0040 JavaScript Interview Questions | #coding #javascript
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0040 JavaScript Interview Questions | #coding #javascript
In this video,
We have a JavaScript array and use the in operator to check if specific indices (1, 4, and 5) exist in the array.
In this video,
We have a JavaScript array and use the in operator to check if specific indices (1, 4, and 5) exist in the array.
1 in numbers: records true because index 1 exists (value is 20).
4 in numbers: records true because index 4 exists (value is 50).
5 in numbers: records false because index 5 does not exist.
Arrays in JavaScript are treated as objects and their indices are considered keys. Using Object.keys(numbers) displays the indices as keys ([/"0/
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