Consider the code snippet given below
var count = [1,,3];
What is the observation made?
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1) What will happen if reverse() and join() methods are used simultaneously ?
2) Consider the following code snippet
var a1 = [,,,]; The result would be
var a2 = new Array(3);
0 in a1
0 in a2
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