Michele Di Salvatore micheledisalvatore
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| let invocationsCounter = 0 | |
| function f(s) { | |
| const stringsOfO = 'o'.repeat(invocationsCounter) | |
| if (s) { | |
| return `f${stringsOfO}${s}` | |
| } | |
| invocationsCounter++ | |
| return (() => f)() | |
| } |