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Cómo simplificar (un revestimiento) una función recursiva que llama a una función en una matriz en Javascript

Me pregunto si hay algo que no entendí aquí. El código es:

 function countdown(n){ if(n < 1) return []; let result = countdown(n - 1); result.unshift(n); return result; }

Me pregunto por qué no se puede escribir así:

 function countdown(n){ if(n < 1) return []; return countdown(n - 1).unshift(n); }

Esto devuelve un error:

 TypeError: countdown(...).unshift is not a function

¿No son los dos lo mismo?

about 4 years ago · Juan Pablo Isaza
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