I'm trying to understand why JavaScript behaves this way. To generate numbers from 1 to n inclusive in an array,
The following works:
console.log(new Array(5).fill().map((a,i)=>i+1)) //Result [1,2,3,4,5] as expected.
But if I remove fill() it doesn't work:
console.log(new Array(5).map((a,i)=>i+1)) //Result [undefined,undefined,undefined,undefined,undefined]
Since the array is already initialized and we are mapping from the indices, why does the latter not work?
I tried both in jsFiddle. This is more about clarifying a concept than solving a problem.
