Can anyone provide an explanation in Javascript as to why the array [,,] has 2 undefined elements instead of three?
Given that the array [1,1,1] has 3 elements, this raises the question as to why [,,] only has two!
Can anyone provide an explanation in Javascript as to why the array [,,] has 2 undefined elements instead of three?
Given that the array [1,1,1] has 3 elements, this raises the question as to why [,,] only has two!
The concept originates from the specifications of ES6. Omitting any characters after the final comma denotes that the element should not be included in the length calculation.
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