Rule Definition
The delete operator can be used to remove a property from any object. Arrays are objects, so the delete operator can be used here too, but if it is, a hole will be left in the array because the indexes/keys won't be shifted to reflect the deletion. Use the following methods to: - add/remove elements from the the array : Array.prototype.splice - add/remove elements from the end of the array : Array.prototype.pop - add/remove elements from the beginning of the array : Array.prototype.shift

Remediation
Use the following methods to: - add/remove elements from the the array : Array.prototype.splice - add/remove elements from the end of the array : Array.prototype.pop - add/remove elements from the beginning of the array : Array.prototype.shift

Violation Code Sample

var myArray = ['a', 'b', 'c', 'd']; 

delete myArray[2]; // Noncompliant. myArray => ['a', 'b', undefined, 'd'] 
console.log(myArray[2]); // expected value was 'd' but output is undefined

Fixed Code Sample

var myArray = ['a', 'b', 'c', 'd']; 

// removes 1 element from index 2 
removed = myArray.splice(2, 1); // myArray => ['a', 'b', 'd'] 
console.log(myArray[2]); // outputs 'd'

ASCMM-MNT-20