Consider the code snippet given below
var count = [1,,3];

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Consider the code snippet given below

var count = [1,,3];

What is the observation made?



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2) Consider the following code snippet

  var a1 = [,,,];
var a2 = new Array(3);
0 in a1
0 in a2
The result would be

3) The method or operator used to identify the array is

4) The reduce and reduceRight methods follow a common operation called

5) The primary purpose of the array map() function is that it

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