prepend.ts | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/leftpadesque/prepend.ts b/lib/leftpadesque/prepend.ts new file mode 100644 index 0000000..1819536 --- /dev/null +++ b/lib/leftpadesque/prepend.ts @@ -0,0 +1,5 @@ +export const prependWith = (arr: string[], prep: string) => + Array(arr.length * 2) + .fill(0) + .map((_, i) => i % 2 === 0) + .map((isPrep, i) => (isPrep ? prep : arr[Math.floor(i / 2)]!)); |