Day #2 Pro Tip #Javascript

Don’t use delete to remove an item from array

Dont !!!!

Use splice instead of using delete to delete an item from an array. Using delete replaces the item with undefined or empty instead of the removing it from the array.

Instead of…

var items = ['manjula','vihang' ,'arwa','sahil', 'foo' , , 'Doe']; 
items.length; // returns 7
delete items[3]; // return true 
items.length; // returns 7
/* items will be equal to ["manjula", "vihang", "arwa", empty, "foo", empty, "Doe"]   */

Use the below…

var items = ['manjula','vihang' ,'arwa','sahil', 'foo' , , 'Doe']; 
items.length; // returns 7
items.splice(3,1) ; 
items.length; // returns 6
/* items will be equal to ["manjula", "vihang", "arwa", "foo", empty, "Doe"]   */

The delete method should be used to delete an object property.

Thanks for reading !!

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