Deleting array elements in Javascript-delete vs splice

The JavaScript array removes elements with Array.splice (start, deletecount);

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deleteWould delete the object property, but would not be reindex the array or update its length. This makes it appears as if it is undefined:

>MyArray= [A, ' B ',  ' C ' ,  ' d '   [ "a" ,  "B" ,  "C" ,  "D" ]>delete Myarray[0]< Span class= "PLN" > true> Myarray[0] undefined     

Note that it's not on fact set to the value undefined , rather the removed from the array, making it appear undefined. The Chrome dev tools make this distinction clear by printing when empty logging the array.

> myArray[0] undefined> myArray [empty, "b", "c", "d"]

myArray.splice(start, deleteCount)Actually removes the element, reindexes the array, and changes its length.

>MyArray= [A, ' B ', C, ' d '] [A,  "B" ,  "C" ,  "D" ]> Myarray. (0, 2   [ "a" , "B" ]> MyArray [ "C" ,  "D"  ]   

Deleting array elements in Javascript-delete vs splice